Re: [Emc-users] EMC and HobbyCNC

[Kim Mortensen]

Cool,

Nice to know that others have had same issues

Best Regards
Kim Mortensen


2008/9/3, Doug Goff <[EMAIL PROTECTED]>:
>
> I used this post -
>
> http://www.cnczone.com/forums/showpost.php?p=382237&postcount=1
>
> to modify one of my systems.  It completely eliminated the startup issues
> associated with idle current reduction.  I do a lot of operations where Z
> might not make a move for more than 10 seconds - and it would lose steps.
> I need to do this mod on the other router when I get time.
> ** REMEMBER to be very careful when making mods to the HobbyCNC board.  It
> is very unforgiving.
> Also John, the settings on the Wiki work with my system as well.
>
>
> Regards,
>
>Doug Goff
>
>[EMAIL PROTECTED]
>www.woodntractors.com
>Scale Tractors In Wood
>
>
>
>
>
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Re: [Emc-users] Problems with axises in auto and mdi

[andyholcomb]

I went through the setup; but no where was there a spot to put in the 
backlash. How/where so I set the backlash?

Andy

Andy Holcomb wrote:
> I will have to reply to this later tonight, my machine is not here, I 
> do know that I installed that computer about 4,5,6 months ago from a 
> freshly downloaded CD from EMC (latest version) and it sat in my house 
> till I got it out to the machine a couple of weeks ago. I don't know 
> what I used to set up the hal pins, this is what I will look at 
> tonight. I think I created a shortcut that is going to the (ini?)files 
> that I am using to start emc. Tonight I will go and clear my config 
> files and run the setup per the tutorial John pointed me to and I will 
> let you know the results.  On my other setups I have not had to run 
> this I have just went in and modified the .ini file and stayed with 
> what thought was a standard pin out on the LPT port.
>
> Andy
>
> Ray Henry wrote:
>> On Wed, 2008-09-03 at 09:17 -0500, Andy Holcomb wrote:
>>   
>>> These are the hal files that I got with the install cd.  I went through 
>>> the hal setup gui and changed the pinout on the lpt port and that was 
>>> all I changed in the hal files.
>>>
>>> Let see if this one goes out right on the reply-to
>>> 
>>
>> Looks like it went to the list only.  
>>
>> Let me back up a bit because I've just come into this.  
>>
>>   1 -- You installed from a CD.  Was it 6.06 or 8.08?
>>
>>   2 -- You started stepconf wizard from the menu and setup some
>>parport pins?
>>
>>   3 -- You started EMC2 from the menu?
>>
>> And you are getting some aberrant behavior from the motors.  
>>
>> If these are the three steps you took to get going, the configuration
>> you are running from is in your home directory under
>> emc2/configs/my-mill.  If you changed the name during the stepconf
>> session then it will be under that changed name.
>>
>> Rayh
>>
>>
>>
>>
>>
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Re: [Emc-users] EMC and HobbyCNC

[Stephen Wille Padnos]

BRIAN GLACKIN wrote:

> Based on your description, I think that is what was causing me to lose 
> steps.  I was able to start the router in motion, drop down to a 
> cutting position and then begin cutting.  Since I was cutting at 1 
> depth for more than 10 seconds, I always seemed to miss steps on the 
> Z.  I would notice that the when the g0 would pull the router up then 
> out, it would stall the z avis then proceed to plow m router through 
> the workpiece back to 0,0,0.
>  
> This sounds like the activation could easily be initiated by HAL and 
> sent across the parrallel port to the board.  Looks like I need to 
> read up on code writing not one of my forte's.

Thanks for reminding me about this - there's no need to write any code.

The motion controller already has a set of drive enables which are 
turned on whenever the motors are under motion control.  This includes 
when they're supposed to stay still.  The pins are named 
axis.#.amp-enable-out, where # is replaced with the axis number.  All 
that needs to be done is to connect the enable line to a parallel port 
output instead of a switch (with any buffering needed so that parport 
can drive the signal).  You can do separate enables for each motor, or 
use any amp-enable-out for all motors.  You make the HAL connection like so:
net motor-enables axis.0.amp-enable-out parport.0.pin-09-out (or 
wherever you connected it).

In fact, if you used stepconf to set up your machine, amp enable is one 
of the available output assuignments.

- Steve


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Re: [Emc-users] EMC and HobbyCNC

[BRIAN GLACKIN]

Based on your description, I think that is what was causing me to lose
steps.  I was able to start the router in motion, drop down to a cutting
position and then begin cutting.  Since I was cutting at 1 depth for more
than 10 seconds, I always seemed to miss steps on the Z.  I would notice
that the when the g0 would pull the router up then out, it would stall the z
avis then proceed to plow m router through the workpiece back to 0,0,0.

This sounds like the activation could easily be initiated by HAL and sent
across the parrallel port to the board.  Looks like I need to read up on
code writing not one of my forte's.

Thanks for the post.

On Wed, Sep 3, 2008 at 5:05 PM, Doug Goff <[EMAIL PROTECTED]> wrote:

> I used this post -
>
> http://www.cnczone.com/forums/showpost.php?p=382237&postcount=1
>
> to modify one of my systems.  It completely eliminated the startup issues
> associated with idle current reduction.  I do a lot of operations where Z
> might not make a move for more than 10 seconds - and it would lose steps.
> I need to do this mod on the other router when I get time.
> ** REMEMBER to be very careful when making mods to the HobbyCNC board.  It
> is very unforgiving.
> Also John, the settings on the Wiki work with my system as well.
>
>
> Regards,
>
>Doug Goff
>
>[EMAIL PROTECTED]
>www.woodntractors.com
>Scale Tractors In Wood
>
>
>
>
>
> -
>  This SF.Net email is sponsored by the Moblin Your Move Developer's
> challenge
> Build the coolest Linux based applications with Moblin SDK & win great
> prizes
> Grand prize is a trip for two to an Open Source event anywhere in the world
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Re: [Emc-users] Puma560

[Jon Elson]

Jonathan Hancock wrote:
> Hi all - just a quick update on my Puma project.
>  
> As a thought, the output from the original encoders is a sin/cos 
> waveform (to see goto http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I 
> will try to convert this low level signal into a ttl level square wave 
> using an op-amp. The encoder has a pair of leds and photo sensors in.
>  
OK, looking at the very asymmetric waveforms, I'm guessing these 
are just raw photosensor outputs, and not real sine/cosine 
signals ready to be interpolated.  I can't tell the voltage 
levels from the pic, but a simple comparator circuit should be 
able to convert to TTL levels.

Don't use an op-amp, they are too slow and don't have a 
"digital" output stage.  Use a comparator such as the LM193.

> I am looking at using a pic adc to gain limit and homing signals from 
> the pots on the back of the motors. This is looking quite promissing.
>  
> I've installed ubuntu and emc2 on my machine and now baffled!
>  
> Jon - am I sorting the correct things out to interface to your cards?
I guess so.  You would need digital A, B and Z signals, and a 
contact closure or opto-isolator output for the limit signals, 
and home switch simulation.

Jon

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Re: [Emc-users] Puma560

[sam sokolik]

I will look.  I have some schematics of the control also.

sam
  - Original Message - 
  From: Jonathan Hancock 
  To: Enhanced Machine Controller (EMC) 
  Sent: Wednesday, September 03, 2008 5:04 PM
  Subject: Re: [Emc-users] Puma560


  Here are some more photos of the motor I am investigating:


  http://www.flickr.com/photos/[EMAIL PROTECTED]/


  Sam - it sounds like you have a manual :)  Have you found any info on the 
voltage the encoder (and pot) should be working at? I have used 5V to be safe...


  Thanks


  Jonathan





  - Original Message 
  From: sam sokolik <[EMAIL PROTECTED]>
  To: Enhanced Machine Controller (EMC) 
  Sent: Wednesday, 3 September, 2008 10:26:33 PM
  Subject: Re: [Emc-users] Puma560

  the manual says there is a 116 to 1 gear reduction in each servo that 
  run the potentiometer. :)

  sam

  Jonathan Hancock wrote:
  > Hi Jim. 
  >
  > I forgot to mention there is an index o/p from the encoders also. The 
  > travel of the pots on the motors are geared to match the complete 
  > range of the joint so I can use the far ends of the resistance range 
  > for limits (or any point in between) and a centre point for homing. 
  >
  > When I get a minute I'll post some more photos to help everyone get an 
  > idea of what I'm talking about...
  >
  >
  >
  > - Original Message 
  > From: Jim Coleman <[EMAIL PROTECTED]>
  > To: Enhanced Machine Controller (EMC) 
  > Sent: Wednesday, 3 September, 2008 10:05:29 PM
  > Subject: Re: [Emc-users] Puma560
  >
  > possibility of replacing the encoders with one with index?
  >
  > would there be enough room on the us digital discs to drill a couple 
  > holes closer to the center for the purpose of limits?
  >
  > On Wed, Sep 3, 2008 at 3:44 PM, sam sokolik <[EMAIL PROTECTED] 
  > > wrote:
  >
  >Well that sucks :)  my plan is to make some inexpensive h-bridges
  >and using one of the mesa cards we have to run it.  40v and a few
  >amps should be easy.  I am very surprised that it is sin/cos. 
  >Darn.  I will  keep tabs on this  thread for sure .
  >
  >Thanks again. 
  >sam
  >
  >Jonathan Hancock wrote:
  >>Hi all - just a quick update on my Puma project.
  >>  
  >>As a thought, the output from the original encoders is a sin/cos
  >>waveform (to see goto
  >>http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to
  >>convert this low level signal into a ttl level square wave using
  >>an op-amp. The encoder has a pair of leds and photo sensors in.
  >>  
  >>I am looking at using a pic adc to gain limit and homing signals
  >>from the pots on the back of the motors. This is looking quite
  >>promissing.
  >>  
  >>I've installed ubuntu and emc2 on my machine and now baffled!
  >>  
  >>Jon - am I sorting the correct things out to interface to your cards?
  >>  
  >>I'll keep you posted... 
  >>  
  >>Jonathan
  >>
  >>  
  >>
  >>
  >>
  >>
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  >>
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prizes
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Re: [Emc-users] Puma560

[Jonathan Hancock]

Here are some more photos of the motor I am investigating:

http://www.flickr.com/photos/[EMAIL PROTECTED]/

Sam - it sounds like you have a manual :)  Have you found any info on the 
voltage the encoder (and pot) should be working at? I have used 5V to be safe...

 Thanks

Jonathan




- Original Message 
From: sam sokolik <[EMAIL PROTECTED]>
To: Enhanced Machine Controller (EMC) 
Sent: Wednesday, 3 September, 2008 10:26:33 PM
Subject: Re: [Emc-users] Puma560

the manual says there is a 116 to 1 gear reduction in each servo that 
run the potentiometer. :)

sam

Jonathan Hancock wrote:
> Hi Jim. 
>
> I forgot to mention there is an index o/p from the encoders also. The 
> travel of the pots on the motors are geared to match the complete 
> range of the joint so I can use the far ends of the resistance range 
> for limits (or any point in between) and a centre point for homing. 
>
> When I get a minute I'll post some more photos to help everyone get an 
> idea of what I'm talking about...
>
>
>
> - Original Message 
> From: Jim Coleman <[EMAIL PROTECTED]>
> To: Enhanced Machine Controller (EMC) 
> Sent: Wednesday, 3 September, 2008 10:05:29 PM
> Subject: Re: [Emc-users] Puma560
>
> possibility of replacing the encoders with one with index?
>
> would there be enough room on the us digital discs to drill a couple 
> holes closer to the center for the purpose of limits?
>
> On Wed, Sep 3, 2008 at 3:44 PM, sam sokolik <[EMAIL PROTECTED] 
> > wrote:
>
> Well that sucks :)  my plan is to make some inexpensive h-bridges
> and using one of the mesa cards we have to run it.  40v and a few
> amps should be easy.  I am very surprised that it is sin/cos. 
> Darn.  I will  keep tabs on this  thread for sure .
>
> Thanks again. 
> sam
>
> Jonathan Hancock wrote:
>> Hi all - just a quick update on my Puma project.
>>  
>> As a thought, the output from the original encoders is a sin/cos
>> waveform (to see goto
>>http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to
>> convert this low level signal into a ttl level square wave using
>> an op-amp. The encoder has a pair of leds and photo sensors in.
>>  
>> I am looking at using a pic adc to gain limit and homing signals
>> from the pots on the back of the motors. This is looking quite
>> promissing.
>>  
>> I've installed ubuntu and emc2 on my machine and now baffled!
>>  
>> Jon - am I sorting the correct things out to interface to your cards?
>>  
>> I'll keep you posted... 
>>  
>> Jonathan
>>
>>  
>>
>>
>> 
>> -
>> This SF.Net email is sponsored by the Moblin Your Move
>> Developer's challenge Build the coolest Linux based applications
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>> to an Open Source event anywhere in the world
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>> 
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-

Re: [Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation

[Chuck Rice]

I like your distinction of GPL OS vs OS, but it would also be nice if  
you included a column for the supported Operating Systems. A column  
for each OS, and a tag in that column such as "F - Fully supported",  
"M - Might Compile", "X - Known not to work", etc. -Chuck-


On Sep 3, 2008, at 11:03 AM, Karl Schmidt wrote:

> lode leroy wrote:
>>
>>  Hi folks,
>>
>>  I just released a GPL 3D CNC Toolpath Generation program.
>
> Cool .. I've been putting a list of CAD and CAM programs that run on  
> Linux together here:
>
> http://wiki.xtronics.com/index.php/CAD_CAM
>
> Let me know if I've missed other ones..
>
>
> 
> Karl Schmidt EMail [EMAIL PROTECTED]
> Transtronics, Inc. WEB http://xtronics.com
> 3209 West 9th StreetPh (785) 841-3089
> Lawrence, KS 66049 FAX (785) 841-0434
>
> Experience is something I never get,
> until just after I need it.
>
> 
>
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Re: [Emc-users] Puma560

[sam sokolik]

the manual says there is a 116 to 1 gear reduction in each servo that 
run the potentiometer. :)

sam

Jonathan Hancock wrote:
> Hi Jim. 
>
> I forgot to mention there is an index o/p from the encoders also. The 
> travel of the pots on the motors are geared to match the complete 
> range of the joint so I can use the far ends of the resistance range 
> for limits (or any point in between) and a centre point for homing. 
>
> When I get a minute I'll post some more photos to help everyone get an 
> idea of what I'm talking about...
>
>
>
> - Original Message 
> From: Jim Coleman <[EMAIL PROTECTED]>
> To: Enhanced Machine Controller (EMC) 
> Sent: Wednesday, 3 September, 2008 10:05:29 PM
> Subject: Re: [Emc-users] Puma560
>
> possibility of replacing the encoders with one with index?
>
> would there be enough room on the us digital discs to drill a couple 
> holes closer to the center for the purpose of limits?
>
> On Wed, Sep 3, 2008 at 3:44 PM, sam sokolik <[EMAIL PROTECTED] 
> > wrote:
>
> Well that sucks :)  my plan is to make some inexpensive h-bridges
> and using one of the mesa cards we have to run it.  40v and a few
> amps should be easy.  I am very surprised that it is sin/cos. 
> Darn.  I will  keep tabs on this  thread for sure .
>
> Thanks again. 
> sam
>
> Jonathan Hancock wrote:
>> Hi all - just a quick update on my Puma project.
>>  
>> As a thought, the output from the original encoders is a sin/cos
>> waveform (to see goto
>> http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to
>> convert this low level signal into a ttl level square wave using
>> an op-amp. The encoder has a pair of leds and photo sensors in.
>>  
>> I am looking at using a pic adc to gain limit and homing signals
>> from the pots on the back of the motors. This is looking quite
>> promissing.
>>  
>> I've installed ubuntu and emc2 on my machine and now baffled!
>>  
>> Jon - am I sorting the correct things out to interface to your cards?
>>  
>> I'll keep you posted... 
>>  
>> Jonathan
>>
>>  
>>
>>
>> 
>> -
>> This SF.Net email is sponsored by the Moblin Your Move
>> Developer's challenge Build the coolest Linux based applications
>> with Moblin SDK & win great prizes Grand prize is a trip for two
>> to an Open Source event anywhere in the world
>> http://moblin-contest.org/redirect.php?banner_id=100&url=/
>> 
>> 
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Re: [Emc-users] Puma560

[Jonathan Hancock]

Hi Jim. 


I forgot to mention there is an index o/p from the encoders also. The travel of 
the pots on the motors are geared to match the complete range of the joint so I 
can use the far ends of the resistance range for limits (or any point in 
between) and a centre point for homing. 

When I get a minute I'll post some more photos to help everyone get an idea of 
what I'm talking about...





- Original Message 
From: Jim Coleman <[EMAIL PROTECTED]>
To: Enhanced Machine Controller (EMC) 
Sent: Wednesday, 3 September, 2008 10:05:29 PM
Subject: Re: [Emc-users] Puma560


possibility of replacing the encoders with one with index?

would there be enough room on the us digital discs to drill a couple holes 
closer to the center for the purpose of limits?


On Wed, Sep 3, 2008 at 3:44 PM, sam sokolik <[EMAIL PROTECTED]> wrote:

Well that sucks :)  my plan is to make some inexpensive h-bridges and
using one of the mesa cards we have to run it.  40v and a few amps
should be easy.  I am very surprised that it is sin/cos.  Darn.  I
will  keep tabs on this  thread for sure .

Thanks again.  
sam

Jonathan Hancock wrote: 
Hi all - just a quick update on my Puma project.
 
As a thought, the output from the original encoders is a sin/cos
waveform (to see goto http://www.flickr.com/photos/[EMAIL PROTECTED]/ ).
I will try to convert this low level signal into a ttl level square
wave using an op-amp. The encoder has a pair of leds and photo sensors
in.
 
I am looking at using a pic adc to gain limit and homing signals
from the pots on the back of the motors. This is looking quite
promissing.
 
I've installed ubuntu and emc2 on my machine and now baffled!
 
Jon - am I sorting the correct things out to interface to your
cards?
 
I'll keep you posted... 

 
Jonathan

 





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Re: [Emc-users] EMC and HobbyCNC

[Doug Goff]

I used this post -

http://www.cnczone.com/forums/showpost.php?p=382237&postcount=1

to modify one of my systems.  It completely eliminated the startup issues 
associated with idle current reduction.  I do a lot of operations where Z might 
not make a move for more than 10 seconds - and it would lose steps.
I need to do this mod on the other router when I get time.
** REMEMBER to be very careful when making mods to the HobbyCNC board.  It is 
very unforgiving.
Also John, the settings on the Wiki work with my system as well.


Regards,

Doug Goff

[EMAIL PROTECTED]
www.woodntractors.com
Scale Tractors In Wood





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Re: [Emc-users] Puma560

[Jim Coleman]

possibility of replacing the encoders with one with index?

would there be enough room on the us digital discs to drill a couple holes
closer to the center for the purpose of limits?

On Wed, Sep 3, 2008 at 3:44 PM, sam sokolik <[EMAIL PROTECTED]> wrote:

>  Well that sucks :)  my plan is to make some inexpensive h-bridges and
> using one of the mesa cards we have to run it.  40v and a few amps should be
> easy.  I am very surprised that it is sin/cos.  Darn.  I will  keep tabs on
> this  thread for sure .
>
> Thanks again.
> sam
>
> Jonathan Hancock wrote:
>
>   Hi all - just a quick update on my Puma project.
>
> As a thought, the output from the original encoders is a sin/cos waveform
> (to see goto http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to
> convert this low level signal into a ttl level square wave using an op-amp.
> The encoder has a pair of leds and photo sensors in.
>
> I am looking at using a pic adc to gain limit and homing signals from the
> pots on the back of the motors. This is looking quite promissing.
>
> I've installed ubuntu and emc2 on my machine and now baffled!
>
> Jon - am I sorting the correct things out to interface to your cards?
>
> I'll keep you posted...
>
> Jonathan
>
>
>
>
> --
>
> -
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> PROTECTED]://lists.sourceforge.net/lists/listinfo/emc-users
>
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Re: [Emc-users] Puma560

[sam sokolik]

Well that sucks :)  my plan is to make some inexpensive h-bridges and 
using one of the mesa cards we have to run it.  40v and a few amps 
should be easy.  I am very surprised that it is sin/cos.  Darn.  I will  
keep tabs on this  thread for sure .


Thanks again. 
sam


Jonathan Hancock wrote:

Hi all - just a quick update on my Puma project.
 
As a thought, the output from the original encoders is a sin/cos 
waveform (to see goto http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I 
will try to convert this low level signal into a ttl level square wave 
using an op-amp. The encoder has a pair of leds and photo sensors in.
 
I am looking at using a pic adc to gain limit and homing signals from 
the pots on the back of the motors. This is looking quite promissing.
 
I've installed ubuntu and emc2 on my machine and now baffled!
 
Jon - am I sorting the correct things out to interface to your cards?
 
I'll keep you posted... 
 
Jonathan


 





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Re: [Emc-users] Puma560

[Peter C. Wallace]

On Wed, 3 Sep 2008, Jonathan Hancock wrote:

> Date: Wed, 3 Sep 2008 19:27:43 + (GMT)
> From: Jonathan Hancock <[EMAIL PROTECTED]>
> Reply-To: "Enhanced Machine Controller (EMC)"
> 
> To: "Enhanced Machine Controller (EMC)" 
> Subject: Re: [Emc-users] Puma560
> 
> Hi all - just a quick update on my Puma project.

>As a thought, the output from the original encoders is a sin/cos waveform (to 
>see goto http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to 
>convert 
>this low level signal into a ttl level square wave using an op-amp. The 
>encoder has a pair of leds and photo sensors in.

You will lose a lot of resolution this way! Im sure those encoders are SIN/COS 
for a reason.


>I am looking at using a pic adc to gain limit and homing signals from the
>pots on the back of the motors. This is looking quite promissing.

Maybe you could use that same pic to interpolate the sin/cos signals...

>I've installed ubuntu and emc2 on my machine and now baffled!
> 
>Jon - am I sorting the correct things out to interface to your cards?
> 
>I'll keep you posted...


Jonathan

Peter Wallace
Mesa Electronics

(\__/)
(='.'=) This is Bunny. Copy and paste bunny into your
(")_(") signature to help him gain world domination.


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Re: [Emc-users] Puma560

[Jonathan Hancock]

Hi all - just a quick update on my Puma project.
 
As a thought, the output from the original encoders is a sin/cos waveform (to 
see goto http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to 
convert this low level signal into a ttl level square wave using an op-amp. The 
encoder has a pair of leds and photo sensors in.
 
I am looking at using a pic adc to gain limit and homing signals from the pots 
on the back of the motors. This is looking quite promissing.
 
I've installed ubuntu and emc2 on my machine and now baffled!
 
Jon - am I sorting the correct things out to interface to your cards?
 
I'll keep you posted... 

 
Jonathan


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Re: [Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation

[Alex Joni]

You're probably aware of our own list :)
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Cam

Regards,
Alex

- Original Message - 
From: "Karl Schmidt" <[EMAIL PROTECTED]>
To: "Enhanced Machine Controller (EMC)" 
Sent: Wednesday, September 03, 2008 7:03 PM
Subject: Re: [Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation


> lode leroy wrote:
>>
>>   Hi folks,
>>
>>   I just released a GPL 3D CNC Toolpath Generation program.
>
> Cool .. I've been putting a list of CAD and CAM programs that run on Linux 
> together here:
>
> http://wiki.xtronics.com/index.php/CAD_CAM
>
> Let me know if I've missed other ones..
>
>
> 
> Karl Schmidt EMail [EMAIL PROTECTED]
> Transtronics, Inc. WEB http://xtronics.com
> 3209 West 9th StreetPh (785) 841-3089
> Lawrence, KS 66049 FAX (785) 841-0434
>
> Experience is something I never get,
> until just after I need it.
>
> 
>
> -
> This SF.Net email is sponsored by the Moblin Your Move Developer's 
> challenge
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> prizes
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> world
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No virus found in this incoming message.
Checked by AVG - http://www.avg.com
Version: 8.0.169 / Virus Database: 270.6.14/1647 - Release Date: 02.09.2008 
06:02


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Re: [Emc-users] Problems with axises in auto and mdi

[Andy Holcomb]

Thanks John, I will check the house computer to see if anything is strange.
I will keep more of an eye out for this also.

Andy

John Kasunich wrote:
> Andy Holcomb wrote:
>   
>> I only get one copy, there is no choice
>> 
>
> I just checked your list subscription - you have "Avoid duplicate 
> messages" turned on.  This is the description of that setting:
>
> "When you are listed explicitly in the To: or Cc: headers of a list 
> message, you can opt to not receive another copy from the mailing list. 
> Select Yes to avoid receiving copies from the mailing list; select No to 
> receive copies. "
>
> So, we are dealing with confusion caused by various settings - not 
> deliberate rudeness on anyone's part.
>
> Your messages are sent with your name added to the "reply to" (I don't 
> know how or why that is happening, I suspect your mail client settings.)
>
> That results in a reply being sent directly to you as well as to the 
> list.  Then, the "avoid duplicates" setting does NOT send you the list 
> version.  So you are guaranteed to respond to the "wrong" one, and take 
> the thread off-list without intending to.
>
> Aren't computers fun?  ;-/
>
> Regards,
>
> John Kasunich
>
> -
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Re: [Emc-users] Problems with axises in auto and mdi

[John Kasunich]

Andy Holcomb wrote:
> 
> I only get one copy, there is no choice

I just checked your list subscription - you have "Avoid duplicate 
messages" turned on.  This is the description of that setting:

"When you are listed explicitly in the To: or Cc: headers of a list 
message, you can opt to not receive another copy from the mailing list. 
Select Yes to avoid receiving copies from the mailing list; select No to 
receive copies. "

So, we are dealing with confusion caused by various settings - not 
deliberate rudeness on anyone's part.

Your messages are sent with your name added to the "reply to" (I don't 
know how or why that is happening, I suspect your mail client settings.)

That results in a reply being sent directly to you as well as to the 
list.  Then, the "avoid duplicates" setting does NOT send you the list 
version.  So you are guaranteed to respond to the "wrong" one, and take 
the thread off-list without intending to.

Aren't computers fun?  ;-/

Regards,

John Kasunich

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Re: [Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation

[Karl Schmidt]

lode leroy wrote:
> 
>   Hi folks,
>   
>   I just released a GPL 3D CNC Toolpath Generation program.

Cool .. I've been putting a list of CAD and CAM programs that run on Linux 
together here:

http://wiki.xtronics.com/index.php/CAD_CAM

Let me know if I've missed other ones..



Karl Schmidt EMail [EMAIL PROTECTED]
Transtronics, Inc. WEB http://xtronics.com
3209 West 9th StreetPh (785) 841-3089
Lawrence, KS 66049 FAX (785) 841-0434

Experience is something I never get,
until just after I need it.



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Re: [Emc-users] Problems with axises in auto and mdi

[Andy Holcomb]

Jeff Epler wrote:
> I believe that what John is doing is known as a "courtesy copy": he
> sends a message to the list, and he sends a copy directly to you.
> Depending which one you reply to (your personal copy or the list copy),
> a different default reply address will be offered.
>   
I only get one copy, there is no choice
> The "courtesy copy" is especially useful to people who choose digest
> mode to receive the list, because they the courtesy copy immediately,
> before the next digest message is sent.
>   
Understand
> I had never considered that to people unfamiliar with the practice that
> the "courtesy copy" would seem like an invitation to take the
> conversation private.  I am sure John did not intend to create this
> confusion with you.
>   
Again only one copy not two, for some reason things got messed up, I 
will take all the blame, ever bit of it, it is all and I mean, all my 
fault, I am sorry John.
Andy
> Jeff
>
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Re: [Emc-users] Problems with axises in auto and mdi

[John Kasunich]

Jeff Epler wrote:
> I believe that what John is doing is known as a "courtesy copy": he
> sends a message to the list, and he sends a copy directly to you.
> Depending which one you reply to (your personal copy or the list copy),
> a different default reply address will be offered.
> 
> The "courtesy copy" is especially useful to people who choose digest
> mode to receive the list, because they the courtesy copy immediately,
> before the next digest message is sent.
> 
>

I am not sending courtesy copies - I am simply hitting reply.  I just 
checked a bunch of EMC mailing list messages in my "sent" folder.  With 
the exception of this thread, all of them were sent to the list only.

Then I looked at the first message of this thread, from Andy.  The 
"reply-to" field has both Andy's address _and_ the mailing list.  That 
is not the normal setting for mailing list mail.  I looked at the first 
messages of several other threads, and the reply-to field only has the 
list address.

Andy added his direct address to the reply-to field of the very first 
message in this thread - I don't know why.  That has propagated through 
the entire thread.  Replies to on-list messages went to the list like 
they were supposed to, but an extra copy went direct to Andy.  When he 
replied to that extra copy instead of the list copy, the reply did NOT 
go to the list.  Once that happened, every response to that reply was 
also off-list.

Regards,

John Kasunich





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[Emc-users] FW: EMC and HobbyCNC

[Kim Mortensen]

FYI

-Original Message-
From: Kim Mortensen [mailto:[EMAIL PROTECTED]
Sent: 3. september 2008 17:50
To: John Thornton
Subject: RE: [Emc-users] EMC and HobbyCNC


John, I dont have any pictures, so Ill just type it..

Assumptions:
You have a "HobbyCNC PRO REV 1" board , and you are experiencing problems
when running your motors after they have been idle for more than 10 seconds.
The problems you are seeing with your motors are lost steps/irrattic running
compared to normal ONLY after they have been idle for more than 10 seconds.
The irratic runnin can be heard by a brief rough motor start at startup, but
quickly turns ok after a fraction of a second.

What I believe is happening:
Each axis has a motor idle circuit, that is intended to lower the power for
the motors (If J4 is not installed), but also switch out the sync
functionality of the chip. Turning off the sync functionaliy is used as
described in the data sheet for the bip mainly to reduce noise from the
motors when they are in hold mode (not running). the Sync function does some
syncronisation between the Aa output and the Bb output. for more details
please read the datasheet.

So reading the datasheet, I found the following section:

/
. Chopping Synchronous Circuit
The SLA7070M series has a chopping synchronous function to protect from
abnormal noises that may occasionally occur during the motor-Hold state.
This function can be operated by setting the SYNC terminal at high level.
However, if this function is used during motor rotation, control current
does not stabilize, and therefore this may cause reduction of motor torque
or increased vibration. So, Sanken does not recommend using this function
while the motor is rotating. In addition, the synchronous circuit should be
disabled in order to control motor current properly
in case it is used other than in dual excitation state (Modes 8 and F) or
single excitation Hold state.
//

So looking at the text its clear that they do not recommend switching the
sync pin during motor operation. however the board is set up so that its the
step pulses that is used to trigger the change on the sync pin - and the
further more, the sync pin is not flipped immediately, but flipped after a
RC circuitry (R9+C15 on X axis as example) is charged, so the enabling of
the sync is happening a slightly after the chip is recieving pulses...

In the application notes it DOES suggest to use this kind of circuitry with
clock sence and RC circuitry, but it is stated that:
... The RC time constant in the circuit should be determined by the minimum
clock frequency used... and when you build the circuitry the RC delay is set
to 10 seconds?

What I did:
I didnt care about motor noice, so I wanted to be able to controll this
myself. BEFORE the pulses would be send to the chips..

There will be many ways to fix this issue on the board, where you would
retain the auto 10 sec powerdown, but controll the sunc pin only etc etc..
but since I didnt use the powerdown function (my J4 jumper is installed), I
did it the following way.

The smith trigger/inverter chips Q8 and Q9 (74HC14D) is to be located.

On each chip, the connections going to pin 2 and to pin 12 on both Q8 and Q9
have to be cut. There are only one copper track going to each of these pins,
the other end of the copper track should end at the middle pin on the BS250P
FET sitting just by its side. - again.. this connection should be cut. ->
verify with a ohm meter or the like. (pin 2 copper track in on the bottom
side of the PCB, pin 12 copper track is on to upper side of the board)

Now take a thin wire and solder/connect the middle pin (G for Gate) of all
the 4 BS250P (Q1, Q3, Q5, Q7) fets together.

Now find a 10K resistor, and solder it to the middle pin of one of the fets
you soldered a wire to pin 7 (GND) of one of the chips.

At this state the mod is finished, but if you connect the middle of one of
the gates on (Q1, Q3, Q5, Q7) to +5V, you will switch ON the "Power down +
Sync Disable".

Naturally this means that if you pull this connection to a switch on the
front panel, you will be able to externally enable/disable this feature..
but I think mine will be keept switched off, to keep the motors running as
smoothe as possible regardless of how long time I used it last..

Last words:
I or the designer of the board will naturally not be held responsible for
any issues you may encounter under or after this modification or equipment
related to this.  I can only say that I have dont this exactly on my own
board and it fixed my problem.

I have discussed the problem with the designer of board, but as I was told
that he only used TurboCNC or MACH3, and not EMC2, he could not give me
suggestion to what the problem was, but said that it most likely was timing
isseus with EMC2.. however after increasing the values of EMC2 to above
rediculus (but would still run perfectly, but still saw this issue), I tried
to look elsewhere.. and came up with this mod

Re: [Emc-users] Problems with axises in auto and mdi

[Jeff Epler]

I believe that what John is doing is known as a "courtesy copy": he
sends a message to the list, and he sends a copy directly to you.
Depending which one you reply to (your personal copy or the list copy),
a different default reply address will be offered.

The "courtesy copy" is especially useful to people who choose digest
mode to receive the list, because they the courtesy copy immediately,
before the next digest message is sent.

I had never considered that to people unfamiliar with the practice that
the "courtesy copy" would seem like an invitation to take the
conversation private.  I am sure John did not intend to create this
confusion with you.

Jeff

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Re: [Emc-users] Problems with axises in auto and mdi

[Andy Holcomb]

I will have to reply to this later tonight, my machine is not here, I
do know that I installed that computer about 4,5,6 months ago from a
freshly downloaded CD from EMC (latest version) and it sat in my house
till I got it out to the machine a couple of weeks ago. I don't know
what I used to set up the hal pins, this is what I will look at
tonight. I think I created a shortcut that is going to the (ini?)files
that I am using to start emc. Tonight I will go and clear my config
files and run the setup per the tutorial John pointed me to and I will
let you know the results.  On my other setups I have not had to run
this I have just went in and modified the .ini file and stayed with
what thought was a standard pin out on the LPT port.

Andy

Ray Henry wrote:

  On Wed, 2008-09-03 at 09:17 -0500, Andy Holcomb wrote:
  
  
These are the hal files that I got with the install cd.  I went through 
the hal setup gui and changed the pinout on the lpt port and that was 
all I changed in the hal files.

Let see if this one goes out right on the reply-to

  
  
Looks like it went to the list only.  

Let me back up a bit because I've just come into this.  

  1 -- You installed from a CD.  Was it 6.06 or 8.08?

  2 -- You started stepconf wizard from the menu and setup some
   parport pins?

  3 -- You started EMC2 from the menu?

And you are getting some aberrant behavior from the motors.  

If these are the three steps you took to get going, the configuration
you are running from is in your home directory under
emc2/configs/my-mill.  If you changed the name during the stepconf
session then it will be under that changed name.

Rayh





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Re: [Emc-users] Problems with axises in auto and mdi

[Ray Henry]

On Wed, 2008-09-03 at 09:17 -0500, Andy Holcomb wrote:
> These are the hal files that I got with the install cd.  I went through 
> the hal setup gui and changed the pinout on the lpt port and that was 
> all I changed in the hal files.
> 
> Let see if this one goes out right on the reply-to

Looks like it went to the list only.  

Let me back up a bit because I've just come into this.  

  1 -- You installed from a CD.  Was it 6.06 or 8.08?

  2 -- You started stepconf wizard from the menu and setup some
   parport pins?

  3 -- You started EMC2 from the menu?

And you are getting some aberrant behavior from the motors.  

If these are the three steps you took to get going, the configuration
you are running from is in your home directory under
emc2/configs/my-mill.  If you changed the name during the stepconf
session then it will be under that changed name.

Rayh





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Re: [Emc-users] Problems with axises in auto and mdi

[Andy Holcomb]

John Kasunich wrote:
> andyholcomb wrote:
>
>>   Had it set to 12000, put it up 14000 to see if would fix the 
>> problem, didn't; have not changed it back; I just set it back to 12000.
>
> That change can't fix anything, but can make things worse.  If you are 
> changing stuff without knowing why, you are not going to get anywhere.
>
I was fixing my following error because you guys were complaining about 
it. If you would like me to slow my speeds down than I can try that 
tonight, all you have to do is ask.
>>> Jeff Epler tried running the config, and got a following error, because
>>> of the speed limit, and/or an acceleration limit.  He had to lower the
>>> max speed to 0.7 and raise STEPGEN_MAXACCEL to 45 just to get it to 
>>> run.
>>> When he did that, the position commands are rock-stable.
>>>
>> I did mess with my accls, I set the 20 down to 15, didn't help, 
>> reversed them that didn't help.
>
> Again, lowering accels is very unlikely to help.  You are "swirling".
>
Looked through the log of last nights IRC, just like you had asked me 
to, towards the end after they saw my config files someone said that I 
might need some more headroom on my stepgen maxaccel, so I thought I 
would try what I thought they were talking about, to see if it made a 
difference and I note back to them that it made no difference so they 
would know.
> That is a term we use at work when somebody is running around in 
> circles doing stuff without a plan.  It usually just wastes time and 
> energy, then leads to frustration.  Stop and think and understand what 
> you are doing before you do it.
>
Thanks didn't know that.
>> know what time on the chat I will see if I can get it to work.
>
> Unfortunately I won't be online most of this evening, but others will. 
> In general, evening in the USA time zones is the best, although USA 
> daytime/Europe evenings works fairly well too.
>
> One thing you might want to try is to save the files you have so far 
> and try a "stepgen" configuration.  Stepgen is a tool that is intended 
> to help with simple stepper machines.  There is a nice step-by-step 
> tutorial starting here:
> http://www.distinctperspectives.com/emc2installsetup/
>
> Regards,
>
> John Kasunich
>
>
While I hope I we can get it fixed, thanks for your help so far
Andy

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Re: [Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation

[Emory Smith]

I see the docs follow the standard Linux documentation standards. NONE!
Where is PyOpenGL-3.0.0b5.tar.gz?
Nothing like that in  pycam-0.1.1.tgz and running 'python setup.py bdist_egg'
or 'python setup.py py2exe' just causes beeps and a number of 1.9MB
PostScript files to be created.

Emory

On Wed, Sep 3, 2008 at 8:03 AM, Alex Joni <[EMAIL PROTECTED]> wrote:
> And my favourite license too :)
> Anyways, I hope you get a lot of help to turn this into something as good
> and used as EMC, I am sure that a lot of people have been waiting on open
> source CAM.
>
> Alex
>
>> Looks neat, and you picked my favorite language to write it in!
>>
>> Jeff
>>
>
>
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Re: [Emc-users] Problems with axises in auto and mdi

[Andy Holcomb]

These are the hal files that I got with the install cd.  I went through 
the hal setup gui and changed the pinout on the lpt port and that was 
all I changed in the hal files.

Let see if this one goes out right on the reply-to

Andy

Ray Henry wrote:
> On Wed, 2008-09-03 at 08:58 -0500, Andy Holcomb wrote:
>   
>> John, if you look at your messages and everyone else's you will notice 
>> that all of theres have a the reply-to set up to reply to emc, all of 
>> your messages are set to you.  So if you don't want people to reply to 
>> you, you might think about fixing that.
>>
>> Be nice John if you are representing EMC.
>>
>> Andy
>> 
>
> I don't see any difference between the reply setup for John and Andy
> here.  They both have personal addys in the from and at least emc-users
> in the reply to.
>
> I saw the list of .hal files and said to myself, what the hall -- that
> won't work.  Where did you get the config that you're running from,
> Andy?
>
> Rayh
>
> To snip is hip.  Those damned ads keep adding up.
>
>
>
>
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>   

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Re: [Emc-users] Problems with axises in auto and mdi

[Ray Henry]

On Wed, 2008-09-03 at 08:58 -0500, Andy Holcomb wrote:
> John, if you look at your messages and everyone else's you will notice 
> that all of theres have a the reply-to set up to reply to emc, all of 
> your messages are set to you.  So if you don't want people to reply to 
> you, you might think about fixing that.
> 
> Be nice John if you are representing EMC.
> 
> Andy

I don't see any difference between the reply setup for John and Andy
here.  They both have personal addys in the from and at least emc-users
in the reply to.

I saw the list of .hal files and said to myself, what the hall -- that
won't work.  Where did you get the config that you're running from,
Andy?

Rayh

To snip is hip.  Those damned ads keep adding up.




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Re: [Emc-users] Problems with axises in auto and mdi

[Andy Holcomb]

John, if you look at your messages and everyone else's you will notice 
that all of theres have a the reply-to set up to reply to emc, all of 
your messages are set to you.  So if you don't want people to reply to 
you, you might think about fixing that.

Be nice John if you are representing EMC.

Andy

John Kasunich wrote:
> andyholcomb wrote:
>>
>>>   
>> Didn't know which files to send, sent all with the .hal  :-)  Sent 
>> the files in my user home emc config  stepper folder
>
> After I replied to this message, and my reply didn't show up on the 
> mailing list, I looked closer, and saw that you sent your message to 
> me only, and so the reply went to you only only.
>
> Do NOT do that!
>
> I understand that you are new to Linux and to the world of community 
> supported software, so I'm gonna cut you some slack.
>
> The key word is COMMUNITY.  The people who are trying to help you are 
> volunteers.  We do NOT provide one-on-one technical support - we all 
> have day jobs and other things to do, and we don't get paid for EMC 
> work.  The reason we use mailing lists and IRC is so that multiple 
> people can contribute information and ideas, and so that multiple 
> people can learn from the results.
>
> If we solve your problem in a public forum, others can read the 
> solution and benefit from it.  If we solve it in private, nobody 
> benefits but you.  Taking something to private messages is considered 
> selfish and rude.
>
> There is a place for private messages, especially if some confidential 
> information is being exchanged (but keep in mind that no email is 
> truly private - don't send passwords, etc thru email).
>
> Dammit - I just looked back through my mail, and I see that you did 
> the same thing yesterday.  Things that I thought everyone involved saw 
> were actually only sent to me, and my reply went only to you.  So the 
> other people who are looking into your problem have no clue what was 
> discussed.
>
> If you do that again, you will no longer get any help from me.
>
> Regards,
>
> John Kasunich
>
>
>
>

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Re: [Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation

[Alex Joni]

And my favourite license too :)
Anyways, I hope you get a lot of help to turn this into something as good 
and used as EMC, I am sure that a lot of people have been waiting on open 
source CAM.

Alex

> Looks neat, and you picked my favorite language to write it in!
>
> Jeff
>


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Re: [Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation

[Jeff Epler]

Looks neat, and you picked my favorite language to write it in!

Jeff

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Re: [Emc-users] Problems with axises in auto and mdi

[Jeff Epler]

On Wed, Sep 03, 2008 at 12:24:00AM -0600, [EMAIL PROTECTED] wrote:
> i just interesting, is pulse per revolution same as steps per revolution
> (x something to get steps per inch)? can i say that 1 step/pulse = 0.3125
> nanoseconds and when it comes close to 12500-13000 is is too fast?
> thanks

Yes, there is a very clear relationship between BASE_PERIOD and the
maximum number of pulses that can be created on a dumb I/O pin.

A dumb I/O pin can have no more than one transition (e.g., from LOW to
HIGH or HIGH to LOW) per BASE_PERIOD.

A "step pulse" consists of two transitions: LOW to HIGH, followed by
HIGH to LOW (assuming an active HIGH step pulse).  Therefore it takes
two BASE_PERIODs.

So for a BASE_PERIOD 'b' nanoseconds, the maximum step rate is 2*b
nanoseconds, and the maximum step frequency is '1e9/(2*b)' Hz.

Google can also find this number for you, if you enter the search
1/(2*14000 ns) in Hz
that's different than the '1e9/2*b' formula I showed above, because in
the first case I accounted for the "nano" prefix by hand (nano=1e-9,
1/nano=1e9) and in the second case google accounted for it
automatically.

You can also find this in the unix program 'units' (which you can
install by selecting the package 'units' in synaptic):
$ units '1/(2*14000ns)' Hz
* 35714.286
(As an aside, I can't recommend these two tools enough when it comes to
performing computations on real-world quantities.  Particularly units,
since it automatically carries units through the computation and
verifies that they match the desired result units:
$ units '(5V)^2/1 ohm' 'A'   # Error: quantity is actually in watts
conformability error
25 kg m^2 / s^3
1 A
)

When emc uses smart hardware, this relationship between BASE_PERIOD and
the maximum number of transitions on an output pin is broken.  For
instance, Jon Elson specifies that his step generation cards can
generate step waveforms up to 5MHz (limited to 300kHz at the board
terminals, presumably due to filtering, and/or isolation designed into
the board).  That rate can be achieved regardless of emc's BASE_PERIOD.

Jeff

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Re: [Emc-users] 5 axis cinci ball test

[Stuart Stevenson]

> Message: 1
> Date: Tue, 02 Sep 2008 20:42:10 -0500
> From: Karl Schmidt <[EMAIL PROTECTED]>
> Subject: Re: [Emc-users] 5 axis cinci ball test
> To: "Enhanced Machine Controller (EMC)"
>
> Message-ID: <[EMAIL PROTECTED]>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> What interfaces are you using?
>
> Are the PID loops within EMC2?
>
>
>
> 
> Karl Schmidt EMail [EMAIL PROTECTED]
> Transtronics, Inc. WEB http://xtronics.com
> 3209 West 9th StreetPh (785) 841-3089
> Lawrence, KS 66049 FAX (785) 841-0434
>
> Truth is mighty and will prevail.
> There is nothing wrong with this, except that it ain't so.  --Mark Twain
>
Karl,
   The the tach on the end of the motor feeds back to the amps. These
are the original SCR amps. I am working to replace them with amps that
need no feedback from the motors. The encoders on the motors feed back
to EMC. The tuning is a combination of the tuning in the SCR amps
(have done no tuning on the amps) and EMC's pid. EMC is able to tune
the motion nicely. This is limited by the SCR amps but works pretty
good.
Stuart

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[Emc-users] ANNOUNCE: pycam - 3D CNC Toolpath Generation

[lode leroy]

  Hi folks,
  
  I just released a GPL 3D CNC Toolpath Generation program.
  
  You can see some screenshots of it in action at:
  http://sourceforge.net/project/screenshots.php?group_id=237831
  
  You can download it from:
  http://sourceforge.net/project/showfiles.php?group_id=237831
  
  The GUI is not very sophisticated yet... and the project website is fairly 
minimal,
  but it should be functional...
  
  Please let me know if you are trying it out and what you think...
  I'm especially interested in hearing about someone actually using it 
  to create physical objects... 
  
  The first one to do so can put a picture on the project page :-)
  
  -- lode
 

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