Re: [Emc-users] ACCEPTED SECONDED NOMINATION: Alex Joni

[Alex Joni]

Thanks for the kind words.
I accept the nomination, but it's far more important to me to be part of the 
team than to actually be reelected again.

Alex

PS: I promise to try to come to the next fest, even if not elected


- Original Message - 
From: "Jeff Epler" <[EMAIL PROTECTED]>


> In addition to the things Sam mentioned, Alex brings an international
> flavor to emc development.  He also really understands teamwork.  While
> most of the developers simply try to make sure they're not stepping on
> anybody's toes, Alex will pop up and offer to do the tedious part of a
> project (be it a new feature or a bugfix), collaborating smoothly with
> everyone else no matter the timezone.
>
> Jeff
> PS Alex, you have to promise that if you're reelected you will also come
> to CNC Workshop 2008


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Re: [Emc-users] CNC4PC C10 Breakout Board

[John Thornton]

On 24 Jul 2007 at 12:46, [EMAIL PROTECTED] wrote:

> 
> Based on the description of the board, I see no reason why it would
> not work with emc's hal_parport in "I" or "O" mode.
> 
> It would not work with boards like the Universal Stepper Controller or
> Pluto Servo Controller which use the parallel port in EPP mode.  It
> also would not work with hal_parport in "X" mode.
> 
> However, I also haven't tested this board with emc.
> 
> If you do decide to try this board, please let us know your
> experiences either here on the users list or on
> http://wiki.linuxcnc.org/ on the page "EMC2 Supported Hardware".
> 
> Jeff
> 

Thanks for the reply Jeff,

Would I be better off at this stage to get something like the Mesa M5i20 card 
and 
learn to use that? It seems like it has a lot more capibility... My first 
attempt most 
likely will be with a couple of steppers or some used servos. BTW, I'm building 
a 
portable plasma table.  I'm not too concerened with proper speeds yet just 
figuring 
out the parts of the puzzle so to speak. 

Thanks
John

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[Emc-users] SECONDED: Dan Falck

[Ray Henry]

On Tue, 2007-07-24 at 22:29 -0400, Steve Stallings wrote:

Dan will certainly bring to the board a lot of part production, shop
floor, part programming, and retrofitting experience. 



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Re: [Emc-users] CNC4PC C10 Breakout Board

[Ray Henry]

Hi John

A board like you are looking at will certainly get you started with step
and direction.  It can also allow you to test HAL things by connecting
switches to pins and see them work.  Back in the old days we used to cut
apart parport cables and wire these in but you can't do that today with
Gecko drives and 3 volt mobos.  There are many stepper driven minimills
out there running with these kinds of interface cards.  The down side is
that you are pretty much limited to steppers and a few IO.  You're also
limited to 3-5 volt -- a pretty big limit for an old guy like me.

The alternative you mention, a card like the M5i20 does offer many more
pins and a wider variety of function.  Using one of these requires a bit
bigger step up to understand all the extra stuff you'll see in the HAL.
If you plan to experiment with servo systems, any thing beyond the open
loop, step-and-direction signalled sort like Rutex or Gecko, you'll need
the ability to read in encoder signals at fairly high speed.  In
addition, the IO breakouts for this card or similar permit the use of
higher DC voltages.  This is a plus if you use prox switches and
industrial grade relays. 

m2cw

Rayh 


On Wed, 2007-07-25 at 06:49 -0500, John Thornton wrote:
> On 24 Jul 2007 at 12:46, [EMAIL PROTECTED] wrote:
> 
> > 
> > Based on the description of the board, I see no reason why it would
> > not work with emc's hal_parport in "I" or "O" mode.
> > 
> > It would not work with boards like the Universal Stepper Controller or
> > Pluto Servo Controller which use the parallel port in EPP mode.  It
> > also would not work with hal_parport in "X" mode.
> > 
> > However, I also haven't tested this board with emc.
> > 
> > If you do decide to try this board, please let us know your
> > experiences either here on the users list or on
> > http://wiki.linuxcnc.org/ on the page "EMC2 Supported Hardware".
> > 
> > Jeff
> > 
> 
> Thanks for the reply Jeff,
> 
> Would I be better off at this stage to get something like the Mesa M5i20 card 
> and 
> learn to use that? It seems like it has a lot more capibility... My first 
> attempt most 
> likely will be with a couple of steppers or some used servos. BTW, I'm 
> building a 
> portable plasma table.  I'm not too concerened with proper speeds yet just 
> figuring 
> out the parts of the puzzle so to speak. 
> 
> Thanks
> John
> 
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> 


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Re: [Emc-users] ACCEPTED SECOND: Sam Sokolik

[Sam Sokolik]

Thanks for your kind words.  If elected it will be my first step in taking 
over the world bah ha ha ha..  sorry.

Seriously - I will do my best to bring my perspective to emc.   I love 
showing people what emc can do.  Its open sourceness is what brought me to 
it (think free ;) )  and the more I use it - the more I see what it can do. 
I think half of the people I show emc to don't believe it can do what it 
does.

All the developers are doing such /great work improving emc - I am glad to 
be a little part of it.

thank you
sam


- Original Message - 
From: "Kenneth Lerman" <[EMAIL PROTECTED]>
To: "Enhanced Machine Controller (EMC)" 
Sent: Tuesday, July 24, 2007 12:13 PM
Subject: Re: [Emc-users] SECOND: Sam Sokolik


>I agree with Chris.
>
> [EMAIL PROTECTED]
> Mark Kenny Products Company, LLC
> 55 Main Street   Voice: (888)ISO-SEVO (888)476-7386
> Newtown, CT 06470Fax: (203)426-9138
> http://www.MarkKenny.com
>
>
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Behalf Of Chris Radek
> Sent: Tuesday, July 24, 2007 11:02 AM
> To: emc-users@lists.sourceforge.net
> Subject: [Emc-users] NOMINATION: Sam Sokolik
>
>
> I nominate Sam, who we all know as skunkworks on irc, for a Board
> position.  He is a tireless advocate for EMC and generously helps
> and teaches many people.
>
> Sam is not an EMC programmer and previously the Board tended to be
> made up of only programmers.  I think having a user and advocate on
> the Board would be a nice balance and might bring new ideas and
> direction to the project.
>
> Chris
>
>
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[Emc-users] Board Seats

[Gene Heskett]

Greetings;

I've no idea if my input as a hobbyist user is wanted, but from the list of 
nominees so far, I've been very impressed with their patience with this old 
fart, and their knowledge, both on the list and on IRC.

So the questions I have are, how many 'chairs' are there around this table?

And how many of them are now filled with highly qualified nominees?

In other words I assume someone is keeping a list all on one page...

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Stenderup's Law:
The sooner you fall behind, the more time you will have to catch up.

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Re: [Emc-users] Board Seats

[Stephen Wille Padnos]

Hi Gene

At the moment, there are 5 board members:
Jon Elson
Ray Henry
Alex Joni
John Kasunich
Chris Radek (Chairperson)

I suspect there will be 5 after the election as well :)

- Steve

Gene Heskett wrote:

>Greetings;
>
>I've no idea if my input as a hobbyist user is wanted, but from the list of 
>nominees so far, I've been very impressed with their patience with this old 
>fart, and their knowledge, both on the list and on IRC.
>
>So the questions I have are, how many 'chairs' are there around this table?
>
>And how many of them are now filled with highly qualified nominees?
>
>In other words I assume someone is keeping a list all on one page...
>
>  
>

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Re: [Emc-users] Board Seats

[Chris Radek]

On Wed, Jul 25, 2007 at 11:07:08AM -0400, Gene Heskett wrote:
> Greetings;
> 
> I've no idea if my input as a hobbyist user is wanted, but from the list of 
> nominees so far, I've been very impressed with their patience with this old 
> fart, and their knowledge, both on the list and on IRC.

Everyone receiving either of these two mailing lists is eligible to
nominate and vote on board members.  I saved off a list of email
addresses when I made the announcement and that will be the list of
people who get ballots.

You bet your input is wanted.

Chris

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Re: [Emc-users] Lathe Spindle Speed Control?

[Sam Sokolik]

If it where me...  I would put those limits into the vfd (spindle 
accel/decel)  unless your going to try to close the spindle speed loop 
within emc.

sam
- Original Message - 
From: "RogerN" <[EMAIL PROTECTED]>
To: 
Sent: Wednesday, July 25, 2007 1:09 PM
Subject: [Emc-users] Lathe Spindle Speed Control?


>I have my VFD forward and reverse connected to the M5i20 through the
> 7i37 board, M3 & M4 works as they should.
>
> Now I need to connect the spindle speed control.  The basic idea is to
> get the spindle speed command to the M5i20 dac 3.  Since I have
> different gears, I would like to use my spindle encoder feedback and
> either increase or decrease the command to get the programmed speed.
>
> Also, my drive will handle about 300-400 rpm per second deceleration
> without dynamic braking.  Are there trajectory settings for spindle
> speed?
>
> Roger Neal
>
>
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Re: [Emc-users] Lathe Spindle Speed Control?

[Stephen Wille Padnos]

RogerN wrote:

>I have my VFD forward and reverse connected to the M5i20 through the 
>7i37 board, M3 & M4 works as they should.
>
>Now I need to connect the spindle speed control.  The basic idea is to 
>get the spindle speed command to the M5i20 dac 3.  Since I have 
>different gears, I would like to use my spindle encoder feedback and 
>either increase or decrease the command to get the programmed speed.
>  
>
You can use a PID on the spindle speed.  Connect the PID command input 
to motion.spindle-speed-out, tune PID.  The only trouble will be if you 
need a speed that can't be reached in the present gear.  Ideally, you'd 
have an input or two that tell EMC what gear it's in, and you can use a 
comparator block to check whether the requested speed can be reached in 
the current gear (and pop up a dialog telling the user to change gears 
if not).  That's not a trivial setup though.

>Also, my drive will handle about 300-400 rpm per second deceleration 
>without dynamic braking.  Are there trajectory settings for spindle 
>speed?
>  
>
You can use a limit block for this, if tuning the PID doesn't do it for you.

- Steve

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Re: [Emc-users] Lathe Spindle Speed Control?

[Kirk Wallace]

On Wed, 2007-07-25 at 14:38 -0400, John Kasunich wrote:
> RogerN wrote:
> > For the 850 RPM gear range, I need 2-3 second decel, for the 2800 RPM, I 
> > need around 8 second decel.  I could use a drive input to select between 
> > motor 1 and motor 2 and have different decel times for the motors.
> > 
> > Thanks
> > Roger Neal
> 
> Are you sure you really need to close the speed loop?  Or would it be 
> sufficient to simply send the appropriate command to the VFD?
> "Appropriate" means that it has been corrected for the gear ratio for
> whatever gear you are in at the moment.

When I first read this, I thought you would need feedback to do CSS
(Constant Surface Speed), but I guess that is not true. You would only
need feedback in situations where the commanded speed and the actual
speed could be far enough apart to be considered out of tolerance, or if
you needed to position the spindle for milling operations. I wonder if a
VFD could be used for positioning? I am guessing that if the spindle
speed varies more than a handful of percent from the commanded speed,
the motor will stall. I would be interested in hearing anyone's
experience with this.

> If you can mount a switch to your machine that is actuated in one gear
> (ideal), or if you are willing to click a GUI button to tell the system
> what gear you are in, its not that difficult in HAL to generate two
> speed commands, one for each gear, and route the appropriate one to the
> DAC and then to the VFD.

I am planning on using the Hardinge HNC codes M03 - Low Clutch and Motor
Forward, M04 - Low Clutch and Motor Reverse and M43 - Low Clutch and
Motor Forward, M44 - Low Clutch and Motor Reverse. Although, for the
short term (probably forever) I will use one of the M62-5 or M100-199
codes. I am happier keeping it simple and commanding the (motor) speed
and gear, and then, taking the active gear ratio into consideration in
the programming.

> That's what we do for the Mazak at the CNC workshop, but we went one
> step farther there - we have classicladder logic that actually does the
> gear change sequence.  The Mazak has hydraulics to shift the gears, and
> prox switches to tell what position the shifter is in.  The HAL/Ladder
> config we have automatically slows the motor to 15 RPM, then shifts to
> neutral, shifts into the new gear, and accels to the final speed.
> 
> Regards,
> 
> John Kasunich



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[Emc-users] Jog Wheel Information

[Kirk Wallace]

A while back, there was allot of good information floating around
concerning jog wheels. Now that I _actually_ want to install one, the
information doesn't seem to be handy. I wonder if it would be
appropriate to have a short information, vendor and resource list on the
Links, Hardware page, or Documentation, Technical Articles, or on the
wiki? I could try to put together any information that comes my way. (A
resource for encoders would be good too.)

Kirk Wallace


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Re: [Emc-users] Board Seats

[Gene Heskett]

On Wednesday 25 July 2007, Stephen Wille Padnos wrote:
>Gene Heskett wrote:
>>On Wednesday 25 July 2007, Stephen Wille Padnos wrote:
>>>Hi Gene
>>>
>>>At the moment, there are 5 board members:
>>>Jon Elson
>>>Ray Henry
>>>Alex Joni
>>>John Kasunich
>>>Chris Radek (Chairperson)
>>>
>>>I suspect there will be 5 after the election as well :)
>>>
>>>- Steve
>>
>>No doubt.  But that does seem to be a pretty small table considering the
>>number of very talented folks available.  It would seem to be a shame to
>> bump someone to make room for other, also highly qualified folks.
>>
>>Since emc's popularity seems to be growing all the time, being able to
>> include other talented people on the board would seem to be a worthwhile
>> way of saying thanks to all of them.
>>
>>Of course theres always that old saw about the error while compiling
>>committee.c, too many arguments to function. :)
>
>Heh.  I like that one :)
>
>The board is distinct from the developers.  The board is there to make
>decisions that affect the direction of development (do we deviate from
>the RS274NGC spec, do we add features for 23-axis machines ...),
>decisions about things like distribution and websites, that sort of
>thing.  Also, when situations arise that concern things like potential
>GPL violations or other licensing issues, the board is there as an
>authoritative body to communicate with outside parties.
>
>In essence, the board is mostly uninvolved with day-to-day development,
>as I see it.
>
>- Steve
>
I see, thanks.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
rain falls where clouds come
sun shines where clouds go
clouds just come and go
-- Florian Gutzwiller

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Re: [Emc-users] Board Seats

[Stephen Wille Padnos]

Gene Heskett wrote:

>On Wednesday 25 July 2007, Stephen Wille Padnos wrote:
>  
>
>>Hi Gene
>>
>>At the moment, there are 5 board members:
>>Jon Elson
>>Ray Henry
>>Alex Joni
>>John Kasunich
>>Chris Radek (Chairperson)
>>
>>I suspect there will be 5 after the election as well :)
>>
>>- Steve
>>
>>
>
>No doubt.  But that does seem to be a pretty small table considering the 
>number of very talented folks available.  It would seem to be a shame to bump 
>someone to make room for other, also highly qualified folks.
>
>Since emc's popularity seems to be growing all the time, being able to include 
>other talented people on the board would seem to be a worthwhile way of 
>saying thanks to all of them.
>
>Of course theres always that old saw about the error while compiling 
>committee.c, too many arguments to function. :)
>  
>
Heh.  I like that one :)

The board is distinct from the developers.  The board is there to make 
decisions that affect the direction of development (do we deviate from 
the RS274NGC spec, do we add features for 23-axis machines ...), 
decisions about things like distribution and websites, that sort of 
thing.  Also, when situations arise that concern things like potential 
GPL violations or other licensing issues, the board is there as an 
authoritative body to communicate with outside parties.

In essence, the board is mostly uninvolved with day-to-day development, 
as I see it.

- Steve


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Re: [Emc-users] error in lauching halmeter and halscope ( RTAPI error)

[Chris Radek]

On Thu, Jul 26, 2007 at 11:30:41AM +0800, Xuecheng Xi wrote:
> Dear Alex:
> 
> I have tried your suggestion. But  after compiling
> (--enable-run-in-place) emc2.1.6, in the directory
> "emc2/bin/"
> there is no executable file "halscope" or "halmeter"
> 
> after I copied the old version "halscope" and "halmeter" into the
> directory "emc2/bin"
> I can launch them. I don't know where is the new halscope and halmeter
> which are from emc2.1.6?
> 
> thanks
> Xuecheng

You must be missing some build dependencies.  apt-get build-dep emc2
will help you if you're running ubuntu, otherwise carefully check
the output of configure and install packages accordingly.

Chris


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Re: [Emc-users] error in lauching halmeter and halscope ( RTAPI error)

[John Kasunich]

Xuecheng Xi wrote:
> Dear Alex:
> 
> I have tried your suggestion. But  after compiling
> (--enable-run-in-place) emc2.1.6, in the directory
> "emc2/bin/"
> there is no executable file "halscope" or "halmeter"
> 
> after I copied the old version "halscope" and "halmeter" into the
> directory "emc2/bin"
> I can launch them. I don't know where is the new halscope and halmeter
> which are from emc2.1.6?

I bet they aren't being compiled.  Halscope and Halmeter need GTK
version 2.4.0 or later.  If the appropriate GTK development packages
aren't installed, any programs that use GTK won't be built.

Re-run configure, and examine the output closely... on my system there
is a line like this:

"checking for GTK 2.4.0 or above... yes - 2.8.20"

I bet you have a message that says

"checking for GTK 2.4.0 or above... no - some programs will not be built"

or something like that.

To fix that, install the GTK 2.4 or later development packages on your 
system and re-run configure.  For a Dapper system that probably means

"apt-get install  libgtk2.0-dev"

The reason we don't simply have configure stop and report an error is
that halmeter and halscope are considered "optional" programs - they are
tools that you use to tweak EMC, not critical parts of EMC itself.

Regards,

John Kasunich



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Re: [Emc-users] Lathe Spindle Speed Control?

[RogerN]

- Original Message - 
From: "John Kasunich" <[EMAIL PROTECTED]>

>
> You don't want in integrator.  It won't stop when it reached the 
> desired
> speed, it just keeps going.

I was thinking of having the input to the integrator being based on the 
error between the command rpm and the feedback rpm.
Example
M3 S800
given an aceleration rate of 500 rpm per second
Time zero, Input to integrator equals 800rpm(command) - 0rpm(feedback) = 
800, limited to 500rpm/sec.
Time 1 second, Input to integrator equals 800rpm - 500rpm(spindle speed 
after 1 second) = 300rpm/sec into integrator.
Time 2 seconds, Input to integrator equals 800rpm - 800rpm(spindle 
speed) = 0 input into integrator.
S400
Deceletation limited to 300rpm/sec.
Time 3 seconds, Input to integrator = 400rpm - 800rpm = -400rpm limited 
to -300rpm
Time 4 seconds, Input to integrator = 400rpm - 500rpm = -100rpm...
Time 5 seconds, Input to Integrator = 400rpm -400rpm = 0 output to 
integrator.
This way the input to the integrator is limited to keep its command from 
acelerating or decelerationg.

Perhaps limit2 could do this better?

Thanks again!
Roger Neal


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Re: [Emc-users] Lathe Spindle Speed Control?

[John Kasunich]

RogerN wrote:

> I probably don't need closed loop spindle speed control, I just thought 
> since I have the encoder, and two unused axis available, why not!  After 
> spending some time reading the hal documentation tonight I got an idea 
> that might work.  What if I used HAL's integrator with commanded_speed - 
> feedback_speed_IN with limits of something like 500rpm/sec acel and 
> 300rpm/sec decel.  I think that would command my spindle drive to 
> accelerate at 500rpm per second until it reached the commanded rpm and 
> decelerate at 300rpm/sec until it reached the lowered commanded rpm. 
> Any thoughts?  Would this work?

You don't want in integrator.  It won't stop when it reached the desired 
speed, it just keeps going.

However, we do have a block that does exactly what you need: limit2
The output of a limit2 block tracks its input, while obeying minimum
and maximum value limits and a rate-of-change limit.

> Other thought is to use the multiplexer and select a gear ratio that 
> would best fit the desired SFM.

I'd probably use a pair of scale blocks to convert the commanded spindle
speed into motor speeds for each gear, followed by a pair of limit2 
blocks to enforce ramp rates (can be different for each gear), and then
going into a mux that selects one or the other depending on the gear you 
are in.

Regards,

John Kasunich

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Re: [Emc-users] Lathe Spindle Speed Control?

[RogerN]

- Original Message - 
From: "John Kasunich" <[EMAIL PROTECTED]>

> Are you sure you really need to close the speed loop?  Or would it be
> sufficient to simply send the appropriate command to the VFD?
> "Appropriate" means that it has been corrected for the gear ratio for
> whatever gear you are in at the moment.

I probably don't need closed loop spindle speed control, I just thought 
since I have the encoder, and two unused axis available, why not!  After 
spending some time reading the hal documentation tonight I got an idea 
that might work.  What if I used HAL's integrator with commanded_speed - 
feedback_speed_IN with limits of something like 500rpm/sec acel and 
300rpm/sec decel.  I think that would command my spindle drive to 
accelerate at 500rpm per second until it reached the commanded rpm and 
decelerate at 300rpm/sec until it reached the lowered commanded rpm. 
Any thoughts?  Would this work?

Other thought is to use the multiplexer and select a gear ratio that 
would best fit the desired SFM.

Thanks!

Roger Neal


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[Emc-users] Fine tuning

[Jason Cox]

Hi all,
I have rebuilt my DIY 2.5D Mill on Ubuntu 6.06 EMC and have a few
questions based upon the latest apt-get package,

1. Is the backlash feed rate set to the same acceleration curves as
normal moves, or do I need to upgrade to the latest CVS ?

2. How do I setup the max velocity on a per axis basis ( my Z move can
only handle 100mm / min others aprox 200mm /min) ?

Thanks
Jason Cox


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Re: [Emc-users] Screen Saver

[John Kasunich]

Jerry Jankura wrote:
> Hi, Folks:
> 
> How do you turn the screen saver "off" when running EMC?
> 
> -- 
> -- Jerry Jankura
>So many toys So little time

If you are running Ubuntu, click on System->Preferences->Screensaver
That should let you select any screensaver, including none.  If you
aren't using Ubuntu, I don't know, but its probably not to dramatically
different from that.

Regards,

John Kasunich


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[Emc-users] Screen Saver

[Jerry Jankura]

Hi, Folks:

How do you turn the screen saver "off" when running EMC?

--
-- Jerry Jankura
  So many toys So little time

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Re: [Emc-users] Board Seats

[Gene Heskett]

On Wednesday 25 July 2007, Chris Radek wrote:
>On Wed, Jul 25, 2007 at 11:07:08AM -0400, Gene Heskett wrote:
>> Greetings;
>>
>> I've no idea if my input as a hobbyist user is wanted, but from the list
>> of nominees so far, I've been very impressed with their patience with this
>> old fart, and their knowledge, both on the list and on IRC.
>
>Everyone receiving either of these two mailing lists is eligible to
>nominate and vote on board members.  I saved off a list of email
>addresses when I made the announcement and that will be the list of
>people who get ballots.
>
>You bet your input is wanted.
>
>Chris
>
Thanks Chris.  See my reply to Steven re the size of the table & number of 
chairs.

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Oh no, not again.
-- Manoj Srivastava

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Re: [Emc-users] Board Seats

[Gene Heskett]

On Wednesday 25 July 2007, Stephen Wille Padnos wrote:
>Hi Gene
>
>At the moment, there are 5 board members:
>Jon Elson
>Ray Henry
>Alex Joni
>John Kasunich
>Chris Radek (Chairperson)
>
>I suspect there will be 5 after the election as well :)
>
>- Steve

No doubt.  But that does seem to be a pretty small table considering the 
number of very talented folks available.  It would seem to be a shame to bump 
someone to make room for other, also highly qualified folks.

Since emc's popularity seems to be growing all the time, being able to include 
other talented people on the board would seem to be a worthwhile way of 
saying thanks to all of them.

Of course theres always that old saw about the error while compiling 
committee.c, too many arguments to function. :)

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
This is the tomorrow you worried about yesterday.  And now you know why.

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Re: [Emc-users] Lathe Spindle Speed Control?

[John Kasunich]

RogerN wrote:
> For the 850 RPM gear range, I need 2-3 second decel, for the 2800 RPM, I 
> need around 8 second decel.  I could use a drive input to select between 
> motor 1 and motor 2 and have different decel times for the motors.
> 
> Thanks
> Roger Neal

Are you sure you really need to close the speed loop?  Or would it be 
sufficient to simply send the appropriate command to the VFD?
"Appropriate" means that it has been corrected for the gear ratio for
whatever gear you are in at the moment.

If you can mount a switch to your machine that is actuated in one gear
(ideal), or if you are willing to click a GUI button to tell the system
what gear you are in, its not that difficult in HAL to generate two
speed commands, one for each gear, and route the appropriate one to the
DAC and then to the VFD.

That's what we do for the Mazak at the CNC workshop, but we went one
step farther there - we have classicladder logic that actually does the
gear change sequence.  The Mazak has hydraulics to shift the gears, and
prox switches to tell what position the shifter is in.  The HAL/Ladder
config we have automatically slows the motor to 15 RPM, then shifts to
neutral, shifts into the new gear, and accels to the final speed.

Regards,

John Kasunich


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Re: [Emc-users] emc2 v2.1 users handbook

[Dennis Coleman]

Thanks

 

Dennis

 

  _  

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Sam Sokolik
Sent: Wednesday, July 25, 2007 1:03 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] emc2 v2.1 users handbook

 

what you are downloading is the emc2 live cd image.  You would use your cd
burning software to create a bootable live cd that can be used to evaluate
or install emc.  (you can access the docs also.  

 

Otherwide the docs are always here

http://www.linuxcnc.org/docs/

 

sam

 

- Original Message - 

From: Dennis   Coleman 

To: emc-users@lists.sourceforge.net 

Sent: Wednesday, July 25, 2007 1:01 PM

Subject: [Emc-users] emc2 v2.1 users handbook

 

I think I need to begin in the beginning.  I have downloaded the
user's handbook twice.  When I try to open the download from my desktop I
get this message.  "Adobe reader could not open
'emc2-unbutu6.06-desktop-i386.iso' because it is either not a supported file
type or because the file has been damaged [for example, it was sent as an
email attachment and wasn't correctly decoded]."  

Can some suggest a course of action?

 

Dennis 

 

Motion Products, Inc.


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Re: [Emc-users] M1xx code and PLC

[Manfredi Leto]

Hi,

In EMC2 M1XX codes are simply "programs". Executable programs. So, they 
could be bash scripts,  compiled C programs, a Python scripts...whatever can 
be executed.


When the interpreter finds a M1XX in the part-program, it simply executes 
the program/script with that name, after that, it continues to read and 
execute the g-code commands.


Example:

Imagine you have a relais in your CNC system and you want to activate it 
using a new M-code, say for example M101. And turning it off using another 
code, for example M102.

Consider you have this relais commanded by PIN 8 of the parallel port.
So, we are going to create two scripts, one named "M101" and other named 
"M102". You MUST place those scripts in the directory indicated in your .ini 
file as PROGRAM_PREFIX (in the [DISPLAY] section), those scripts MUST be 
executable, so don't forget to add the permission.


The first script (M101) will be like that:

#! /bin/bash
halcmd setp parport.0.pin-08-out 1

And the second (M102) will be like that:

#! /bin/bash
halcmd setp parport.0.pin-08-out 2

Save and try (make sure you don't have any signal hooked to pin 08). Looking 
with halmeter at pin 08 you will see it change from TRUE to FALSE using M101 
or M102 in the MDI command line.


This is the simplest use you can imagine, but you can do very complex thing. 
First you can execute an entire and complex HAL file instead of a single 
command always using a simple bash script and you can easily interact with a 
PLC if that is what you need. Second, you can make a complex program also in 
C or in any programming language you want, and EMC2 will run that program 
when the interpreter encounter the code, the G-code placed after that will 
be executed only when the program is terminated.


I hope this helps. I've tested it and works, so I'm sure it can be done. If 
you have still difficults, please feel free to contact me again.


Regards,

Manfredi


My websites: www.m24-pro.com
 www.emc2cnc.altervista.org






From: "Jaime Pozo" <[EMAIL PROTECTED]>
Reply-To: "Enhanced Machine Controller (EMC)" 


To: emc-users@lists.sourceforge.net
Subject: [Emc-users] M1xx code and PLC
Date: Mon, 23 Jul 2007 11:25:54 -0400

Hello,

I need to implement some M1xx codes, in order to handle
some jobs programmed in a PLC,
but i don´t find more information about how it works (M1xx).

Can somebody help me?


Many thanks,

JJ




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Re: [Emc-users] Lathe Spindle Speed Control?

[RogerN]

For the 850 RPM gear range, I need 2-3 second decel, for the 2800 RPM, I 
need around 8 second decel.  I could use a drive input to select between 
motor 1 and motor 2 and have different decel times for the motors.

Thanks
Roger Neal


- Original Message - 
From: "Sam Sokolik" <[EMAIL PROTECTED]>
To: "Enhanced Machine Controller (EMC)" 

Sent: Wednesday, July 25, 2007 1:13 PM
Subject: Re: [Emc-users] Lathe Spindle Speed Control?


> If it where me...  I would put those limits into the vfd (spindle
> accel/decel)  unless your going to try to close the spindle speed loop
> within emc.
>
> sam


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[Emc-users] emc2 v2.1 users handbook

[Dennis Coleman]

I think I need to begin in the beginning.  I have downloaded the
user's handbook twice.  When I try to open the download from my desktop I
get this message.  "Adobe reader could not open
'emc2-unbutu6.06-desktop-i386.iso' because it is either not a supported file
type or because the file has been damaged [for example, it was sent as an
email attachment and wasn't correctly decoded]."  

Can some suggest a course of action?

 

Dennis 

 

Motion Products, Inc.

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Re: [Emc-users] emc2 v2.1 users handbook

[Sam Sokolik]

what you are downloading is the emc2 live cd image.  You would use your cd 
burning software to create a bootable live cd that can be used to evaluate or 
install emc.  (you can access the docs also.  

Otherwide the docs are always here
http://www.linuxcnc.org/docs/

sam

  - Original Message - 
  From: Dennis Coleman 
  To: emc-users@lists.sourceforge.net 
  Sent: Wednesday, July 25, 2007 1:01 PM
  Subject: [Emc-users] emc2 v2.1 users handbook


  I think I need to begin in the beginning.  I have downloaded the 
user's handbook twice.  When I try to open the download from my desktop I get 
this message.  "Adobe reader could not open 'emc2-unbutu6.06-desktop-i386.iso' 
because it is either not a supported file type or because the file has been 
damaged [for example, it was sent as an email attachment and wasn't correctly 
decoded]."  

  Can some suggest a course of action?

   

  Dennis 

   

  Motion Products, Inc.



--


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[Emc-users] Lathe Spindle Speed Control?

[RogerN]

I have my VFD forward and reverse connected to the M5i20 through the 
7i37 board, M3 & M4 works as they should.

Now I need to connect the spindle speed control.  The basic idea is to 
get the spindle speed command to the M5i20 dac 3.  Since I have 
different gears, I would like to use my spindle encoder feedback and 
either increase or decrease the command to get the programmed speed.

Also, my drive will handle about 300-400 rpm per second deceleration 
without dynamic braking.  Are there trajectory settings for spindle 
speed?

Roger Neal


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[Emc-users] SECONDED: Dan Falck - I accept

[Dan Falck]

If elected, I would gladly serve on the emc board.  Arm twisting is 
definitely not needed here : )


Thanks,
Dan

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Re: [Emc-users] emc2 v2.1 users handbook

[Gene Heskett]

On Wednesday 25 July 2007, Dennis Coleman wrote:
>I think I need to begin in the beginning.  I have downloaded the
>user's handbook twice.  When I try to open the download from my desktop I
>get this message.  "Adobe reader could not open
>'emc2-unbutu6.06-desktop-i386.iso' because it is either not a supported file
>type or because the file has been damaged [for example, it was sent as an
>email attachment and wasn't correctly decoded]."
>
>Can some suggest a course of action?
>
>
Humm, somehow that sounds like the install emc .iso, Dennis.  To be written as 
a raw write to a cdrom, booted and used as the installer.

The Handbook is IIRC, a .pdf file, and slightly out of date so use the wiki as 
the latest word in case of unresolved questions.


-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Oh no, not again.
-- Manoj Srivastava

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[Emc-users] error in lauching halmeter and halscope ( RTAPI error)

[Xuecheng Xi]

Dear Alex:

I have tried your suggestion. But  after compiling
(--enable-run-in-place) emc2.1.6, in the directory
"emc2/bin/"
there is no executable file "halscope" or "halmeter"

after I copied the old version "halscope" and "halmeter" into the
directory "emc2/bin"
I can launch them. I don't know where is the new halscope and halmeter
which are from emc2.1.6?

thanks
Xuecheng

> Hi Xuecheng,
>
> when you get a version mismatch it's basicly telling you you're running the
> wrong hal(scope,meter).
>
> You have an installed emc2 (the one with the lower magic number), and a
> run-in-pace version of emc2.
>
> When you run the installed emc2 (e.g. from the menu), you also need to run
> the installed halscope or halmeter:
>
> simply type 'halscope' or '/usr/bin/halscope'
>
> When you run the local run-in-place version, then you need to run the
> appropiate halscope:
>
> cd /home/user/emc2-trunk/
> scripts/emc &
> bin/halscope
>
> You can't mix&match the two of them.
>
> Regards,
> Alex
>

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