Re: [Emc-users] Blacklisting parts of G-code

[andy pugh]

On 22 April 2016 at 01:02, Danny Miller  wrote:
> RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92 G94 G97 G98
>
> Sure.  And I do.  But I don't train people to reboot LinuxCNC every time
> they start, and I don't plan to.

One useful addition to the system might be a "reset defaults" physical
button on the panel somewhere. That could be linked to an MDI_COMMAND
that resets all offsets etc.

It could, possibly, run a routine to zero all the tool offsets too.
But that might take a bit of cunning as I think that G10 probably
errors if you try to set an offset for a tool not in the table.

-- 
atp
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designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Blacklisting parts of G-code

[andy pugh]

On 22 April 2016 at 05:15, Danny Miller  wrote:
> So then- get this- we selected "linuxcnc ARC" instead, whose only
> difference is supposed to be that circular arcs are made with G2/G3 arcs
> instead of many linear points.  Lo and behold, the G43.1 command did NOT
> end up in the output file.  Tried it several times.  Wouldn't believe it
> if I hadn't seen it.


Another possibility is a [FILTER] for incoming G-code files that
removes the commands that you want to deprecate. This is probably more
adaptable as you could set it up to not filter G-code files with an
alternative file extension, but still run them.

-- 
atp
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designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Gantry Component

[Sarah Armstrong]

re:gantry John ,.

i'm guessing by the state number and error , that your second Y axis ,may
well have hit the limit switch, before the the logic switches between the
Y1 & Y2
so it sees the Y1 limit as hit , when it should be homing . so for me a
slight change in the logic needed , i./e home the second Y2 before
switching to Limit mode

so and Y1 & Y2 first , need another look and setup a machine here i think



On 22 April 2016 at 00:48, John Thornton  wrote:

> I have the gantry moving but homing fails with hit limit in home state 7
> and joint 1 on limit switch
>
> http://gnipsel.com/files/emc/Gantry.zip
>
> JT
>
> On 4/21/2016 2:50 PM, John Thornton wrote:
> > I'm trying to understand the gantry component and I've almost got it
> > working but not quite. Both Y motors spin but are slow to spin up then
> > they don't stop... I assume I'm missing some part of the big picture.
> > The config is located here:
> >
> > http://gnipsel.com/files/emc/Gantry/
> >
> > What I did was take the config from the forum and tried to understand
> > the chain of motion for the two motors...
> >
> > JT
> >
> >
> >
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Re: [Emc-users] Question on DM860 stepper drivers

[andy pugh]

On 22 April 2016 at 03:05, Gene Heskett  wrote:
>> Bicycle pump? :-)
>
> I haven't seen one of those in 50 years on this side of the pond.

I assume that they still exist, unless the US has switched back to
solid rubber tyres.

A track pump would work:
http://www.ebay.com/itm/262396658868

But when real pneumatic cylinders are so cheap, why bother?
eBay has many. Rodless might fit the envelope more easily.
But: My mill has a big moving knee, has no counterbalance, and works
just fine. I suspect you just need a better match between spindle
speed and Z speed.

-- 
atp
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designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Question on DM860 stepper drivers

[Gene Heskett]

On Thursday 21 April 2016 23:29:21 Todd Zuercher wrote:

> What length stroke do you need? McMasterCarr has 3/4" cylinders in
> lengths up to 24".  (1-1/16" up to 36")
> http://www.mcmaster.com/#standard-air-cylinders/=12348ld

Those prices aren't friendly enough though. I can rig springs for half 
that.  But its looking like I'll have to make the springs anchors on the 
mill as I've pretty much had it with this 7x12, the rear gib strips 
vibrated loose yesterday and chomped up about $30 worth of carbide 
inserts from the chatter just making one of the 4 I needed last 
afternoon.

I am in the market for a bigger, more iron in its ass lathe, but 
fleabay's lathe selections are in a high vacuum suckage state when I 
searched last night.  One boxter? and one Monarch about covered what was 
available for under $1500.  From the pix, neither had been taken care of 
and were missing parts. Quite a bit of new stuff, all priced higher than 
I could get it from Bolton or grizzly.  Something in the 10x30 range I 
can convert might be attractive. Both of those 2 are within a long days 
drive from me, but neither adv listed the weight. And I know monarchs 
are at least capable of putting my GMC down on its snubbers.

> - Original Message -
> From: "Gene Heskett" 
> To: emc-users@lists.sourceforge.net
> Sent: Thursday, April 21, 2016 6:45:49 PM
> Subject: Re: [Emc-users] Question on DM860 stepper drivers
>
> On Thursday 21 April 2016 11:32:25 andy pugh wrote:
> > On 21 April 2016 at 16:17, Brent Loschen 
>
> wrote:
> > > I'm curious if anyone has compared moving mass (pulley/cable/mass)
> > > vs springs for counter weighting a G0704.  Other than ease of
> > > implementation, space requirements, etc., any real world
> > > advantages/disadvantages of either?
> >
> > A spring will only have the right force in one spot, it will be too
> > high or too low everywhere else.
> > A pulley and weight can be exactly balanced at all times. But
> > doubles the mass to be moved, so actually reduces peak acceleration.
> >
> > The ideal is probably a pneumatic strut with a relieving regulator.
>
> That isn't something we can steal off the tailgate of a
> mopar/mitsubishi van for a $30 bill apiece.  I also thought of that
> but with a 1 or 2 lb propane tank to serve as the expansion chamber. 
> That would not, except for the piston friction, have a huge effect on
> the accels or maxvels. Piston friction could be considerable though.
>
> Are there such beasts available, perhaps in a .750" or 20mm bore? 
> What I've found didn't have the stroke.
>
> Cheers, Gene Heskett


Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
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Re: [Emc-users] Question on DM860 stepper drivers

[Gene Heskett]

On Friday 22 April 2016 05:29:08 andy pugh wrote:

> On 22 April 2016 at 03:05, Gene Heskett  wrote:
> >> Bicycle pump? :-)
> >
> > I haven't seen one of those in 50 years on this side of the pond.
>
> I assume that they still exist, unless the US has switched back to
> solid rubber tyres.
>
> A track pump would work:
> http://www.ebay.com/itm/262396658868
>
> But when real pneumatic cylinders are so cheap, why bother?
> eBay has many. Rodless might fit the envelope more easily.
> But: My mill has a big moving knee, has no counterbalance, and works
> just fine. I suspect you just need a better match between spindle
> speed and Z speed.

And thats been shipped.  Motor and line powered driver.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Blacklisting parts of G-code

[John Thornton]

Doesn't T0 M6 remove all tool offsets?

JT

On 4/22/2016 4:16 AM, andy pugh wrote:
> On 22 April 2016 at 01:02, Danny Miller  wrote:
>> RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92 G94 G97 G98
>>
>> Sure.  And I do.  But I don't train people to reboot LinuxCNC every time
>> they start, and I don't plan to.
> One useful addition to the system might be a "reset defaults" physical
> button on the panel somewhere. That could be linked to an MDI_COMMAND
> that resets all offsets etc.
>
> It could, possibly, run a routine to zero all the tool offsets too.
> But that might take a bit of cunning as I think that G10 probably
> errors if you try to set an offset for a tool not in the table.
>


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Re: [Emc-users] Blacklisting parts of G-code

[andy pugh]

On 22 April 2016 at 12:33, John Thornton  wrote:
> Doesn't T0 M6 remove all tool offsets?

Yes, but it doesn't stop a CAM system inserting a TN G43 to bring them back.



-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Question on DM860 stepper drivers

[Todd Zuercher]

Air cylinders can be had for much cheaper off ebay.  The Mcmaster link was more 
for showing what's avalible.

I'd be concerned about a bycycle pumps seals holding up over time, especially 
if pressures exceed 70-80 psi.

Cheap used iron often can be found easier off of Craigslist than fleabay.

- Original Message -
From: "Gene Heskett" 
To: emc-users@lists.sourceforge.net
Sent: Friday, April 22, 2016 5:32:46 AM
Subject: Re: [Emc-users] Question on DM860 stepper drivers

On Thursday 21 April 2016 23:29:21 Todd Zuercher wrote:

> What length stroke do you need? McMasterCarr has 3/4" cylinders in
> lengths up to 24".  (1-1/16" up to 36")
> http://www.mcmaster.com/#standard-air-cylinders/=12348ld

Those prices aren't friendly enough though. I can rig springs for half 
that.  But its looking like I'll have to make the springs anchors on the 
mill as I've pretty much had it with this 7x12, the rear gib strips 
vibrated loose yesterday and chomped up about $30 worth of carbide 
inserts from the chatter just making one of the 4 I needed last 
afternoon.

I am in the market for a bigger, more iron in its ass lathe, but 
fleabay's lathe selections are in a high vacuum suckage state when I 
searched last night.  One boxter? and one Monarch about covered what was 
available for under $1500.  From the pix, neither had been taken care of 
and were missing parts. Quite a bit of new stuff, all priced higher than 
I could get it from Bolton or grizzly.  Something in the 10x30 range I 
can convert might be attractive. Both of those 2 are within a long days 
drive from me, but neither adv listed the weight. And I know monarchs 
are at least capable of putting my GMC down on its snubbers.

> - Original Message -
> From: "Gene Heskett" 
> To: emc-users@lists.sourceforge.net
> Sent: Thursday, April 21, 2016 6:45:49 PM
> Subject: Re: [Emc-users] Question on DM860 stepper drivers
>
> On Thursday 21 April 2016 11:32:25 andy pugh wrote:
> > On 21 April 2016 at 16:17, Brent Loschen 
>
> wrote:
> > > I'm curious if anyone has compared moving mass (pulley/cable/mass)
> > > vs springs for counter weighting a G0704.  Other than ease of
> > > implementation, space requirements, etc., any real world
> > > advantages/disadvantages of either?
> >
> > A spring will only have the right force in one spot, it will be too
> > high or too low everywhere else.
> > A pulley and weight can be exactly balanced at all times. But
> > doubles the mass to be moved, so actually reduces peak acceleration.
> >
> > The ideal is probably a pneumatic strut with a relieving regulator.
>
> That isn't something we can steal off the tailgate of a
> mopar/mitsubishi van for a $30 bill apiece.  I also thought of that
> but with a 1 or 2 lb propane tank to serve as the expansion chamber. 
> That would not, except for the piston friction, have a huge effect on
> the accels or maxvels. Piston friction could be considerable though.
>
> Are there such beasts available, perhaps in a .750" or 20mm bore? 
> What I've found didn't have the stroke.
>
> Cheers, Gene Heskett


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Gantry Component

[John Thornton]

Hi Sarah,

I'm thinking this morning that I might have the switches crossed so 
motor 0 is hitting the switch for motor 1. We will see in a bit.

JT

On 4/22/2016 4:21 AM, Sarah Armstrong wrote:
> re:gantry John ,.
>
> i'm guessing by the state number and error , that your second Y axis ,may
> well have hit the limit switch, before the the logic switches between the
> Y1 & Y2
> so it sees the Y1 limit as hit , when it should be homing . so for me a
> slight change in the logic needed , i./e home the second Y2 before
> switching to Limit mode
>
> so and Y1 & Y2 first , need another look and setup a machine here i think
>
>
>
> On 22 April 2016 at 00:48, John Thornton  wrote:
>
>> I have the gantry moving but homing fails with hit limit in home state 7
>> and joint 1 on limit switch
>>
>> http://gnipsel.com/files/emc/Gantry.zip
>>
>> JT
>>
>> On 4/21/2016 2:50 PM, John Thornton wrote:
>>> I'm trying to understand the gantry component and I've almost got it
>>> working but not quite. Both Y motors spin but are slow to spin up then
>>> they don't stop... I assume I'm missing some part of the big picture.
>>> The config is located here:
>>>
>>> http://gnipsel.com/files/emc/Gantry/
>>>
>>> What I did was take the config from the forum and tried to understand
>>> the chain of motion for the two motors...
>>>
>>> JT
>>>
>>>
>>>
>> --
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>> Manager
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>
>


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Re: [Emc-users] Gantry Component

[Sarah Armstrong]

yea that would account for it

On 22 April 2016 at 13:03, John Thornton  wrote:

> Hi Sarah,
>
> I'm thinking this morning that I might have the switches crossed so
> motor 0 is hitting the switch for motor 1. We will see in a bit.
>
> JT
>
> On 4/22/2016 4:21 AM, Sarah Armstrong wrote:
> > re:gantry John ,.
> >
> > i'm guessing by the state number and error , that your second Y axis ,may
> > well have hit the limit switch, before the the logic switches between the
> > Y1 & Y2
> > so it sees the Y1 limit as hit , when it should be homing . so for me a
> > slight change in the logic needed , i./e home the second Y2 before
> > switching to Limit mode
> >
> > so and Y1 & Y2 first , need another look and setup a machine here i think
> >
> >
> >
> > On 22 April 2016 at 00:48, John Thornton  wrote:
> >
> >> I have the gantry moving but homing fails with hit limit in home state 7
> >> and joint 1 on limit switch
> >>
> >> http://gnipsel.com/files/emc/Gantry.zip
> >>
> >> JT
> >>
> >> On 4/21/2016 2:50 PM, John Thornton wrote:
> >>> I'm trying to understand the gantry component and I've almost got it
> >>> working but not quite. Both Y motors spin but are slow to spin up then
> >>> they don't stop... I assume I'm missing some part of the big picture.
> >>> The config is located here:
> >>>
> >>> http://gnipsel.com/files/emc/Gantry/
> >>>
> >>> What I did was take the config from the forum and tried to understand
> >>> the chain of motion for the two motors...
> >>>
> >>> JT
> >>>
> >>>
> >>>
> >>
> --
> >>> Find and fix application performance issues faster with Applications
> >> Manager
> >>> Applications Manager provides deep performance insights into multiple
> >> tiers of
> >>> your business applications. It resolves application problems quickly
> and
> >>> reduces your MTTR. Get your free trial!
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> >>> ___
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> >>> Emc-users@lists.sourceforge.net
> >>> https://lists.sourceforge.net/lists/listinfo/emc-users
> >>
> >>
> >>
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> >> Manager
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> >
>
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>
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Re: [Emc-users] John T's Plasma o ?

[Jim Craig]

Excellent! We made first sparks last night. Still need to get THC 
running. Should get that done this weekend.

I am also going to use the Gantry component. Also to be implemented this 
weekend.

Thanks,

Jim


On 4/21/2016 5:12 PM, John Thornton wrote:
> I share everything... except my wife.
>
> http://gnipsel.com/linuxcnc/index.html
>
> Look in the HAL Examples
>
> JT
>
> On 4/21/2016 4:53 PM, Jim Craig wrote:
>> John,
>>
>> Thanks for all of the help and information. Would you mind sharing your
>> alignment subroutines also? o , o, o,
>> o.
>>
>> This setup will be very similar your setup with two parports.
>>
>> Thanks again,
>>
>> Jim
>>
>>
>> On 4/21/2016 3:52 PM, John Thornton wrote:
>>> It was suggested that I do that by PCW many times. I assume better
>>> following of the tip voltage but I can't measure the difference.
>>>
>>> JT
>>>
>>> On 4/21/2016 3:23 PM, Jim Craig wrote:
 Yep sure enough those values are in the manual. It is a Thermal Dynamics
 Cutmaster 52.

 What are the improvements of the thc-pid vs the thc component?

 Thanks

 Jim


 On 4/21/2016 2:46 PM, John Thornton wrote:
> Those values will be in the cut charts for your plasma cutter. It's
> different with different materials and thicknesses and varies with
> plasma torches too. What kind of plasma cutter do you have?
>
> Forgot the postgui.hal part, I've updated the page and also added my
> entire configuration.
>
> JT
>
> On 4/21/2016 1:17 PM, Jim Craig wrote:
>> More questions. So are you still using the o subroutine to
>> probe the material before each cut?
>>
>> If so I will go back to my original questions what are some good typical
>> starting values for pierce height, pierce delay, and cut height?
>>
>> Is the thc-pid comp significantly better than the thc comp?
>>
>> What do you use to enable and disable the thc? Do you use a gcode to set
>> the enable pin? I don't see anywhere in the sample HAL file where you
>> have anything connected to the thc-pid.enable pin.
>>
>> Thanks,
>>
>> Jim
>>
>> On 4/21/2016 12:06 PM, John Thornton wrote:
>>> Silly typo... links fixed now.
>>>
>>> JT
>>>
>>> On 4/21/2016 11:25 AM, Jim Craig wrote:
 If you are referring to theTHCAD PID Configuration Files
 

 the link appears to be broken.

 Thanks,

 Jim


 On 4/21/2016 10:55 AM, John Thornton wrote:
> I added the info to the Links page here http://www.mesaus.com/
>
> JT
>
> On 4/20/2016 4:39 PM, Jim Craig wrote:
>> John,
>>
>> I have been looking at your o subroutine. I plan on using 
>> it
>> on the plasma cutter I am building with a buddy. My question is what 
>> are
>> typical values that you are using for pierce height, pierce delay and
>> cut height?
>>
>> Do you switch to THC after the o subroutine? If so what are
>> you using to toggle the thc.enable pin? Are you using an M62-M65 
>> command
>> to to toggle the thc.enable?
>>
>> Thanks,
>>
>> Jim
>>
>>
>>
>> --
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>> Manager
>> Applications Manager provides deep performance insights into 
>> multiple tiers of
>> your business applications. It resolves application problems quickly 
>> and
>> reduces your MTTR. Get your free trial!
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> Manager
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 Applications

Re: [Emc-users] Blacklisting parts of G-code

[Ken Strauss]

You can use G10 L1 P3 to set the offset of all 256 tool table entries 
regardless of their past contents. This is with Pathpilot but I have not tried 
it with the unmodified LinuxCNC.

It seems to me that you have two choices:
1) Require a reboot and run a startup file to clear the tool table and other 
persistent data before each user starts work
or
2) Require the users to use operating procedures and posts that are known to 
play well together.

The first options seems to be far easier to implement!

> -Original Message-
> From: andy pugh [mailto:bodge...@gmail.com]
> Sent: Friday, April 22, 2016 5:17 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Blacklisting parts of G-code
>
> On 22 April 2016 at 01:02, Danny Miller  wrote:
> > RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92
> G94 G97
> > G98
> >
> > Sure.  And I do.  But I don't train people to reboot LinuxCNC every
> > time they start, and I don't plan to.
>
> One useful addition to the system might be a "reset defaults" physical 
> button
> on the panel somewhere. That could be linked to an MDI_COMMAND that
> resets all offsets etc.
>
> It could, possibly, run a routine to zero all the tool offsets too.
> But that might take a bit of cunning as I think that G10 probably errors if 
> you
> try to set an offset for a tool not in the table.
>
> --
> atp
> "A motorcycle is a bicycle with a pandemonium attachment and is designed
> for the especial use of mechanical geniuses, daredevils and lunatics."
> - George Fitch, Atlanta Constitution Newspaper, 1916
>
> --
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> Applications Manager provides deep performance insights into multiple tiers
> of your business applications. It resolves application problems quickly and
> reduces your MTTR. Get your free trial!
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Re: [Emc-users] Blacklisting parts of G-code

[Todd Zuercher]

I second the filter idea.  I was also thinking of suggesting using a filter 
program to always insert a safe preamble, postamble and convert/remove bad 
codes.  I have a few machines set up this way (to be able to run files set up 
for different machines).  I also have often set up a vcp button to run a reset 
program, its very handy. 

- Original Message -
From: "andy pugh" 
To: "Enhanced Machine Controller (EMC)" 
Sent: Friday, April 22, 2016 5:18:49 AM
Subject: Re: [Emc-users] Blacklisting parts of G-code

On 22 April 2016 at 05:15, Danny Miller  wrote:
> So then- get this- we selected "linuxcnc ARC" instead, whose only
> difference is supposed to be that circular arcs are made with G2/G3 arcs
> instead of many linear points.  Lo and behold, the G43.1 command did NOT
> end up in the output file.  Tried it several times.  Wouldn't believe it
> if I hadn't seen it.


Another possibility is a [FILTER] for incoming G-code files that
removes the commands that you want to deprecate. This is probably more
adaptable as you could set it up to not filter G-code files with an
alternative file extension, but still run them.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Gantry Component

[John Thornton]

The switches were reversed but setting them correct and I still get the 
limit error.

JT

On 4/22/2016 7:14 AM, Sarah Armstrong wrote:
> yea that would account for it
>
> On 22 April 2016 at 13:03, John Thornton  wrote:
>
>> Hi Sarah,
>>
>> I'm thinking this morning that I might have the switches crossed so
>> motor 0 is hitting the switch for motor 1. We will see in a bit.
>>
>> JT
>>
>> On 4/22/2016 4:21 AM, Sarah Armstrong wrote:
>>> re:gantry John ,.
>>>
>>> i'm guessing by the state number and error , that your second Y axis ,may
>>> well have hit the limit switch, before the the logic switches between the
>>> Y1 & Y2
>>> so it sees the Y1 limit as hit , when it should be homing . so for me a
>>> slight change in the logic needed , i./e home the second Y2 before
>>> switching to Limit mode
>>>
>>> so and Y1 & Y2 first , need another look and setup a machine here i think
>>>
>>>
>>>
>>> On 22 April 2016 at 00:48, John Thornton  wrote:
>>>
 I have the gantry moving but homing fails with hit limit in home state 7
 and joint 1 on limit switch

 http://gnipsel.com/files/emc/Gantry.zip

 JT

 On 4/21/2016 2:50 PM, John Thornton wrote:
> I'm trying to understand the gantry component and I've almost got it
> working but not quite. Both Y motors spin but are slow to spin up then
> they don't stop... I assume I'm missing some part of the big picture.
> The config is located here:
>
> http://gnipsel.com/files/emc/Gantry/
>
> What I did was take the config from the forum and tried to understand
> the chain of motion for the two motors...
>
> JT
>
>
>
>> --
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 Manager
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 tiers of
> your business applications. It resolves application problems quickly
>> and
> reduces your MTTR. Get your free trial!
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 Manager
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 tiers of
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>>>
>>
>>
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>> Manager
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>> reduces your MTTR. Get your free trial!
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>
>


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Re: [Emc-users] Need to add a faster thread base-thread with 100 microseconds, Compilation changes required !!!

[adit bhargava]

Hello Andy,
For disabling the stepgens in config string, I think the value of 
"num_stepgens"  be changed :Does this is all I need to do for disabling 
stepgens ?
num_stepgens [optional, default: -1]Only enable the first N stepgens. If N is 
-1, all stepgens are enabled. If N is 0, no stepgens are enabled. If N is 
greater than the number of stepgens available in the firmware, the board will 
fail to register.


And I saw some option of sserial_port_N: Should I need to change something in 
this as well ? See below:

sserial_port_N (N = 0 .. 3) [optional, default:  for all 
ports]Up to 32 Smart Serial devices can be connected to a Mesa Anything IO 
board depending on the firmware used and the number of physical connections on 
the board. These are arranged in 1-4 ports of 1 to 8 channels. 
Some Smart Serial (SSLBP) cards offer more than one load-time configuration, 
for example all inputs, or all outputs, or offering additional analogue input 
on some digital pins. 
To set the modes for port 0 use, for example sserial_port_0=0120 
A ’0’in the string sets the corresponding port to mode 0, 1 to mode 1, and so 
on up to mode 9. An "x" in any position disables that channel and makes the 
corresponding FPGA pins available as GPIO. 
The string can be up to 8 characters long, and if it defines more modes than 
there are channels on the port then the extras are ignored. Channel numbering 
is left to right so the example above would set sserial device 0.0 to mode 0, 
0.2 to mode2 and disable channels 0.4 onwards. 
The sserial driver will auto-detect connected devices, no further configuration 
should be needed. Unconnected channels will default to GPIO, but the pin values 
will vary semi-randomly during boot when card-detection runs, to it is best to 
actively disable any channel that is to be used for GPIO.

BR Adit  From: andy pugh 
 To: Enhanced Machine Controller (EMC)  
 Sent: Thursday, April 21, 2016 2:08 PM
 Subject: Re: [Emc-users] Need to add a faster thread base-thread with 100 
microseconds, Compilation changes required !!!
   
On 21 April 2016 at 13:00, adit bhargava  wrote:

> My mentor dosen't want to make any change in hardware FPGA cards.
> He instead suggest to use Universal Pulse Generator UPG100
> http://www.eurias.nl/pdf/UPG100.pdf

I think that he is misunderstanding the suggestions then. Flashing a
different firmware is not a modification, and it entirely reversible.

But first you should try disabling the last stepgen in the
configuration string and using software PWM on the associated pin.
This will need you to add the write_gpio function to the fast thread,
as suggested by Seb.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] John T's Plasma o ?

[John Thornton]

Let me know how that works for you, I'm struggling with the homing atm.

JT

On 4/22/2016 7:43 AM, Jim Craig wrote:
> Excellent! We made first sparks last night. Still need to get THC
> running. Should get that done this weekend.
>
> I am also going to use the Gantry component. Also to be implemented this
> weekend.
>
> Thanks,
>
> Jim
>
>
> On 4/21/2016 5:12 PM, John Thornton wrote:
>> I share everything... except my wife.
>>
>> http://gnipsel.com/linuxcnc/index.html
>>
>> Look in the HAL Examples
>>
>> JT
>>
>> On 4/21/2016 4:53 PM, Jim Craig wrote:
>>> John,
>>>
>>> Thanks for all of the help and information. Would you mind sharing your
>>> alignment subroutines also? o , o, o,
>>> o.
>>>
>>> This setup will be very similar your setup with two parports.
>>>
>>> Thanks again,
>>>
>>> Jim
>>>
>>>
>>> On 4/21/2016 3:52 PM, John Thornton wrote:
 It was suggested that I do that by PCW many times. I assume better
 following of the tip voltage but I can't measure the difference.

 JT

 On 4/21/2016 3:23 PM, Jim Craig wrote:
> Yep sure enough those values are in the manual. It is a Thermal Dynamics
> Cutmaster 52.
>
> What are the improvements of the thc-pid vs the thc component?
>
> Thanks
>
> Jim
>
>
> On 4/21/2016 2:46 PM, John Thornton wrote:
>> Those values will be in the cut charts for your plasma cutter. It's
>> different with different materials and thicknesses and varies with
>> plasma torches too. What kind of plasma cutter do you have?
>>
>> Forgot the postgui.hal part, I've updated the page and also added my
>> entire configuration.
>>
>> JT
>>
>> On 4/21/2016 1:17 PM, Jim Craig wrote:
>>> More questions. So are you still using the o subroutine to
>>> probe the material before each cut?
>>>
>>> If so I will go back to my original questions what are some good typical
>>> starting values for pierce height, pierce delay, and cut height?
>>>
>>> Is the thc-pid comp significantly better than the thc comp?
>>>
>>> What do you use to enable and disable the thc? Do you use a gcode to set
>>> the enable pin? I don't see anywhere in the sample HAL file where you
>>> have anything connected to the thc-pid.enable pin.
>>>
>>> Thanks,
>>>
>>> Jim
>>>
>>> On 4/21/2016 12:06 PM, John Thornton wrote:
 Silly typo... links fixed now.

 JT

 On 4/21/2016 11:25 AM, Jim Craig wrote:
> If you are referring to theTHCAD PID Configuration Files
> 
>
> the link appears to be broken.
>
> Thanks,
>
> Jim
>
>
> On 4/21/2016 10:55 AM, John Thornton wrote:
>> I added the info to the Links page here http://www.mesaus.com/
>>
>> JT
>>
>> On 4/20/2016 4:39 PM, Jim Craig wrote:
>>> John,
>>>
>>> I have been looking at your o subroutine. I plan on using 
>>> it
>>> on the plasma cutter I am building with a buddy. My question is 
>>> what are
>>> typical values that you are using for pierce height, pierce delay 
>>> and
>>> cut height?
>>>
>>> Do you switch to THC after the o subroutine? If so what 
>>> are
>>> you using to toggle the thc.enable pin? Are you using an M62-M65 
>>> command
>>> to to toggle the thc.enable?
>>>
>>> Thanks,
>>>
>>> Jim
>>>
>>>
>>>
>>> --
>>> Find and fix application performance issues faster with 
>>> Applications Manager
>>> Applications Manager provides deep performance insights into 
>>> multiple tiers of
>>> your business applications. It resolves application problems 
>>> quickly and
>>> reduces your MTTR. Get your free trial!
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>> Manager
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>> multiple tiers of
>> your business applications. It resolves application problems quickly 
>> and
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Re: [Emc-users] Need to add a faster thread base-thread with 100 microseconds, Compilation changes required !!!

[andy pugh]

On 22 April 2016 at 14:26, adit bhargava  wrote:

> For disabling the stepgens in config string, I think the value of 
> "num_stepgens"  be changed :Does this is all I need to do for disabling 
> stepgens ?

Yes. But be aware that it is the highest-numbered stepgen pins that
will become the GPIO pins.

> And I saw some option of sserial_port_N: Should I need to change something in 
> this as well ?

You can if you wish. That would enable features such as MPG counters
and analogue inputs on the 7i76 card.
You can see the software modes listed in the dmesg output. They are
also listed in the 7i76man.pdf file

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] John T's Plasma o ?

[John Thornton]

Well, I got homing working finally...

On 4/22/2016 8:42 AM, John Thornton wrote:
> Let me know how that works for you, I'm struggling with the homing atm.
>
> JT
>
> On 4/22/2016 7:43 AM, Jim Craig wrote:
>> Excellent! We made first sparks last night. Still need to get THC
>> running. Should get that done this weekend.
>>
>> I am also going to use the Gantry component. Also to be implemented this
>> weekend.
>>
>> Thanks,
>>
>> Jim
>>
>>
>> On 4/21/2016 5:12 PM, John Thornton wrote:
>>> I share everything... except my wife.
>>>
>>> http://gnipsel.com/linuxcnc/index.html
>>>
>>> Look in the HAL Examples
>>>
>>> JT
>>>
>>> On 4/21/2016 4:53 PM, Jim Craig wrote:
 John,

 Thanks for all of the help and information. Would you mind sharing your
 alignment subroutines also? o , o, o,
 o.

 This setup will be very similar your setup with two parports.

 Thanks again,

 Jim


 On 4/21/2016 3:52 PM, John Thornton wrote:
> It was suggested that I do that by PCW many times. I assume better
> following of the tip voltage but I can't measure the difference.
>
> JT
>
> On 4/21/2016 3:23 PM, Jim Craig wrote:
>> Yep sure enough those values are in the manual. It is a Thermal Dynamics
>> Cutmaster 52.
>>
>> What are the improvements of the thc-pid vs the thc component?
>>
>> Thanks
>>
>> Jim
>>
>>
>> On 4/21/2016 2:46 PM, John Thornton wrote:
>>> Those values will be in the cut charts for your plasma cutter. It's
>>> different with different materials and thicknesses and varies with
>>> plasma torches too. What kind of plasma cutter do you have?
>>>
>>> Forgot the postgui.hal part, I've updated the page and also added my
>>> entire configuration.
>>>
>>> JT
>>>
>>> On 4/21/2016 1:17 PM, Jim Craig wrote:
 More questions. So are you still using the o subroutine to
 probe the material before each cut?

 If so I will go back to my original questions what are some good 
 typical
 starting values for pierce height, pierce delay, and cut height?

 Is the thc-pid comp significantly better than the thc comp?

 What do you use to enable and disable the thc? Do you use a gcode to 
 set
 the enable pin? I don't see anywhere in the sample HAL file where you
 have anything connected to the thc-pid.enable pin.

 Thanks,

 Jim

 On 4/21/2016 12:06 PM, John Thornton wrote:
> Silly typo... links fixed now.
>
> JT
>
> On 4/21/2016 11:25 AM, Jim Craig wrote:
>> If you are referring to theTHCAD PID Configuration Files
>> 
>>
>> the link appears to be broken.
>>
>> Thanks,
>>
>> Jim
>>
>>
>> On 4/21/2016 10:55 AM, John Thornton wrote:
>>> I added the info to the Links page here http://www.mesaus.com/
>>>
>>> JT
>>>
>>> On 4/20/2016 4:39 PM, Jim Craig wrote:
 John,

 I have been looking at your o subroutine. I plan on 
 using it
 on the plasma cutter I am building with a buddy. My question is 
 what are
 typical values that you are using for pierce height, pierce delay 
 and
 cut height?

 Do you switch to THC after the o subroutine? If so what 
 are
 you using to toggle the thc.enable pin? Are you using an M62-M65 
 command
 to to toggle the thc.enable?

 Thanks,

 Jim



 --
 Find and fix application performance issues faster with 
 Applications Manager
 Applications Manager provides deep performance insights into 
 multiple tiers of
 your business applications. It resolves application problems 
 quickly and
 reduces your MTTR. Get your free trial!
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 ___
 Emc-users mailing list
 Emc-users@lists.sourceforge.net
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>>> --
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>>> qui

Re: [Emc-users] Gantry Component

[John Thornton]

Finally guessed enough times to get it working... now to document it all.

JT

On 4/22/2016 8:30 AM, John Thornton wrote:
> The switches were reversed but setting them correct and I still get the
> limit error.
>
> JT
>
> On 4/22/2016 7:14 AM, Sarah Armstrong wrote:
>> yea that would account for it
>>
>> On 22 April 2016 at 13:03, John Thornton  wrote:
>>
>>> Hi Sarah,
>>>
>>> I'm thinking this morning that I might have the switches crossed so
>>> motor 0 is hitting the switch for motor 1. We will see in a bit.
>>>
>>> JT
>>>
>>> On 4/22/2016 4:21 AM, Sarah Armstrong wrote:
 re:gantry John ,.

 i'm guessing by the state number and error , that your second Y axis ,may
 well have hit the limit switch, before the the logic switches between the
 Y1 & Y2
 so it sees the Y1 limit as hit , when it should be homing . so for me a
 slight change in the logic needed , i./e home the second Y2 before
 switching to Limit mode

 so and Y1 & Y2 first , need another look and setup a machine here i think



 On 22 April 2016 at 00:48, John Thornton  wrote:

> I have the gantry moving but homing fails with hit limit in home state 7
> and joint 1 on limit switch
>
> http://gnipsel.com/files/emc/Gantry.zip
>
> JT
>
> On 4/21/2016 2:50 PM, John Thornton wrote:
>> I'm trying to understand the gantry component and I've almost got it
>> working but not quite. Both Y motors spin but are slow to spin up then
>> they don't stop... I assume I'm missing some part of the big picture.
>> The config is located here:
>>
>> http://gnipsel.com/files/emc/Gantry/
>>
>> What I did was take the config from the forum and tried to understand
>> the chain of motion for the two motors...
>>
>> JT
>>
>>
>>
>>> --
>> Find and fix application performance issues faster with Applications
> Manager
>> Applications Manager provides deep performance insights into multiple
> tiers of
>> your business applications. It resolves application problems quickly
>>> and
>> reduces your MTTR. Get your free trial!
>> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
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>>> Manager
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Re: [Emc-users] Need to add a faster thread base-thread with 100 microseconds, Compilation changes required !!!

[adit bhargava]

Hello Andy,
For serial_port_N option, is it for 7i76 card?I remember you suggested me to 
just disable the Stepgen on 5i25 card which can be done using only num_stepgens 
parameter and then this pin can be used for software PWM rather than 7i76 .
BRAdit

Sent from Yahoo Mail on Android 
 
  On Fri, 22 Apr, 2016 at 15:54, andy pugh wrote:   On 22 
April 2016 at 14:26, adit bhargava  wrote:

> For disabling the stepgens in config string, I think the value of 
> "num_stepgens"  be changed :Does this is all I need to do for disabling 
> stepgens ?

Yes. But be aware that it is the highest-numbered stepgen pins that
will become the GPIO pins.

> And I saw some option of sserial_port_N: Should I need to change something in 
> this as well ?

You can if you wish. That would enable features such as MPG counters
and analogue inputs on the 7i76 card.
You can see the software modes listed in the dmesg output. They are
also listed in the 7i76man.pdf file

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916  
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Re: [Emc-users] hands-on EDM experience

[Nicklas Karlsson]

.75 amps is very dangerous as soon as voltage is high enough. Low current and 
it should not be dangerous even for rather high voltage.

Preferably I want to stay at low current at least until prototype leave desktop.

Since dielectric breakdown strength only has volts and distance I guess volt 
should be adjusted so that ionization is not started at to long distance which 
would create a big crater.

I however want to keep current low to stay safe but does the current change how 
large a channel is created or will it grow large enough anyway as soon as the 
real current start?


Regards Nicklas Karlsson




On Thu, 21 Apr 2016 22:03:32 +0800
Thomas Powderly  wrote:

> initiation ONLY depends on voltage
> i use .75 amps and its overkill
> but it was easy to make the circuit
> the equation for dielectric breakdown strength only has volts and distance
> but
> higher voltage makes ionization easier
> typical value are 100 to 300VDC
> tho for some paarungs ( stahl bis stahl, copper to crystal ... ) upwards 
> of 1000V= are used
> hth tomp
> 
> On 04/21/16 20:13, Nicklas Karlsson wrote:
> > I certainly discovered the need to back off.
> >
> > As is now I use only 10mA for ionization and 10A for cuts. I want to keep 
> > ionization current down for safety reason, do you know if it is harder to 
> > get process running at low current?
> >
> > Regards Nicklas Karlsson
> >
> >
> >
> > On Thu, 17 Mar 2016 15:15:10 + (UTC)
> > Pete_Gruendeman  wrote:
> >
> >> Hi Nicklas:
> >>  Did you set up and run the simple RC type EDM?  It's a pretty simple 
> >> proposition, using a filtered DC power supply, a capacitor in parallel 
> >> with the gap and the gap itself.  An electrolytic capacitor would work.  A 
> >> motor-run capacitor, of 50-100 micro Farads would work even better.  
> >> Hands-on experience will answer many of you questions, especially in 
> >> regard to the stability of the process.  No matter how stable your process 
> >> is, backing up is part of this artform.
> >>
> >> Pete
> >> 
> >> On Thu, 3/10/16, Nicklas Karlsson  wrote:
> >>
> >>   Subject: Re: hands-on EDM experience
> >>   To: "Pete_Gruendeman" 
> >>   Date: Thursday, March 10, 2016, 8:49 AM
> >>   
> >>   > Hi Nicklas:
> >>   > I wrote and sent this last
> >>   night but it seems to have bounced instead of reaching
> >>   you.  I want you to get some hands on experience with EDM,
> >>   even if it's a simple RC type EDM that you clamp onto a
> >>   milling machine and flush with a turkey baster you borrow
> >>   from the kitchen.  Even though I had run commercial EDMs,
> >>   it was eye opening to run the process manually.  The whole
> >>   process can be complicated but it doesn't have to be.
> >>   Read below.
> >>   >
> >>   > Hi
> >>   tomp and Nicklas:
> >>   >
> >>  Careful tomp as much of what you wrote is some
> >>   pretty technical stuff.  It might be over Nicklas' head
> >>   since he is new to EDM.  I barely recognize some of this
> >>   but do recall that Agie offered auto-overcut compensation.
> >>   I always turned that off as much of my work was something
> >>   like a horizontally oriented cylinder and I typically
> >>   orbited about the X-axis.
> >>   >
> >>   > Nicklas:  Have you done
> >>   anything with EDM yet?, even with a simple resistive
> >>   capacitive spark eroder?, perhaps set up on a milling
> >>   machine or other platform?  And I don't mean CNC.  I
> >>   mean with control being provided by your ears and your
> >>   hands.  And flushing with a baster from the kitchen.  Much
> >>   of the discussion here will make more sense if you have even
> >>   a little hands-on experience with EDM.  Being a beginner is
> >>   fine.  I really want you to know instinctively what a
> >>   stable burn sounds like, and what gap contamination looks
> >>   like, sounds like and how quickly you need to do something
> >>   about it when the burn starts to become unstable.  These
> >>   various hands-on skills will be more confusing to you when
> >>   you try to learn it with the complexities of CNC added to
> >>   the mix.  Let's get your hands oily and a little EDM
> >>   crackling sound in your ears as soon as possible.  It takes
> >>   very little equipment to replicate Lazarenkos'
> >>   experiments and that's all I want you to do to get
> >>   started.  You can get started with a copper or brass
> >>   electrode.  Let me know how I can help you get started.
> >>   >
> >>   > Pete
> >>   
> >>   Well I am more interested in
> >>   the CNC part and an EDM is what I could buy cheap. My first
> >>   sparcs will be coffecup EDM with food oil, it is still a few
> >>   days away since I have to spend a few days on others.
> >>   
> >>   
> >>   Nicklas
> >>   Karlsson
> > --
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> > Applications Manager provides deep perfor

Re: [Emc-users] Need to add a faster thread base-thread with 100 microseconds, Compilation changes required !!!

[andy pugh]

On 22 April 2016 at 15:18, adit bhargava  wrote:

> For serial_port_N option, is it for 7i76 card?

One chanel  of sserial is for the GPIO and some other features on the
7i76. The second channel is for any smart-serial device attached to
the expansion port on the 7i76.

> I remember you suggested me to just disable the Stepgen on 5i25 card which
> can be done using only num_stepgens parameter and then this pin can be used
> for software PWM rather than 7i76 .

Almost. The highest-numbered stepgen (the one that you will be
disabling) will probably be connected to physical pins on the 7i78.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Need to add a faster thread base-thread with 100 microseconds, Compilation changes required !!!

[adit bhargava]

Does this mean that if I redirect the PWM output to 5i25 GPIO pin(after 
disabling the stepgen),the PWM signal will be forwarded to 7i76 also ? So, it 
means I don't need to change the connection of Oscilloscope which is connected 
to 7i76 right now ? Just redirect the PWM output to 5i25 GPIO pin and it will 
reach oscilloscope ?

  From: andy pugh 
 To: "adit_bh...@yahoo.com"  
Cc: Enhanced Machine Controller (EMC) 
 Sent: Friday, April 22, 2016 4:31 PM
 Subject: Re: [Emc-users] Need to add a faster thread base-thread with 100 
microseconds, Compilation changes required !!!
   
On 22 April 2016 at 15:18, adit bhargava  wrote:

> For serial_port_N option, is it for 7i76 card?

One chanel  of sserial is for the GPIO and some other features on the
7i76. The second channel is for any smart-serial device attached to
the expansion port on the 7i76.

> I remember you suggested me to just disable the Stepgen on 5i25 card which
> can be done using only num_stepgens parameter and then this pin can be used
> for software PWM rather than 7i76 .

Almost. The highest-numbered stepgen (the one that you will be
disabling) will probably be connected to physical pins on the 7i78.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

  
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Re: [Emc-users] Need to add a faster thread base-thread with 100 microseconds, Compilation changes required !!!

[andy pugh]

On 22 April 2016 at 15:43, adit bhargava  wrote:
> Does this mean that if I redirect the PWM output to 5i25 GPIO pin(after
> disabling the stepgen),
> the PWM signal will be forwarded to 7i76 also ?

No, the 5i25 pins currently associated with the highest-numbered
stepgen are hard-wired to the port that you (probably) have the 7i78
connected to.
Though you could swap the 7i78 and 7i76 ports.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Blacklisting parts of G-code

[Gene Heskett]

On Friday 22 April 2016 07:38:59 andy pugh wrote:

> On 22 April 2016 at 12:33, John Thornton  wrote:
> > Doesn't T0 M6 remove all tool offsets?
>
> Yes, but it doesn't stop a CAM system inserting a TN G43 to bring them
> back.

I'd think any CAM system that did that AND did its own offsets was 
broken. Unless it has the G10's to write its own tool table. In that 
event, it should be the responsibility of the operator bringing in the 
gcode, to also load the tool changer correctly to match his code.  And 
to restore the tool changer to its default loading when he is finished 
so the next user isn't surprised.

But that has its own kit of gotcha's.  Perhaps, if the tool changer has 
enough pockets, you could mandate to the customer that his CAM system is 
to use your default loading?  But with the variety of work, even a 50 
pocket chain type carousel would soon be found wanting.

It's certainly a kettle of fish that would rapidly get past its "use by 
date" for me. (shuddering at the thought even)

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Need to add a faster thread base-thread with 100 microseconds, Compilation changes required !!!

[adit bhargava]

So the highest-numbered  5i25 pin is connected to 7i78 and not 7i76 on which I 
was earlier redirecting output.I may connect the CRO to 7i78 then.

  From: andy pugh 
 To: adit bhargava  
Cc: Enhanced Machine Controller (EMC) 
 Sent: Friday, April 22, 2016 4:50 PM
 Subject: Re: [Emc-users] Need to add a faster thread base-thread with 100 
microseconds, Compilation changes required !!!
   
On 22 April 2016 at 15:43, adit bhargava  wrote:
> Does this mean that if I redirect the PWM output to 5i25 GPIO pin(after
> disabling the stepgen),
> the PWM signal will be forwarded to 7i76 also ?

No, the 5i25 pins currently associated with the highest-numbered
stepgen are hard-wired to the port that you (probably) have the 7i78
connected to.
Though you could swap the 7i78 and 7i76 ports.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

  
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Re: [Emc-users] Blacklisting parts of G-code

[Jon Elson]

On 04/22/2016 04:16 AM, andy pugh wrote:
> On 22 April 2016 at 01:02, Danny Miller  wrote:
>> RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92 G94 G97 G98
>>
>> Sure.  And I do.  But I don't train people to reboot LinuxCNC every time
>> they start, and I don't plan to.
> One useful addition to the system might be a "reset defaults" physical
> button on the panel somewhere. That could be linked to an MDI_COMMAND
> that resets all offsets etc.
You could have a stock "reset" program, maybe called 
reset.ngc, in the cncprogs directory.
Just tell people to always run this before starting 
something new.

Jon

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Re: [Emc-users] Blacklisting parts of G-code

[Dave Cole]

I think that is what most people do.   They set the most common settings 
preemptively via  a Gcode header of one or several lines.
That seems to work for most of the machines I have setup.
Then if they fat finger something, and the machine operates incorrectly, 
usually reloading the file corrects the issue.

For newbies, encourage them to dry run the machine without the 
workpiece.  Cutting air is cheap.

Still, we are talking about Idiot Proofing the machine and everyone 
knows that is a fairly hopeless endeavor.
Once an idiot has been identified, remove him!

Some people should not be allowed to drive and some people should not be
allowed to run machine tools!

Dave

On 4/21/2016 11:03 PM, Todd Zuercher wrote:
> Beginning all files with a proper and relatively save preamble, can  > go a 
> long way towards preventing most such problems. > > - 
Original Message - From: "Danny Miller" >  To: 
"emc-users@lists.sourceforge.net >> > Enhanced Machine Controller (EMC)" 
 > Sent: Thursday, April 21, 2016 
8:02:23 PM Subject: [Emc-users] > Blacklisting parts of G-code > > We're 
running a manual-toolchange CNC router in an open shop with > beginner 
users.  From Day 1, some things I thought would never happen >  somehow 
happened. > > Someone somehow set G64 Path Blending, and to a very high 
value, > rounding off all the cuts. > > Someone managed to set Tool 
Length Offset, which makes no sense on a >  manual toolchanger.   This 
left the machine screwed up all day. > > Really there's no point in 
these existing.  Now I KNOW I can reset > this stuff at startup: > > 
RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92 G94 > G97 
G98 > > Sure.  And I do.  But I don't train people to reboot LinuxCNC 
every > time they start, and I don't plan to. > > It is possible to 
reconfigure so these commands CAN'T have any > effect? e.g. someone 
mistypes "G64 P100" but it just gets ignored and > raises an error 
message? > > I could have a second profile around that allows these 
commands, just > in case someone DID have a use for them. > > Danny > > 
-- 
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Re: [Emc-users] Question on DM860 stepper drivers

[Dave Cole]

On 4/21/2016 10:05 PM, Gene Heskett wrote:
> On Thursday 21 April 2016 18:59:36 andy pugh wrote:
>
>> On 21 April 2016 at 23:45, Gene Heskett  wrote:
>>> Are there such beasts available, perhaps in a .750" or 20mm bore?
>>> What I've found didn't have the stroke.
>> Bicycle pump? :-)
> I haven't seen one of those in 50 years on this side of the pond. :(
> I assume you are refering to the pumps that used to live in clips on one
> of the connector pipes from the crank hub to the steering head?
>
> Cheers, Gene Heskett

I think that Harbor Freight may still sell them.   The frame mounted 
pumps are still available.
Ebay is  a great source for Bimba type cylinders as well.   Some of them 
have very low drag pistons.
They would make great balance cylinders if you have a big enough 
pipe/hose connecting the cylinder to the reservoir.
Don't overlook the regular air cylinders also, particularly the oil free 
ones that SMC and Festo sell.

Dave

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Re: [Emc-users] Blacklisting parts of G-code

[BRIAN GLACKIN]

I rarely chime in as I am a novice on this list, but the engineering side
of me enjoys all the discussions.

Having a tool like your CNC router is a great addition to the open
community shop.  I would love to have access to a shop like yours in my
community.  But as you have found, the law of unintended consequences  is
coming quickly into play.  Without setting some rather straightforward and
strict protocols for "novices that have no lifetime commitment to CNC" can
result in screwed up settings as you have found already or lead to serious
injury or worse.

I would hate to see someones failure to take basic precautions (because you
were not there to watch/mentor/guide) leading to the removal of the tool or
closing of this community asset due to a novice's failure to follow
established rules.

just my 2c.


On Fri, Apr 22, 2016 at 12:15 AM, Danny Miller  wrote:

> It's an open-membership community shop.  A lot of people come with only
> one or two projects as a goal, not a lifetime commitment to a CNC
> career.  And they want to be the one to use the machine.
>
> Some have used the Shopbot without problems, yet ran into stuff pretty
> quickly with LinuxCNC here.  Not too familiar with Shopbot but it seems
> to be more basic and doesn't throw more complicated concepts into it.
> Nobody I know uses tool radius compensation, CAM is entirely what works
> that out.
>
> I can only "train" people so much.  I don't have control over their
> toolpath generation, so dictating preambles really isn't gonna happen.
> Not saying preambles don't make a lot of sense.
>
> Well, we found a problem tonight- the guy's copy of Vectric Aspire, when
> you select a "linuxcnc" target, generated this:
>
> G43.1Z1.7
>
> 1.7 was listed as the safe-z height.  There's no reason I can see to put
> that into incremental Tool Offset.
>
> So then- get this- we selected "linuxcnc ARC" instead, whose only
> difference is supposed to be that circular arcs are made with G2/G3 arcs
> instead of many linear points.  Lo and behold, the G43.1 command did NOT
> end up in the output file.  Tried it several times.  Wouldn't believe it
> if I hadn't seen it.
>
> Danny
>
> On 4/21/2016 7:57 PM, Bruce Layne wrote:
> > This sounds a bit more like a philosophical question than a technical
> > question.  On one end of the spectrum are machinists, and part loading
> > monkeys are on the other end of the spectrum.  We're all somewhere on
> > that spectrum, and that's fine, as long as we operate within our
> > abilities.  It seems that your problem is that machine operators are not
> > operating within their abilities.  Maybe that's a training issue.  If
> > training doesn't work, maybe take away their keyboards and give the
> > operators a jog pendent and a user interface with CYCLE START,
> > PAUSE/RESUME, CYCLE STOP and EMERGENCY STOP.
> >
> > More to your inquiry, there are some tips and tricks that can help, but
> > not completely cure the problem you described.
> >
> > You should be able to set the privileges for each G code file or G code
> > directory so the operator can read but not write over the existing file.
> >
> > It's a good practice to have a line at the start of each G code program
> > that's similar to the startup code you listed, so every time the G code
> > is executed, it returns the machine to a known condition that is fully
> > determined so the program operates the same each time it's run.
> >
> > I'm sure others will chime in with useful suggestions, but there is no
> > such thing as foolproof.  As a manufacturing engineer, I long ago
> > learned to never underestimate the creativity and perseverance of a
> > determined fool.
> >
> > You could also post the following sign on each machine:
> >
> >  *ACHTUNG!*
> >  ALLES TURISTEN UND NONTEKNISCHEN LOOKENPEEPERS!
> >  DAS KOMPUTERMASCHINE IST NICHT FÜR DER GEFINGERPOKEN UND
> >  MITTENGRABEN! ODERWISE IST EASY TO SCHNAPPEN DER SPRINGENWERK,
> >  BLOWENFUSEN UND POPPENCORKEN MIT SPITZENSPARKEN.
> >  IST NICHT FÜR GEWERKEN BEI DUMMKOPFEN. DER RUBBERNECKEN SIGHTSEEREN
> >  KEEPEN DAS COTTONPICKEN HÄNDER IN DAS POCKETS MUSS.
> >  ZO RELAXEN UND WATSCHEN DER BLINKENLICHTEN.
> >
> >
> > https://en.wikipedia.org/wiki/Blinkenlights
> >
> > Good luck!
> >
> >
> >
> > On 04/21/2016 08:02 PM, Danny Miller wrote:
> >> We're running a manual-toolchange CNC router in an open shop with
> >> beginner users.  From Day 1, some things I thought would never happen
> >> somehow happened.
> >>
> >> Someone somehow set G64 Path Blending, and to a very high value,
> >> rounding off all the cuts.
> >>
> >> Someone managed to set Tool Length Offset, which makes no sense on a
> >> manual toolchanger.   This left the machine screwed up all day.
> >>
> >> Really there's no point in these existing.  Now I KNOW I can reset this
> >> stuff at startup:
> >>
> >> RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92 G94 G97
> G98
> >>
> >> Sure.  And I do.  But I don't train peop

Re: [Emc-users] Gantry Component

[Dave Cole]

That would be very appreciated!  :-)

Dave

On 4/22/2016 9:59 AM, John Thornton wrote:
> Finally guessed enough times to get it working... now to document it all.
>
> JT
>
> On 4/22/2016 8:30 AM, John Thornton wrote:
>> The switches were reversed but setting them correct and I still get the
>> limit error.
>>
>> JT
>>
>> On 4/22/2016 7:14 AM, Sarah Armstrong wrote:
>>> yea that would account for it
>>>
>>> On 22 April 2016 at 13:03, John Thornton  wrote:
>>>
 Hi Sarah,

 I'm thinking this morning that I might have the switches crossed so
 motor 0 is hitting the switch for motor 1. We will see in a bit.

 JT

 On 4/22/2016 4:21 AM, Sarah Armstrong wrote:
> re:gantry John ,.
>
> i'm guessing by the state number and error , that your second Y axis ,may
> well have hit the limit switch, before the the logic switches between the
> Y1 & Y2
> so it sees the Y1 limit as hit , when it should be homing . so for me a
> slight change in the logic needed , i./e home the second Y2 before
> switching to Limit mode
>
> so and Y1 & Y2 first , need another look and setup a machine here i think
>
>
>
> On 22 April 2016 at 00:48, John Thornton  wrote:
>
>> I have the gantry moving but homing fails with hit limit in home state 7
>> and joint 1 on limit switch
>>
>> http://gnipsel.com/files/emc/Gantry.zip
>>
>> JT
>>
>> On 4/21/2016 2:50 PM, John Thornton wrote:
>>> I'm trying to understand the gantry component and I've almost got it
>>> working but not quite. Both Y motors spin but are slow to spin up then
>>> they don't stop... I assume I'm missing some part of the big picture.
>>> The config is located here:
>>>
>>> http://gnipsel.com/files/emc/Gantry/
>>>
>>> What I did was take the config from the forum and tried to understand
>>> the chain of motion for the two motors...
>>>
>>> JT
>>>
>>>
>>>
 --
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 and
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>> of
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Re: [Emc-users] Gantry Component

[John Thornton]

Well it worked for a bit then broke then I learned more about it...

JT

On 4/22/2016 11:03 AM, Dave Cole wrote:
> That would be very appreciated!  :-)
>
> Dave
>
> On 4/22/2016 9:59 AM, John Thornton wrote:
>> Finally guessed enough times to get it working... now to document it all.
>>
>> JT
>>
>> On 4/22/2016 8:30 AM, John Thornton wrote:
>>> The switches were reversed but setting them correct and I still get the
>>> limit error.
>>>
>>> JT
>>>
>>> On 4/22/2016 7:14 AM, Sarah Armstrong wrote:
 yea that would account for it

 On 22 April 2016 at 13:03, John Thornton  wrote:

> Hi Sarah,
>
> I'm thinking this morning that I might have the switches crossed so
> motor 0 is hitting the switch for motor 1. We will see in a bit.
>
> JT
>
> On 4/22/2016 4:21 AM, Sarah Armstrong wrote:
>> re:gantry John ,.
>>
>> i'm guessing by the state number and error , that your second Y axis ,may
>> well have hit the limit switch, before the the logic switches between the
>> Y1 & Y2
>> so it sees the Y1 limit as hit , when it should be homing . so for me a
>> slight change in the logic needed , i./e home the second Y2 before
>> switching to Limit mode
>>
>> so and Y1 & Y2 first , need another look and setup a machine here i think
>>
>>
>>
>> On 22 April 2016 at 00:48, John Thornton  wrote:
>>
>>> I have the gantry moving but homing fails with hit limit in home state 7
>>> and joint 1 on limit switch
>>>
>>> http://gnipsel.com/files/emc/Gantry.zip
>>>
>>> JT
>>>
>>> On 4/21/2016 2:50 PM, John Thornton wrote:
 I'm trying to understand the gantry component and I've almost got it
 working but not quite. Both Y motors spin but are slow to spin up then
 they don't stop... I assume I'm missing some part of the big picture.
 The config is located here:

 http://gnipsel.com/files/emc/Gantry/

 What I did was take the config from the forum and tried to understand
 the chain of motion for the two motors...

 JT



> --
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>>> Manager
 Applications Manager provides deep performance insights into multiple
>>> tiers of
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 ___
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> Manager
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>>> of
>>> your business applications. It resolves application problems quickly and
>>> reduces your MTTR. Get your free trial!
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>

Re: [Emc-users] Blacklisting parts of G-code

[Chris Albertson]

What you need is a g-code preprocessor.   Likely no more complex then
a shell script with
1) a few boiler plate lines of g-code to prepend to the file and 2) a
few "sed" commands to comment out lines that are not allowed.

Or the script rather then removing those lines might simply reject the
entire file.

Do this whenever a file is opened.

On Thu, Apr 21, 2016 at 5:02 PM, Danny Miller  wrote:
> We're running a manual-toolchange CNC router in an open shop with
> beginner users.  From Day 1, some things I thought would never happen
> somehow happened.
>
> Someone somehow set G64 Path Blending, and to a very high value,
> rounding off all the cuts.
>
> Someone managed to set Tool Length Offset, which makes no sense on a
> manual toolchanger.   This left the machine screwed up all day.
>
> Really there's no point in these existing.  Now I KNOW I can reset this
> stuff at startup:
>
> RS274NGC_STARTUP_CODE = G17 G20 G40 G49 G64 P0.001 G80 G90 G92 G94 G97 G98
>
> Sure.  And I do.  But I don't train people to reboot LinuxCNC every time
> they start, and I don't plan to.
>
> It is possible to reconfigure so these commands CAN'T have any effect?
> e.g. someone mistypes "G64 P100" but it just gets ignored and raises an
> error message?
>
> I could have a second profile around that allows these commands, just in
> case someone DID have a use for them.
>
> Danny
>
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[Emc-users] Semi OT: Heidenhain incremental encoders

[Leonardo Marsaglia]

Hello to all.

I'm about to buy a pair of encoders for my lathe and I need 5000 PPR.

These look really good and are also at a good price:

http://www.ebay.com/itm/Hiedenhain-Rotary-Encoder-5000ppr-ERN-471-/231921126389?hash=item35ff938bf5:g:vpwAAOSwqrtWoqxN

My doubt is that in the label it says TTL x25 wich I don't know what it
means. Is this a multiplication factor? Do I have to consider this to
address the 5000 PPR that I need?

Also, I was wondering if there's a big difference in using differential
encoders, because so far normal ones worked well for me, but sometimes I
get a little paranoid about noise issues.

Thanks as always for your help.

-- 
*Leonardo Marsaglia*.
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Re: [Emc-users] Semi OT: Heidenhain incremental encoders

[andy pugh]

On 22 April 2016 at 17:51, Leonardo Marsaglia
 wrote:
> My doubt is that in the label it says TTL x25 wich I don't know what it
> means. Is this a multiplication factor?

Heidenhain mainly do sin/cos encoders and one uses an interpolation
box to convert to TTL.
I suspect that these encoders have a built-in 25x interpolator to give
the 5000ppr.

The price looks great, especially including the fancy mounts.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is
designed for the especial use of mechanical geniuses, daredevils and
lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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Re: [Emc-users] Question on DM860 stepper drivers

[Gene Heskett]

On Friday 22 April 2016 11:59:09 Dave Cole wrote:

> On 4/21/2016 10:05 PM, Gene Heskett wrote:
> > On Thursday 21 April 2016 18:59:36 andy pugh wrote:
> >> On 21 April 2016 at 23:45, Gene Heskett  wrote:
> >>> Are there such beasts available, perhaps in a .750" or 20mm bore?
> >>> What I've found didn't have the stroke.
> >>
> >> Bicycle pump? :-)
> >
> > I haven't seen one of those in 50 years on this side of the pond. :(
> > I assume you are refering to the pumps that used to live in clips on
> > one of the connector pipes from the crank hub to the steering head?
> >
> > Cheers, Gene Heskett
>
> I think that Harbor Freight may still sell them.   The frame mounted
> pumps are still available.

I'll tyake a look, thanks.

> Ebay is  a great source for Bimba type cylinders as well.   Some of
> them have very low drag pistons.
> They would make great balance cylinders if you have a big enough
> pipe/hose connecting the cylinder to the reservoir.

I have explored that mentally, and came to the conclusion that the air 
moveing back and forth would need to be passed thru a pressurized 
reservoir so that it had to bubble thru the oil at least when it was 
returning to the cylinder in order to carry an occasional drop of oil 
mist to the cylinder.  But I am not convinced that could be achieved 
without some reed valve contraptions to do the steering.  It certainly 
would seem to be something to investigate, particularly after the first 
cyclinder failed from an adequate level of lubrication.  The gas springs 
would seem to be usable, until the restrictions on the rapids are 
concerned.  That, and in a constant motion situation as opposed to just 
getting the grocery's out of the car a couple times week would certainly 
expose the failure mechanisms, which in my experience is a gradual loss 
of pressure I surmise is deteriorated sealing ballons in those things.

> Don't overlook the regular air cylinders also, particularly the oil
> free ones that SMC and Festo sell.

Two more search terms to add to the google/fleabay searches, thanks.

One of the things that is pushing me toward the springs is that they are 
under tension and will essentially maintain a straight line between the 
upper idler pulley's & back down to the anchor points.  The pressure 
cylinders OTOH are always pushing, subjected by bumping to micro bends 
that would destroy them over the longer haul just as its a failure 
mechanism in those used as lid lifters in the auto industry.

The variability of the springs should not be a huge problem if they are 
operating in the stretch length range that assures they are still well 
stretched at their minimum length in service. As long as the maxumum 
length in service does not exceed the maximum length the spring can be 
pulled out to without a permanent stetching. I have been pleasantly 
surprised by how far the common screen door spring can be stretched. I 
have exceeded 4 feet without apparent damage.  So I would have I think a 
decent amount of support starting from an anchor on the back wall of the 
base cabinet, up over a couple of pulleys on brackets on the top of the 
motor and back down to a spot on the lower end of the carriage slider.  
One on each side in this case.  With the $5 pulleys flanges only being 
3/8" wide at the outer edges of the flanges, if I have to move to bigger 
springs, it would make sense to make some catcher pieces to prevent a 
spring from rolling off that narrow a flange.

The thought also crossed my mind to see if I could chuck the pulley 
somehow, and with a ball bearing in the toolpost, roll that flange wider 
to reduce that potential for a whap in the face. :)

But first I have to see if I can get this 7x12 back into serviceable 
condition since the chatter that broke the carbide chips also unscrewed 
the home made housing over the motor, which itself contains all the 
motor driver stuffs.  I think I will be forced to drill & tap more holes 
in the back edge of the bed under the headstock, 2 weren't enough.

BTW, craigslist bombed on a lathe search, $2000 for a South Bend 14x30 
that had to be at least 80 years old, huge motor on a carraige 2 feet 
above the spindle shaft, and an almost skeletal looking headstock and 
bed.  Probably babbit spindle bearings to boot.  Nope.  Theres a 100+ yo 
Porter right here in town, 16x72 or such, sitting out in the weather for 
at least 3 years that I know of. Babbit bearings with a need for about 
1/8 inch in shim washers to take up the end play. Motor apparently 
failed and thrown away (or sold) at some point in the dustbin of 
history. $500.  He says the scrap iron is worth that but if so, why 
hasn't he recycled it? But while it all still moves, just the screws to 
ball screw it would probably be north of $1500.  And its as much too big 
for me as this 7x12 is too small.

> Dave

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdersh

Re: [Emc-users] Question on DM860 stepper drivers

[Todd Zuercher]

Oh well, worth a look.  Craigslist searches are nice that they are relatively 
local.  The down side, if your local isn't suited for the search you won't find 
much.
Around here there usually are a few decent things to look at.
https://akroncanton.craigslist.org/hvo/5507436260.html


- Original Message -
From: "Gene Heskett" 
To: emc-users@lists.sourceforge.net
Sent: Friday, April 22, 2016 1:20:40 PM
Subject: Re: [Emc-users] Question on DM860 stepper drivers

BTW, craigslist bombed on a lathe search, $2000 for a South Bend 14x30 
that had to be at least 80 years old, huge motor on a carraige 2 feet 
above the spindle shaft, and an almost skeletal looking headstock and 
bed.  Probably babbit spindle bearings to boot.  Nope.  Theres a 100+ yo 
Porter right here in town, 16x72 or such, sitting out in the weather for 
at least 3 years that I know of. Babbit bearings with a need for about 
1/8 inch in shim washers to take up the end play. Motor apparently 
failed and thrown away (or sold) at some point in the dustbin of 
history. $500.  He says the scrap iron is worth that but if so, why 
hasn't he recycled it? But while it all still moves, just the screws to 
ball screw it would probably be north of $1500.  And its as much too big 
for me as this 7x12 is too small.

> Dave

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Question on DM860 stepper drivers

[Gene Heskett]

On Friday 22 April 2016 13:41:33 Todd Zuercher wrote:

> Oh well, worth a look.  Craigslist searches are nice that they are
> relatively local.  The down side, if your local isn't suited for the
> search you won't find much.

Thats true, so I expanded my search earlier but misseed this one because 
of the poor pix & lacking description details.  So I've sent that poster 
an email for clarification.  We'll see what response I get.

Thanks Todd.

> Around here there usually are a few decent 
> things to look at.
> https://akroncanton.craigslist.org/hvo/5507436260.html

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] Gantry Component

[John Thornton]

https://www.youtube.com/watch?v=wgNLd6A34Vo

On 4/22/2016 11:16 AM, John Thornton wrote:
> Well it worked for a bit then broke then I learned more about it...
>
> JT
>
> On 4/22/2016 11:03 AM, Dave Cole wrote:
>> That would be very appreciated!  :-)
>>
>> Dave
>>
>> On 4/22/2016 9:59 AM, John Thornton wrote:
>>> Finally guessed enough times to get it working... now to document it all.
>>>
>>> JT
>>>
>>> On 4/22/2016 8:30 AM, John Thornton wrote:
 The switches were reversed but setting them correct and I still get the
 limit error.

 JT

 On 4/22/2016 7:14 AM, Sarah Armstrong wrote:
> yea that would account for it
>
> On 22 April 2016 at 13:03, John Thornton  wrote:
>
>> Hi Sarah,
>>
>> I'm thinking this morning that I might have the switches crossed so
>> motor 0 is hitting the switch for motor 1. We will see in a bit.
>>
>> JT
>>
>> On 4/22/2016 4:21 AM, Sarah Armstrong wrote:
>>> re:gantry John ,.
>>>
>>> i'm guessing by the state number and error , that your second Y axis 
>>> ,may
>>> well have hit the limit switch, before the the logic switches between 
>>> the
>>> Y1 & Y2
>>> so it sees the Y1 limit as hit , when it should be homing . so for me a
>>> slight change in the logic needed , i./e home the second Y2 before
>>> switching to Limit mode
>>>
>>> so and Y1 & Y2 first , need another look and setup a machine here i 
>>> think
>>>
>>>
>>>
>>> On 22 April 2016 at 00:48, John Thornton  wrote:
>>>
 I have the gantry moving but homing fails with hit limit in home state 
 7
 and joint 1 on limit switch

 http://gnipsel.com/files/emc/Gantry.zip

 JT

 On 4/21/2016 2:50 PM, John Thornton wrote:
> I'm trying to understand the gantry component and I've almost got it
> working but not quite. Both Y motors spin but are slow to spin up then
> they don't stop... I assume I'm missing some part of the big picture.
> The config is located here:
>
> http://gnipsel.com/files/emc/Gantry/
>
> What I did was take the config from the forum and tried to understand
> the chain of motion for the two motors...
>
> JT
>
>
>
>> --
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 Manager
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 tiers of
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Re: [Emc-users] Question on DM860 stepper drivers

[Dave Cole]

On 4/22/2016 2:02 PM, Gene Heskett wrote:
> On Friday 22 April 2016 13:41:33 Todd Zuercher wrote:
>
>> Oh well, worth a look.  Craigslist searches are nice that they are
>> relatively local.  The down side, if your local isn't suited for the
>> search you won't find much.
> Thats true, so I expanded my search earlier but misseed this one because
> of the poor pix & lacking description details.  So I've sent that poster
> an email for clarification.  We'll see what response I get.
>
> Thanks Todd.
>
>> Around here there usually are a few decent
>> things to look at.
>> https://akroncanton.craigslist.org/hvo/5507436260.html
> Cheers, Gene Heskett

Wow!  Those are bad pictures!

I think all of the latest Festo and SMC cylinders are oil free 
cylinders.   They require zero oil to function.
I was skeptical of this when they first came out years ago, but they 
will run thousands and thousands of cycles with zero oil lube.
I think that some if not most of the newer Bimba cylinders are oil free 
as well.

For instance
http://www.bimba.com/Products-and-Cad/Actuators/Inch/Round-Line/Non-Repairable/Original-Line-Cylinder/

I suppose if you use oil then it will wash out the grease.

Dave


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Re: [Emc-users] Question on DM860 stepper drivers

[Gene Heskett]

On Friday 22 April 2016 14:46:19 Dave Cole wrote:

> On 4/22/2016 2:02 PM, Gene Heskett wrote:
> > On Friday 22 April 2016 13:41:33 Todd Zuercher wrote:
> >> Oh well, worth a look.  Craigslist searches are nice that they are
> >> relatively local.  The down side, if your local isn't suited for
> >> the search you won't find much.
> >
> > Thats true, so I expanded my search earlier but misseed this one
> > because of the poor pix & lacking description details.  So I've sent
> > that poster an email for clarification.  We'll see what response I
> > get.
> >
> > Thanks Todd.
> >
> >> Around here there usually are a few decent
> >> things to look at.
> >> https://akroncanton.craigslist.org/hvo/5507436260.html
> >
> > Cheers, Gene Heskett
>
> Wow!  Those are bad pictures!
>
> I think all of the latest Festo and SMC cylinders are oil free
> cylinders.   They require zero oil to function.
> I was skeptical of this when they first came out years ago, but they
> will run thousands and thousands of cycles with zero oil lube.
> I think that some if not most of the newer Bimba cylinders are oil
> free as well.
>
> For instance
> http://www.bimba.com/Products-and-Cad/Actuators/Inch/Round-Line/Non-Re
>pairable/Original-Line-Cylinder/
>
> I suppose if you use oil then it will wash out the grease.
>
> Dave
>
>
looks like Bimba doesn't want my business.  I used the menu to compose a 
3/4" cyclinder with a 16" stroke & asked for a quote on 2 of them.  The 
reply was generic boilerplate without any prices.  oh, well.

I did get the lathe back among the living this afternoon and made one 
more of the spring anchors.  In the process I was out of the gold 
colored chips for the turning tool so I installed one from a pack of 
Mitsubishi's I got after a very long shipping delay, from grizzly.  

Different edge shape and not 100% covered in the golden shaded coating, 
and it took a bit more push from the x motor to start cutting.  So I set 
it to take .025", at 700 revs and about 2.4 ipm.  It proceeded to peel 
off some of the longest, prettiest curly-que chips I've ever seem, coils 
about 3/32" in diameter and about 1/8" per turn and if I could keep it 
from getting tangled up, 10 foot long single chips were doable.  I have 
never had a carbide tool cut like that before. So I went -0.035" for the 
next cut.  Wash, rinse, repeat. -0.050 made the motor work a little 
harder, but it just kept going.  So I ought to be able to make the last 
2 tomorrow.  I have some steel formed angle to make the pulley supports 
from, but I've about a week to make the last 2 anchors before I'll have 
the motor to measure for the pulley support mounting.

The line powered driver is about a week behind the motor according to the 
shipping notices.

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Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] hands-on EDM experience

[Thomas Powderly]

Hi Nicklas
the distance of the initiation is not the distance of the discharge
that is:
the distance of the initition is Less Than Or Equal to a value
the distance of the discharge is not dependant on the distance of the 
intiation,
and is usally much closer.
in real work the tool is already at the discharge distance when the 
initiation voltage is turned on
so the initiation still occurs, followed by the discharge
the equations for the distance are beyond me because it is not simply 
ohms law
as the discharge is a plasma and the gap is not a resistor, but a 'reactor'

and
.75 amps never bothered me, that measure is of the supplied current,
( the current that would be delivered in a dead short)
  which is much more than delivered current
( the gap reactance again, so i have no formula,
tho there are math models available on the interweb)

tomp

On 04/22/16 22:29, Nicklas Karlsson wrote:
> .75 amps is very dangerous as soon as voltage is high enough. Low current and 
> it should not be dangerous even for rather high voltage.
>
> Preferably I want to stay at low current at least until prototype leave 
> desktop.
>
> Since dielectric breakdown strength only has volts and distance I guess volt 
> should be adjusted so that ionization is not started at to long distance 
> which would create a big crater.
>
> I however want to keep current low to stay safe but does the current change 
> how large a channel is created or will it grow large enough anyway as soon as 
> the real current start?
>
>
> Regards Nicklas Karlsson
>
>
>
>
> On Thu, 21 Apr 2016 22:03:32 +0800
> Thomas Powderly  wrote:
>
>> initiation ONLY depends on voltage
>> i use .75 amps and its overkill
>> but it was easy to make the circuit
>> the equation for dielectric breakdown strength only has volts and distance
>> but
>> higher voltage makes ionization easier
>> typical value are 100 to 300VDC
>> tho for some paarungs ( stahl bis stahl, copper to crystal ... ) upwards
>> of 1000V= are used
>> hth tomp
>>
>> On 04/21/16 20:13, Nicklas Karlsson wrote:
>>> I certainly discovered the need to back off.
>>>
>>> As is now I use only 10mA for ionization and 10A for cuts. I want to keep 
>>> ionization current down for safety reason, do you know if it is harder to 
>>> get process running at low current?
>>>
>>> Regards Nicklas Karlsson
>>>
>>>
>>>
>>> On Thu, 17 Mar 2016 15:15:10 + (UTC)
>>> Pete_Gruendeman  wrote:
>>>
 Hi Nicklas:
   Did you set up and run the simple RC type EDM?  It's a pretty simple 
 proposition, using a filtered DC power supply, a capacitor in parallel 
 with the gap and the gap itself.  An electrolytic capacitor would work.  A 
 motor-run capacitor, of 50-100 micro Farads would work even better.  
 Hands-on experience will answer many of you questions, especially in 
 regard to the stability of the process.  No matter how stable your process 
 is, backing up is part of this artform.

 Pete
 
 On Thu, 3/10/16, Nicklas Karlsson  wrote:

Subject: Re: hands-on EDM experience
To: "Pete_Gruendeman" 
Date: Thursday, March 10, 2016, 8:49 AM

> Hi Nicklas:
> I wrote and sent this last
night but it seems to have bounced instead of reaching
you.  I want you to get some hands on experience with EDM,
even if it's a simple RC type EDM that you clamp onto a
milling machine and flush with a turkey baster you borrow
from the kitchen.  Even though I had run commercial EDMs,
it was eye opening to run the process manually.  The whole
process can be complicated but it doesn't have to be.
Read below.
>
> Hi
tomp and Nicklas:
>
   Careful tomp as much of what you wrote is some
pretty technical stuff.  It might be over Nicklas' head
since he is new to EDM.  I barely recognize some of this
but do recall that Agie offered auto-overcut compensation.
I always turned that off as much of my work was something
like a horizontally oriented cylinder and I typically
orbited about the X-axis.
>
> Nicklas:  Have you done
anything with EDM yet?, even with a simple resistive
capacitive spark eroder?, perhaps set up on a milling
machine or other platform?  And I don't mean CNC.  I
mean with control being provided by your ears and your
hands.  And flushing with a baster from the kitchen.  Much
of the discussion here will make more sense if you have even
a little hands-on experience with EDM.  Being a beginner is
fine.  I really want you to know instinctively what a
stable burn sounds like, and what gap contamination looks
like, sounds like and how quickly you need to do something
about it when the burn starts to become unstable.  These
various hands-on s

[Emc-users] Affordable, used lathes Re: Question on DM860 stepper drivers

[Gregg Eshelman]

I'll second on Craigslist. I've found, and sold, several lathes on there. Check 
first in the list that's closest to you. You can search the whole USA with 
adhuntr.com
My Monarch 12CK was saved from a scrapyard for $400, then I had to spend more 
than that getting a tailstock and a couple of handles from a guy with a 12 that 
had a broken gearbox. He'd had it on eBay for ages, trying to get $3500. I 
finally convinced him nobody was going to buy a broken Monarch, his best bet 
would be parting it out. He finally agreed, I got dibs on what I needed and in 
a couple of weeks there wasn't much left except the bed.
Same story on a 17x78 LeBlond 'trainer'. I got it cheap at an auction, my first 
LeBlond. I figured there were many thousands of them made in the 40's parts 
should be plentiful. WRONG! Finally located a shorter on on eBay, bet totally 
worn out. $3500. Seller even put on pictures showing the massive amount of bed 
wear. Finally realizing that nobody was buying a LeBlond with a shot bed and 
saddle, and someone else desperately wanted the headstock, I got all the parts 
I was missing - then sold the complete and working lathe to a guy who works on 
Caterpillars. He needed a lathe long enough to handle the axle shafts.
So don't buy any LeBlond or Monarch with broken or missing parts. Except 
perhaps a 10EE. There's plenty of those laying about in all kinds of  
sub-functional condition.
 
  From: Todd Zuercher 
 To: Enhanced Machine Controller (EMC)  
 Sent: Friday, April 22, 2016 5:49 AM
 Subject: Re: [Emc-users] Question on DM860 stepper drivers
   
Air cylinders can be had for much cheaper off ebay.  The Mcmaster link was more 
for showing what's avalible.

I'd be concerned about a bycycle pumps seals holding up over time, especially 
if pressures exceed 70-80 psi.

Cheap used iron often can be found easier off of Craigslist than fleabay.

- Original Message -
From: "Gene Heskett" 
To: emc-users@lists.sourceforge.net
Sent: Friday, April 22, 2016 5:32:46 AM
Subject: Re: [Emc-users] Question on DM860 stepper drivers

On Thursday 21 April 2016 23:29:21 Todd Zuercher wrote:

> What length stroke do you need? McMasterCarr has 3/4" cylinders in
> lengths up to 24".  (1-1/16" up to 36")
> http://www.mcmaster.com/#standard-air-cylinders/=12348ld

Those prices aren't friendly enough though. I can rig springs for half 
that.  But its looking like I'll have to make the springs anchors on the 
mill as I've pretty much had it with this 7x12, the rear gib strips 
vibrated loose yesterday and chomped up about $30 worth of carbide 
inserts from the chatter just making one of the 4 I needed last 
afternoon.

I am in the market for a bigger, more iron in its ass lathe, but 
fleabay's lathe selections are in a high vacuum suckage state when I 
searched last night.  One boxter? and one Monarch about covered what was 
available for under $1500.  From the pix, neither had been taken care of 
and were missing parts. Quite a bit of new stuff, all priced higher than 
I could get it from Bolton or grizzly.  Something in the 10x30 range I 
can convert might be attractive. Both of those 2 are within a long days 
drive from me, but neither adv listed the weight. And I know monarchs 
are at least capable of putting my GMC down on its snubbers.
   
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Re: [Emc-users] Affordable, used lathes Re: Question on DM860 stepper drivers

[Gene Heskett]

On Saturday 23 April 2016 00:50:21 Gregg Eshelman wrote:

> I'll second on Craigslist. I've found, and sold, several lathes on
> there. Check first in the list that's closest to you. You can search
> the whole USA with adhuntr.com My Monarch 12CK was saved from a
> scrapyard for $400, then I had to spend more than that getting a
> tailstock and a couple of handles from a guy with a 12 that had a
> broken gearbox. He'd had it on eBay for ages, trying to get $3500. I
> finally convinced him nobody was going to buy a broken Monarch, his
> best bet would be parting it out. He finally agreed, I got dibs on
> what I needed and in a couple of weeks there wasn't much left except
> the bed. Same story on a 17x78 LeBlond 'trainer'. I got it cheap at an
> auction, my first LeBlond. I figured there were many thousands of them
> made in the 40's parts should be plentiful. WRONG! Finally located a
> shorter on on eBay, bet totally worn out. $3500. Seller even put on
> pictures showing the massive amount of bed wear. Finally realizing
> that nobody was buying a LeBlond with a shot bed and saddle, and
> someone else desperately wanted the headstock, I got all the parts I
> was missing - then sold the complete and working lathe to a guy who
> works on Caterpillars. He needed a lathe long enough to handle the
> axle shafts. So don't buy any LeBlond or Monarch with broken or
> missing parts. Except perhaps a 10EE. There's plenty of those laying
> about in all kinds of  sub-functional condition.

Confirmed by looking at a lot of pix, Todd. Its all too often obviously a 
half parted out machine in many cases, and they still want $3 a lb for 
what's essentially scrap metal to be tossed in the furnace for tomorrows 
pour.  Discourageing is the effect on me.  

>   From: Todd Zuercher 
>  To: Enhanced Machine Controller (EMC)
>  Sent: Friday, April 22, 2016 5:49 AM
>  Subject: Re: [Emc-users] Question on DM860 stepper drivers
>
> Air cylinders can be had for much cheaper off ebay.  The Mcmaster link
> was more for showing what's avalible.
>
> I'd be concerned about a bycycle pumps seals holding up over time,
> especially if pressures exceed 70-80 psi.
>
> Cheap used iron often can be found easier off of Craigslist than
> fleabay.
>
> - Original Message -
> From: "Gene Heskett" 
> To: emc-users@lists.sourceforge.net
> Sent: Friday, April 22, 2016 5:32:46 AM
> Subject: Re: [Emc-users] Question on DM860 stepper drivers
>
> On Thursday 21 April 2016 23:29:21 Todd Zuercher wrote:
> > What length stroke do you need? McMasterCarr has 3/4" cylinders in
> > lengths up to 24".  (1-1/16" up to 36")
> > http://www.mcmaster.com/#standard-air-cylinders/=12348ld
>
> Those prices aren't friendly enough though. I can rig springs for half
> that.  But its looking like I'll have to make the springs anchors on
> the mill as I've pretty much had it with this 7x12, the rear gib
> strips vibrated loose yesterday and chomped up about $30 worth of
> carbide inserts from the chatter just making one of the 4 I needed
> last afternoon.
>
> I am in the market for a bigger, more iron in its ass lathe, but
> fleabay's lathe selections are in a high vacuum suckage state when I
> searched last night.  One boxter? and one Monarch about covered what
> was available for under $1500.  From the pix, neither had been taken
> care of and were missing parts. Quite a bit of new stuff, all priced
> higher than I could get it from Bolton or grizzly.  Something in the
> 10x30 range I can convert might be attractive. Both of those 2 are
> within a long days drive from me, but neither adv listed the weight.
> And I know monarchs are at least capable of putting my GMC down on its
> snubbers.
>
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> Find and fix application performance issues faster with
> Applications Manager Applications Manager provides deep performance
> insights into multiple tiers of your business applications. It
> resolves application problems quickly and reduces your MTTR. Get your
> free trial!
> https://ad.doubleclick.net/ddm/clk/302982198;130105516;z
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> Emc-users@lists.sourceforge.net
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Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

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Re: [Emc-users] hands-on EDM experience

[Nicklas Karlsson]

On Sat, 23 Apr 2016 10:32:09 +0800
Thomas Powderly  wrote:

> ...
> in real work the tool is already at the discharge distance when the 
> initiation voltage is turned on
> so the initiation still occurs, followed by the discharge

I was thinking about this for the ionization voltage. Usually tool is already 
at the discharge distance but in case it is to far away ionization just a 
little bit above limit would prevent discharge from happen to far away.

> ...
> .75 amps never bothered me, that measure is of the supplied current,
> ( the current that would be delivered in a dead short)
>   which is much more than delivered current

It is the current delivered if I happen to touch tool that bother me, to high 
current and I wont be there to machine another day. There is a 
blue-green-yellow-red graph a bit down to the right on this page 
https://en.wikipedia.org/wiki/Electric_shock and I prefer to stay to the left 
of the yellow area.

> tomp

10mA seems to be enough for ionization although I will try higher later to 
check if it make a difference. Sparc distinguishing seems to work at if short 
circuited there is no current. I however have some problem to keep the process 
running manually.


Regards Nicklas Karlsson



> On 04/22/16 22:29, Nicklas Karlsson wrote:
> > .75 amps is very dangerous as soon as voltage is high enough. Low current 
> > and it should not be dangerous even for rather high voltage.
> >
> > Preferably I want to stay at low current at least until prototype leave 
> > desktop.
> >
> > Since dielectric breakdown strength only has volts and distance I guess 
> > volt should be adjusted so that ionization is not started at to long 
> > distance which would create a big crater.
> >
> > I however want to keep current low to stay safe but does the current change 
> > how large a channel is created or will it grow large enough anyway as soon 
> > as the real current start?
> >
> >
> > Regards Nicklas Karlsson
> >
> >
> >
> >
> > On Thu, 21 Apr 2016 22:03:32 +0800
> > Thomas Powderly  wrote:
> >
> >> initiation ONLY depends on voltage
> >> i use .75 amps and its overkill
> >> but it was easy to make the circuit
> >> the equation for dielectric breakdown strength only has volts and distance
> >> but
> >> higher voltage makes ionization easier
> >> typical value are 100 to 300VDC
> >> tho for some paarungs ( stahl bis stahl, copper to crystal ... ) upwards
> >> of 1000V= are used
> >> hth tomp
> >>
> >> On 04/21/16 20:13, Nicklas Karlsson wrote:
> >>> I certainly discovered the need to back off.
> >>>
> >>> As is now I use only 10mA for ionization and 10A for cuts. I want to keep 
> >>> ionization current down for safety reason, do you know if it is harder to 
> >>> get process running at low current?
> >>>
> >>> Regards Nicklas Karlsson
> >>>
> >>>
> >>>
> >>> On Thu, 17 Mar 2016 15:15:10 + (UTC)
> >>> Pete_Gruendeman  wrote:
> >>>
>  Hi Nicklas:
>    Did you set up and run the simple RC type EDM?  It's a pretty 
>  simple proposition, using a filtered DC power supply, a capacitor in 
>  parallel with the gap and the gap itself.  An electrolytic capacitor 
>  would work.  A motor-run capacitor, of 50-100 micro Farads would work 
>  even better.  Hands-on experience will answer many of you questions, 
>  especially in regard to the stability of the process.  No matter how 
>  stable your process is, backing up is part of this artform.
> 
>  Pete
>  
>  On Thu, 3/10/16, Nicklas Karlsson  wrote:
> 
> Subject: Re: hands-on EDM experience
> To: "Pete_Gruendeman" 
> Date: Thursday, March 10, 2016, 8:49 AM
> 
> > Hi Nicklas:
> > I wrote and sent this last
> night but it seems to have bounced instead of reaching
> you.  I want you to get some hands on experience with EDM,
> even if it's a simple RC type EDM that you clamp onto a
> milling machine and flush with a turkey baster you borrow
> from the kitchen.  Even though I had run commercial EDMs,
> it was eye opening to run the process manually.  The whole
> process can be complicated but it doesn't have to be.
> Read below.
> >
> > Hi
> tomp and Nicklas:
> >
>    Careful tomp as much of what you wrote is some
> pretty technical stuff.  It might be over Nicklas' head
> since he is new to EDM.  I barely recognize some of this
> but do recall that Agie offered auto-overcut compensation.
> I always turned that off as much of my work was something
> like a horizontally oriented cylinder and I typically
> orbited about the X-axis.
> >
> > Nicklas:  Have you done
> anything with EDM yet?, even with a simple resistive
> capacitive spark eroder?, perhaps set up on a milling
> machine or other platform?  And I don't