Re: [Emc-users] MesaNet cards free to good home

[Scott Harwell via Emc-users]

 
I will pay shipping.

 On Sunday, June 7, 2020, 09:56:52 PM CDT, Jon Elson 
 wrote:  
 
 On 06/07/2020 08:10 PM, Scott Harwell via Emc-users wrote:
>  How much for the cards? I'm wanting something to play with.
>
>
In the subject line :  FREE to good home.

Jon


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Re: [Emc-users] Working on Pendant and debouncer PCBs, comments welcome.

[TJoseph Powderly]

sorry that pic is not an hr33, this is

On Mon, Jun 8, 2020 at 11:02 AM Chris Albertson
 wrote:
>
> I am going to have JLPCB make some PCBs for me.  They cost only $2 each but
> DHL shipping from China is $25 so it makes sense to wait until I have
> several projects ready and give then a batch of designs.  They populate the
> board now for the price of the components, so it is a great deal.  They do
> all the SMT soldering for you.
>
> Two things might interest people here, a USB connected pendant and a
> hardware switch debouncer.
>
> The switch debouncer will handle 6 switches, it accepts a raw switch and
> outputs a reliably debounced signal.  It will use an RC lowpass filter and
> a 74HC014 Schmitt trigger. With an LED for each switch.  Yes, you can do
> the debounce in software but this will handle the noise with hardware.  I'm
> still deciding about connectors.  Screw terminals or JST?  Or both.
>
> The pendant is more complex and I'm not sure of the details but here are
> proposed features:
>
>- It will connect with USB.
>- There are three knobs.  All are of the continuous rotation type with
>A/B quadrature output.
>   - The main knob is a CNC "MPG" handwheel with 100 "clicks" per
>   revolution.
>   - The other two are much smaller with about 20 clicks per
>   revolution and also a push-button click operation, like on a car radio.
>   These two knobs replace the more common selector switches.
>   - There is a character-only LCD screen that can display four lines of
>text, 20 characters long
>- There are no labels printed on the front panel.  The current function
>of the two small knobs is displayed on the last line of the LCD
>
> The goal is first off a "clean look" with both low complexity and
> open-ended design.  I think using a character display and rotary controls
> does this.   This pendant could run a 6 axis robot arm or a lathe depending
> on the programming.
>
> *One question:Does a pendant need a "activate" button* on the side such
> that the controls are disabled if you don't hold the button down.  You
> don't want to jog a mill by accident if the wheel is bumped.
>
> I'm making this for myself but I'm designing this as if it were an actual
> product.   So I ask "What would be useful?
>
> I've decided I don't like the idea of a standard red E-Stop button because
> someone might confuse it with the hard-wired kind.  USB can not support
> that.  But I do want a way to quickly stop the machine.  I think pressing
> both small knobs at the same time will stop and re-set everything.  It will
> set the e-stop hal pin and reset the pendant to default.  (Yes e-stop could
> fail if there is a bug in the software)
>
> [image: Simple Pendant v2.jpg]
>
>
>
>
>
>
>
>
> Chris Albertson
> Redondo Beach, California
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Re: [Emc-users] Working on Pendant and debouncer PCBs, comments welcome.

[TJoseph Powderly]

Re pendant. The heidenhain controls use a box with strong magnets on rear.
Between the magnets is a deadman switch
(suitably runner dome covered for industrial use )
You can slap it onto any flat surface and the deaman is satisfied.
You can hold it in your hand,,, left hand... thumb on left side,
left forefinger on button, remaining fingers on right side.
On the front are keys and any lcd. On right is an estop
and a deeply dimpled wheel to turn an encoder for motion.
You put a fingertip in a dimple and lay a finger on the outside ribs,
the ribs give you a ergonomic detent very natural to use.
You can jog and handwheel as you like IF the deadman is satisfied.
hth
tomp

On Mon, Jun 8, 2020 at 11:02 AM Chris Albertson
 wrote:
>
> I am going to have JLPCB make some PCBs for me.  They cost only $2 each but
> DHL shipping from China is $25 so it makes sense to wait until I have
> several projects ready and give then a batch of designs.  They populate the
> board now for the price of the components, so it is a great deal.  They do
> all the SMT soldering for you.
>
> Two things might interest people here, a USB connected pendant and a
> hardware switch debouncer.
>
> The switch debouncer will handle 6 switches, it accepts a raw switch and
> outputs a reliably debounced signal.  It will use an RC lowpass filter and
> a 74HC014 Schmitt trigger. With an LED for each switch.  Yes, you can do
> the debounce in software but this will handle the noise with hardware.  I'm
> still deciding about connectors.  Screw terminals or JST?  Or both.
>
> The pendant is more complex and I'm not sure of the details but here are
> proposed features:
>
>- It will connect with USB.
>- There are three knobs.  All are of the continuous rotation type with
>A/B quadrature output.
>   - The main knob is a CNC "MPG" handwheel with 100 "clicks" per
>   revolution.
>   - The other two are much smaller with about 20 clicks per
>   revolution and also a push-button click operation, like on a car radio.
>   These two knobs replace the more common selector switches.
>   - There is a character-only LCD screen that can display four lines of
>text, 20 characters long
>- There are no labels printed on the front panel.  The current function
>of the two small knobs is displayed on the last line of the LCD
>
> The goal is first off a "clean look" with both low complexity and
> open-ended design.  I think using a character display and rotary controls
> does this.   This pendant could run a 6 axis robot arm or a lathe depending
> on the programming.
>
> *One question:Does a pendant need a "activate" button* on the side such
> that the controls are disabled if you don't hold the button down.  You
> don't want to jog a mill by accident if the wheel is bumped.
>
> I'm making this for myself but I'm designing this as if it were an actual
> product.   So I ask "What would be useful?
>
> I've decided I don't like the idea of a standard red E-Stop button because
> someone might confuse it with the hard-wired kind.  USB can not support
> that.  But I do want a way to quickly stop the machine.  I think pressing
> both small knobs at the same time will stop and re-set everything.  It will
> set the e-stop hal pin and reset the pendant to default.  (Yes e-stop could
> fail if there is a bug in the software)
>
> [image: Simple Pendant v2.jpg]
>
>
>
>
>
>
>
>
> Chris Albertson
> Redondo Beach, California
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Re: [Emc-users] Working on Pendant and debouncer PCBs, comments welcome.

[John Dammeyer]

 
> I've decided I don't like the idea of a standard red E-Stop button because
> someone might confuse it with the hard-wired kind.  USB can not support
> that.  But I do want a way to quickly stop the machine.  I think pressing
> both small knobs at the same time will stop and re-set everything.  It will
> set the e-stop hal pin and reset the pendant to default.  (Yes e-stop could
> fail if there is a bug in the software)
> 
> Chris Albertson
> Redondo Beach, California

For my ELS I have a STOP button.  Press it and it is like a feed hold.  The 
current move completes and then the system stops.  So it doesn't stop in the 
middle of threading but moves the Z until it's finished that pass and then 
stops.  If START is pressed again it then withdraws the tool (X axis) and 
continues back to the begin position.

But if you press and hold the STOP button for a second or so it stops motion 
now.  And if the tool bit is in the middle of threading you will trash the 
thread.  But if it's headed in the wrong direction because you entered a 
Positive END position rather than a negative one from the 0 start position then 
pressing and holding STOP prevents it from going too far in the wrong direction.

One button, one finger, two operations depending on how long it's held.

John Dammeyer



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[Emc-users] Working on Pendant and debouncer PCBs, comments welcome.

[Chris Albertson]

I am going to have JLPCB make some PCBs for me.  They cost only $2 each but
DHL shipping from China is $25 so it makes sense to wait until I have
several projects ready and give then a batch of designs.  They populate the
board now for the price of the components, so it is a great deal.  They do
all the SMT soldering for you.

Two things might interest people here, a USB connected pendant and a
hardware switch debouncer.

The switch debouncer will handle 6 switches, it accepts a raw switch and
outputs a reliably debounced signal.  It will use an RC lowpass filter and
a 74HC014 Schmitt trigger. With an LED for each switch.  Yes, you can do
the debounce in software but this will handle the noise with hardware.  I'm
still deciding about connectors.  Screw terminals or JST?  Or both.

The pendant is more complex and I'm not sure of the details but here are
proposed features:

   - It will connect with USB.
   - There are three knobs.  All are of the continuous rotation type with
   A/B quadrature output.
  - The main knob is a CNC "MPG" handwheel with 100 "clicks" per
  revolution.
  - The other two are much smaller with about 20 clicks per
  revolution and also a push-button click operation, like on a car radio.
  These two knobs replace the more common selector switches.
  - There is a character-only LCD screen that can display four lines of
   text, 20 characters long
   - There are no labels printed on the front panel.  The current function
   of the two small knobs is displayed on the last line of the LCD

The goal is first off a "clean look" with both low complexity and
open-ended design.  I think using a character display and rotary controls
does this.   This pendant could run a 6 axis robot arm or a lathe depending
on the programming.

*One question:Does a pendant need a "activate" button* on the side such
that the controls are disabled if you don't hold the button down.  You
don't want to jog a mill by accident if the wheel is bumped.

I'm making this for myself but I'm designing this as if it were an actual
product.   So I ask "What would be useful?

I've decided I don't like the idea of a standard red E-Stop button because
someone might confuse it with the hard-wired kind.  USB can not support
that.  But I do want a way to quickly stop the machine.  I think pressing
both small knobs at the same time will stop and re-set everything.  It will
set the e-stop hal pin and reset the pendant to default.  (Yes e-stop could
fail if there is a bug in the software)

[image: Simple Pendant v2.jpg]








Chris Albertson
Redondo Beach, California
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Re: [Emc-users] MesaNet cards free to good home

[Jon Elson]

On 06/07/2020 08:10 PM, Scott Harwell via Emc-users wrote:

  How much for the cards? I'm wanting something to play with.



In the subject line :  FREE to good home.

Jon


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Re: [Emc-users] MesaNet cards free to good home

[Scott Harwell via Emc-users]

 How much for the cards? I'm wanting something to play with. 

ThanksScott

On Saturday, June 6, 2020, 8:32:41 PM CDT, Thomas Fritz 
 wrote:  
 
 I'm not much in the CNC game anymore, and I have no plans for another 
build.  I have some Mesa cards that are available to whomever wants them:

Unused: 6i25, 7i76, 7i74, 7i78, 7i77, 7i80db-16

Used: 6i25 and a 7i76 - works, but damaged due to bad jumper settings, 
so daughter card needs external 5V and field IO power




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Re: [Emc-users] Design for the materials and process

[Gene Heskett]

On Sunday 07 June 2020 14:18:07 Chris Albertson wrote:

> I always have to look this stuff up.
> https://www.engineersedge.com/hardware/standard_metric_hex_nuts_13728.
>htm
>
I thought maybe you had that flled away in your wet ram, sorry.

I just read thru the sain smart docs w/o finding anything about the usb 
linkage between cura and the printer.

I have a long usb-2 cable plugged ino a  hub here, and into the otg port 
on th face of the printer, but cura can't update the driver because the 
printer isn't connected. I have one of two cables of about 5 meters 
long, then a C to otg adaptor, but given the lightning history, no clue 
if the cables, either one has survived the last 20 years.
I'll take a keystick to it and see if that's recognized.
Looks like the cable must be fubar, a 16G usb key isn't seen.

Has anyone made the usb interface work so cura's monitor screen works?

Thanks all.

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)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Output amplifier, DIN rail

[andy pugh]

On Sun, 7 Jun 2020 at 23:00, N  wrote:

>
> Output is 24V more or less standard for PLC or similar but the one above
> for connection to Micro Controller.


Maybe
https://www.amazon.co.uk/Zerone-5-220VDC-Industrial-Automation-Process/dp/B0822S5FZJ
And:
https://www.amazon.co.uk/Zerone-Solid-State-Mounting-Screws/dp/B083BXCQFN

(Those SSR DIN clips are pretty good for generic DIN rail use. I have quite
a stock of them now)

-- 
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, 1912

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Re: [Emc-users] Output amplifier, DIN rail

[N]

> On Sun, 7 Jun 2020 at 22:17, N  wrote:
> 
> > > What are you amplifying? Can you use an SSR?
> >
> > 24 volt ouput signals, coil need slightly more than 1A, around 1.3A but
> > driver is not strong enough.
> >
> 
> Something like this maybe?
> https://www.amazon.co.uk/SeeKool-8-Channel-Control-Optocoupler-Raspberry/dp/B07D8RF6MK/
> 
> Though I would use a 7i64.

Output is 24V more or less standard for PLC or similar but the one above for 
connection to Micro Controller. I could simply use a transistor with a resistor 
on the base + a free wheel diode but a module is a better choice.


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Re: [Emc-users] Output amplifier, DIN rail

[andy pugh]

On Sun, 7 Jun 2020 at 22:17, N  wrote:

> > What are you amplifying? Can you use an SSR?
>
> 24 volt ouput signals, coil need slightly more than 1A, around 1.3A but
> driver is not strong enough.
>

Something like this maybe?
https://www.amazon.co.uk/SeeKool-8-Channel-Control-Optocoupler-Raspberry/dp/B07D8RF6MK/

Though I would use a 7i64.

-- 
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, 1912

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Re: [Emc-users] Output amplifier, DIN rail

[N]

> On Sun, 7 Jun 2020 at 21:47, N  wrote:
> 
> > Outputs are a little bit week, need slightly more than one ampere. Chinese
> > have for PLC output amplifier but take weeks to get, anybody now about any
> > sold more locally at resellers like Farnell or similar?
> 
> 
> What are you amplifying? Can you use an SSR?

24 volt ouput signals, coil need slightly more than 1A, around 1.3A but driver 
is not strong enough. Chinese make PLC amplifier module for this purpose, they 
fit on DIN rail, really handy devices but take weeks to get.

https://www.aliexpress.com/item/32801056562.html?spm=2114.search0302.3.90.54db1d60xhGYMS_ab_test=searchweb0_0,searchweb201602_0,searchweb201603_0,ppcSwitch_0_pvid=bc99d82b-1e53-4878-ae9f-f2c3f1d63393_expid=bc99d82b-1e53-4878-ae9f-f2c3f1d63393-13

Sweden


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Re: [Emc-users] Output amplifier, DIN rail

[andy pugh]

On Sun, 7 Jun 2020 at 21:47, N  wrote:

> Outputs are a little bit week, need slightly more than one ampere. Chinese
> have for PLC output amplifier but take weeks to get, anybody now about any
> sold more locally at resellers like Farnell or similar?


What are you amplifying? Can you use an SSR?

(And which country are you in?)

-- 
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, 1912

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Re: [Emc-users] Servo emco compact 5 cnc conversion

[Sam Sokolik]

getting closer..

https://youtu.be/L_iOM6IyYjU

On Mon, Jun 1, 2020 at 6:10 PM Sam Sokolik  wrote:

> Some machining required...
>
>
>
>
> On Sun, May 24, 2020 at 6:00 PM Sam Sokolik  wrote:
>
>> Finally got back to the emco project.  Pittman servos - 10.15 tpi - 2.5
>> belt reduction (stock)  500 line encoders  Input scale of 50800 (inches)
>>
>> I think they are rated at 22w but I cannot find specs for them anymore.
>>
>> https://youtu.be/GrzJKXBsXvM
>>
>> https://youtu.be/HM3UR5sJ5X8
>>
>

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[Emc-users] Output amplifier, DIN rail

[N]

Outputs are a little bit week, need slightly more than one ampere. Chinese have 
for PLC output amplifier but take weeks to get, anybody now about any sold more 
locally at resellers like Farnell or similar?


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Re: [Emc-users] Can't get chuck inside --> now I know

[Ed]

On 6/7/20 10:01 AM, N wrote:

Modig MD6000.




As far as I can tell hydraulic pump used to release tool and pressure release 
valve to lock tool. It is not stated if pressure release valve is hydraulic or 
pneumatic but as hydraulic pump is turned of then retracting I guess pressure 
release valve is used to lock it, will look a hydraulic valve.

Perfect!


Regards Nicklas Karlsson

Almost all machines that have tool changer use air or hydraulic to 
release the tool and springs(usually Belville) to retain the tool. That 
way the machine does not rely on a power source to hold the tool in.



Ed.




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Re: [Emc-users] Pseudo-5-axis

[Stuart Stevenson]

You want to tool length not a z axis offset. If you are using a pivot point
then the only important length is the distance from the tool tip to the
pivot point. A pivot point length plus a tool length should be the distance
from the tool tip to the pivot point.

A G68 could invoke a macro in your kinematics to calculate the xyz points
of the circular interpolation. In the fanuc control you use G17/18/19 to
circular interpolate when using G68. It cuts 3D circles on the imaginary
plane.

On Sun, Jun 7, 2020, 1:04 PM andy pugh  wrote:

> On Sun, 7 Jun 2020 at 18:47, Stuart Stevenson  wrote:
>
> Are the tool lengths you use an actual tool length or a distance from
> > machine zero.
>
>
> Typically they are the height above the table of a tool upside down in the
> presetting fixture on my mill table as measured with my height gauge.
>
> But I could easily change this, maybe making a presetting block for the
> height gauge.
>
> --
> 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, 1912
>
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Re: [Emc-users] Design for the materials and process

[Chris Albertson]

I always have to look this stuff up.
https://www.engineersedge.com/hardware/standard_metric_hex_nuts_13728.htm

The other way to make metal threads is this.  You heat them with solder
iron (hold the tip up vertically and place the brass nut over the tip.)
 then push into a plain hole and the PLA solidifies  Makes a very
professional looking result.
amazon.com/Hilitchi-250-Pcs-Threaded-Embedment-Assortment...


Yes, printing slow makes everything shake less.  I print at 60mm/second and
seem to get better layer to layer adhesion.   But I bet I could do better
only once something works I hate to change.  I printed some braces and
screwed the printer to the bench and that helped the most.

There are dozens of  upgrade parts you can print or make.   (1) look at the
pulleys on your belts.  Most cheap printers use smooth round ones with no
teeth.  These cause vibration on the belt and are best replaced with
real timing belt idler pulleys with ball bearings inside. Make a
filament feed that does not tug on the extruder.  PVC pipe can work for
that.  Th best ones use ball bearings from skateboards, Some brands of
plastic are simply better. Some of tigher tolerances on the diameter (0.003
vs 0.005 mm) so the feed is more consistant.   These are many tiny things
that might add up.




On Sun, Jun 7, 2020 at 7:44 AM Gene Heskett  wrote:

> On Sunday 07 June 2020 01:21:39 Gene Heskett wrote:
>
> I went back to the 12 tooth I'll use for the motor pulley on the BS-1
> clone, and made it with the newer configuration.
>
> Surprise, no junk in the access hole or the nut pocket, but I'd increased
> the nut size to a 5mm nut, which left the outside wall a bit thinner
> than I'd like, so I'll add a couple mm's to the hub diameter.
>
> But before I do that again, perhaps someone could give me better
> measurements for both its width and thickness for a std 5mm nut?
>
> This pulley would be usable, but belt tension is going to be quite high
> as the teeth, at this diameter are rounded enough to allow it to hop.
> Its a good looking render other than that.  Would slowing the movement
> speeds down improve that?  Render time was just a few seconds over an
> hour, which is a huge improvement.
>
> Adhesion problems are gone if the first layer is under .1mm thick.  Thats
> about onion skin if using a paper for gage.
>
> Many thanks for all the help folks.
>
> 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)
> If we desire respect for the law, we must first make the law respectable.
>  - Louis D. Brandeis
> Genes Web page 
>
>
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>


-- 

Chris Albertson
Redondo Beach, California

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Re: [Emc-users] Pseudo-5-axis

[andy pugh]

On Sun, 7 Jun 2020 at 18:47, Stuart Stevenson  wrote:

Are the tool lengths you use an actual tool length or a distance from
> machine zero.


Typically they are the height above the table of a tool upside down in the
presetting fixture on my mill table as measured with my height gauge.

But I could easily change this, maybe making a presetting block for the
height gauge.

-- 
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, 1912

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Re: [Emc-users] Pseudo-5-axis

[Stuart Stevenson]

Embedded answer

On Sun, Jun 7, 2020, 12:32 PM andy pugh  wrote:

> On Sun, 7 Jun 2020 at 17:58, Stuart Stevenson  wrote
>
> >
> > If you are tilting the head of a knee mill (ie BridgePort style) you
> would
> > be rotating the A or B axis.
> >
>
> Yes, I mean B axis. I have been thinking B-axis all along, but for some
> reason typed C.
>
>
> > You would then be able to jog the theoretical A and/or B axes to match
> the
> > head orientation and machine features orthogonal to the tool axis using U
> > and V.
> >
>
> Which would be useful if LinuxCNC could do UV arcs, but I don't think it
> does.
> "The axis of the circle or helix must be parallel to the X, Y, or Z axis of
> the machine coordinate system. The axis (or, equivalently, the plane
> perpendicular to the axis) is selected with G17 (Z-axis, XY-plane),
> G18 (Y-axis,
> XZ-plane), or G19 (X-axis, YZ-plane). Planes 17.1, 18.1, and 19.1 are not
> currently supported. If the arc is circular, it lies in a plane parallel to
> the selected plane."
>
> I believe you would need to use tool lengths and a pivot point to have the
> > display show tool positions relative to other features machined while
> the A
> > and B axes were orthogonal to the XY plane.
> >
>
> I was planning to set up the tool lengths to be relative to the centre of
> rotation of the head.
> But I suspect that to make that work I would have to move all my
> tool-lengths in to the W column, as ordinarily the Z length is simply added
> to the Z axis position with no consideration of kinematics.
>

Are the tool lengths you use an actual tool length or a distance from
machine zero.

>
> --
> 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, 1912
>
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Re: [Emc-users] Pseudo-5-axis

[andy pugh]

On Sun, 7 Jun 2020 at 17:58, Stuart Stevenson  wrote

>
> If you are tilting the head of a knee mill (ie BridgePort style) you would
> be rotating the A or B axis.
>

Yes, I mean B axis. I have been thinking B-axis all along, but for some
reason typed C.


> You would then be able to jog the theoretical A and/or B axes to match the
> head orientation and machine features orthogonal to the tool axis using U
> and V.
>

Which would be useful if LinuxCNC could do UV arcs, but I don't think it
does.
"The axis of the circle or helix must be parallel to the X, Y, or Z axis of
the machine coordinate system. The axis (or, equivalently, the plane
perpendicular to the axis) is selected with G17 (Z-axis, XY-plane),
G18 (Y-axis,
XZ-plane), or G19 (X-axis, YZ-plane). Planes 17.1, 18.1, and 19.1 are not
currently supported. If the arc is circular, it lies in a plane parallel to
the selected plane."

I believe you would need to use tool lengths and a pivot point to have the
> display show tool positions relative to other features machined while the A
> and B axes were orthogonal to the XY plane.
>

I was planning to set up the tool lengths to be relative to the centre of
rotation of the head.
But I suspect that to make that work I would have to move all my
tool-lengths in to the W column, as ordinarily the Z length is simply added
to the Z axis position with no consideration of kinematics.

-- 
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, 1912

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Re: [Emc-users] Pseudo-5-axis

[Stuart Stevenson]

5 axis tool length offsets (Fanuc G43.1 and Haas G143) use the tool length
in the tool table and can be used with the tool axis orthogonal to the XY
plane.

G43 and G43.1 can be used in one program if you set up the parameters to
make sure the offsets are applied in the same direction (ie positive or
negative application direction).




On Sun, Jun 7, 2020 at 11:47 AM andy pugh  wrote:

> On Sun, 7 Jun 2020 at 17:33, John Dammeyer  wrote:
>
> So if I understand what you are saying is that  for example if you pivot
> > the head to the mill to 45 degrees (C axis) under servo control.
>
>
> No, I will loosen the clamps, tilt the head to 45 degrees and then dial in
> the angle so that LinuxCNC knows what I did.
>
>
> > And then move W a distance of 1.414"  at speed S20 then Z and X will each
> > move 1" at S14.412 rate.
> >
>
> Yes.
>
>
> > Are you just planning on writing a parser that looks for C + W + S values
> > and creates X,Z and S values?  One that takes into considering which tool
> > and adds that distance into the W move value?
> >
>
> No, this would be done inside a kinematics module.
> What I am talking about has been done before, see for example maxkins.  (
>
> https://github.com/LinuxCNC/linuxcnc/blob/master/src/emc/kinematics/maxkins.c
> )
> What
> I am really asking is how this works out in practice.
> Maxkins uses a "pivot length" HAL pin rather than the tool length, too. I
> am not sure how the built-in Z offset that tool lengths apply with G43
> would interact with the scheme that I am proposing.
>
> --
> 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, 1912
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/emc-users
>


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Re: [Emc-users] Pseudo-5-axis

[Stuart Stevenson]

Andy,
The C axis label is usually assigned to the rotary axis that rotates
parallel to the Z axis motion of the machine.
If you are tilting the head of a knee mill (ie BridgePort style) you would
be rotating the A or B axis.
You would then be able to jog the theoretical A and/or B axes to match the
head orientation and machine features orthogonal to the tool axis using U
and V.

I believe you would need to use tool lengths and a pivot point to have the
display show tool positions relative to other features machined while the A
and B axes were orthogonal to the XY plane.

A G54 offset may be able to match the display numbers.

On a Fanuc 15mb a G68 command allowed rotating the XY plane to any angle. A
second G68 line would rotate the XY plane to a second angle. The trick is
which to rotate with the first line to end up with the angled plane you
desired. Then XY commands would machine features orthogonal to the
described plane. Drill cycles also worked orthogonal to the described plane.

regards
Stuart


On Sun, Jun 7, 2020 at 11:15 AM andy pugh  wrote:

> My milling machine has a (manual) swivelling head but no quill.
>
> I have long fancied the idea of setting up a pseudo-quill.
>
> My idea is to add C and W axes, where C has to be jogged to suit the actual
> angle head is set to, and then moves in W will be coordinated moves in X
> and Z.
>
> Has anyone used a machine with a B axis and has practical tips about what
> it is like in practice?
>
> I imagine that tool lengths need to be set up to be from the pivot point,
> and that to get the correct behavior the W G-code or jogged value would be
> added to the tool length?
>
> I don't think I am ready to think about the existing A axis in this scheme
> yet.
>
> --
> 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, 1912
>
> ___
> Emc-users mailing list
> Emc-users@lists.sourceforge.net
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>


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Re: [Emc-users] Pseudo-5-axis

[andy pugh]

On Sun, 7 Jun 2020 at 17:33, John Dammeyer  wrote:

So if I understand what you are saying is that  for example if you pivot
> the head to the mill to 45 degrees (C axis) under servo control.


No, I will loosen the clamps, tilt the head to 45 degrees and then dial in
the angle so that LinuxCNC knows what I did.


> And then move W a distance of 1.414"  at speed S20 then Z and X will each
> move 1" at S14.412 rate.
>

Yes.


> Are you just planning on writing a parser that looks for C + W + S values
> and creates X,Z and S values?  One that takes into considering which tool
> and adds that distance into the W move value?
>

No, this would be done inside a kinematics module.
What I am talking about has been done before, see for example maxkins.  (
https://github.com/LinuxCNC/linuxcnc/blob/master/src/emc/kinematics/maxkins.c)
What
I am really asking is how this works out in practice.
Maxkins uses a "pivot length" HAL pin rather than the tool length, too. I
am not sure how the built-in Z offset that tool lengths apply with G43
would interact with the scheme that I am proposing.

-- 
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, 1912

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[Emc-users] Pseudo-5-axis

[andy pugh]

My milling machine has a (manual) swivelling head but no quill.

I have long fancied the idea of setting up a pseudo-quill.

My idea is to add C and W axes, where C has to be jogged to suit the actual
angle head is set to, and then moves in W will be coordinated moves in X
and Z.

Has anyone used a machine with a B axis and has practical tips about what
it is like in practice?

I imagine that tool lengths need to be set up to be from the pivot point,
and that to get the correct behavior the W G-code or jogged value would be
added to the tool length?

I don't think I am ready to think about the existing A axis in this scheme
yet.

-- 
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, 1912

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Re: [Emc-users] Design for the materials and process

[Brent Loschen]

On 6/7/2020 8:41 AM, Gene Heskett wrote:

On Sunday 07 June 2020 01:21:39 Gene Heskett wrote:

I went back to the 12 tooth I'll use for the motor pulley on the BS-1
clone, and made it with the newer configuration.

Surprise, no junk in the access hole or the nut pocket, but I'd increased
the nut size to a 5mm nut, which left the outside wall a bit thinner
than I'd like, so I'll add a couple mm's to the hub diameter.

But before I do that again, perhaps someone could give me better
measurements for both its width and thickness for a std 5mm nut?

8 x 4 check out: https://www.mcmaster.com/90592A095


This pulley would be usable, but belt tension is going to be quite high
as the teeth, at this diameter are rounded enough to allow it to hop.
Its a good looking render other than that.  Would slowing the movement
speeds down improve that?  Render time was just a few seconds over an
hour, which is a huge improvement.

Adhesion problems are gone if the first layer is under .1mm thick.  Thats
about onion skin if using a paper for gage.

Many thanks for all the help folks.

Cheers, Gene Heskett




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Re: [Emc-users] Can't get chuck inside --> now I know

[N]

> > Modig MD6000.
> >
> 
> There is one here doing tool-changes with LinuxCNC.
> https://www.youtube.com/watch?v=SkAjD2iKizU
> It isn't clear from the noises if it is a hydraulic or pneumatic clamp...
> 
> But, this message on the forum from the same chap says that the clamp is
> hydraulic:
> https://forum.linuxcnc.org/24-hal-components/29153-vmc-related-hal-questions?start=110#67391

As far as I can tell hydraulic pump used to release tool and pressure release 
valve to lock tool. It is not stated if pressure release valve is hydraulic or 
pneumatic but as hydraulic pump is turned of then retracting I guess pressure 
release valve is used to lock it, will look a hydraulic valve.

Perfect!


Regards Nicklas Karlsson


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Re: [Emc-users] Design for the materials and process

[Gene Heskett]

On Sunday 07 June 2020 01:21:39 Gene Heskett wrote:

I went back to the 12 tooth I'll use for the motor pulley on the BS-1 
clone, and made it with the newer configuration.

Surprise, no junk in the access hole or the nut pocket, but I'd increased 
the nut size to a 5mm nut, which left the outside wall a bit thinner 
than I'd like, so I'll add a couple mm's to the hub diameter.

But before I do that again, perhaps someone could give me better 
measurements for both its width and thickness for a std 5mm nut?

This pulley would be usable, but belt tension is going to be quite high 
as the teeth, at this diameter are rounded enough to allow it to hop. 
Its a good looking render other than that.  Would slowing the movement 
speeds down improve that?  Render time was just a few seconds over an 
hour, which is a huge improvement.

Adhesion problems are gone if the first layer is under .1mm thick.  Thats 
about onion skin if using a paper for gage.

Many thanks for all the help folks.

Cheers, Gene Heskett
-- 
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 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
If we desire respect for the law, we must first make the law respectable.
 - Louis D. Brandeis
Genes Web page 


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Re: [Emc-users] Can't get chuck inside

[andy pugh]

On Sun, 7 Jun 2020 at 14:47, N  wrote:

> Modig MD6000.
>

There is one here doing tool-changes with LinuxCNC.
https://www.youtube.com/watch?v=SkAjD2iKizU
It isn't clear from the noises if it is a hydraulic or pneumatic clamp...

But, this message on the forum from the same chap says that the clamp is
hydraulic:
https://forum.linuxcnc.org/24-hal-components/29153-vmc-related-hal-questions?start=110#67391

-- 
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, 1912

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Re: [Emc-users] Can't get chuck inside

[N]

Modig MD6000. I removed a plate on front side then I changed encoder which did 
not seem to have any other purpose than visual so it might be rebranded from 
some other machine but have no idea. Manufactured around 1985-1989 but do not 
remember exactly.

> What kind of machine are you taking about?
> Peter
> 
> Am 07.06.2020 um 14:24 schrieb N:
> > I can't get the chuck inside.
> >
> > Think I got the right chuck ISO40 but are not totally sure, then I try to 
> > insert it I hit something at the bottom. There is a pneumatic pipe and 
> > tried this one and also a hydraulic hose connected to a high pressure pump 
> > but have no idea what happen on inside. Do anybody else have? Then 
> > pneumatic pressure should be applied and then hydraulic pump should be 
> > started?
> >
> > Regards Nicklas Karlsson
> >
> >
> > ___
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> 
> 
> 
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Re: [Emc-users] Can't get chuck inside

[Peter Blodow]

What kind of machine are you taking about?
Peter

Am 07.06.2020 um 14:24 schrieb N:

I can't get the chuck inside.

Think I got the right chuck ISO40 but are not totally sure, then I try to 
insert it I hit something at the bottom. There is a pneumatic pipe and tried 
this one and also a hydraulic hose connected to a high pressure pump but have 
no idea what happen on inside. Do anybody else have? Then pneumatic pressure 
should be applied and then hydraulic pump should be started?

Regards Nicklas Karlsson


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Re: [Emc-users] Can't get chuck inside

[N]

> > I can't get the chuck inside.
> >
> > Think I got the right chuck ISO40 but are not totally sure, then I try to
> > insert it I hit something at the bottom. There is a pneumatic pipe and
> > tried this one and also a hydraulic hose connected to a high pressure pump
> > but have no idea what happen on inside. Do anybody else have? Then
> > pneumatic pressure should be applied and then hydraulic pump should be
> > started?
> 
> 
> Can you give some context?
> 
> Is this a new machine, an old machine, an old machine with a new spindle?

It is an old machine, old spindle and new chuck. Never got machine to run with 
old control system, throw out all old electronics except screw plints, relays 
and similar. Have replaced some or most of it with it with new parts. Joints 
running now and could run spindle manually so it is time to insert a chuck to 
get some real done.

> It is possible that the pneumatic line is an air blast and the  hydraulic
> is the tool release, but equally possible that the pneumatic is tool
> release and the hydraulic is lubrication.

Both pneumatic and hydraulic pipes disappear inside spinde assembly. Aside from 
hydraulic pump there are two pneuamatically actuated "cans" I guess are for 
lubrication. There is a crane posibble to open on high pressure pump, thin oil 
came out so I guess it is not for lubrication.


Regards Nicklas Karlsson


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Re: [Emc-users] Can't get chuck inside

[andy pugh]

On Sun, 7 Jun 2020 at 13:27, N  wrote:

> I can't get the chuck inside.
>
> Think I got the right chuck ISO40 but are not totally sure, then I try to
> insert it I hit something at the bottom. There is a pneumatic pipe and
> tried this one and also a hydraulic hose connected to a high pressure pump
> but have no idea what happen on inside. Do anybody else have? Then
> pneumatic pressure should be applied and then hydraulic pump should be
> started?


Can you give some context?

Is this a new machine, an old machine, an old machine with a new spindle?

It is possible that the pneumatic line is an air blast and the  hydraulic
is the tool release, but equally possible that the pneumatic is tool
release and the hydraulic is lubrication.

-- 
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, 1912

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Re: [Emc-users] Design for the materials and process

[andy pugh]

On Sun, 7 Jun 2020 at 05:33, Thomas J Powderly  wrote:

>
> There is no chart, but there are a few different colors:
> - Green = outer wall lines
> - Red = inner wall lines
> - Cyan = support/skirt
> - Dark blue = moves (thin lines)
> - 3 other colors = infill (cycles between the 3 colors)


Curious, the only colours I see are due to the different filaments I have
loaded in the two extruders.
(v4.2.1 Mac)

-- 
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, 1912

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Re: [Emc-users] MesaNet cards free to good home

[Andrew]

Hi Thomas,

Thanks for your generous offer!
I work at the university so I think they could be very useful for our
projects.
I live in Ukraine.

Thanks, Andrew

нд, 7 черв. 2020 о 04:32 Thomas Fritz  пише:

> I'm not much in the CNC game anymore, and I have no plans for another
> build.  I have some Mesa cards that are available to whomever wants them:
>
> Unused: 6i25, 7i76, 7i74, 7i78, 7i77, 7i80db-16
>
> Used: 6i25 and a 7i76 - works, but damaged due to bad jumper settings,
> so daughter card needs external 5V and field IO power
>
>
>
>
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