[Emc-users] mesa 7I43 + MPG + speed control rotary switch

2012-11-18 Thread Matthieu Patou
Hello all,

My father and I are trying to hook a MPG + a speed control rotary switch 
to a MESA 7i43 and it seems not to work as expected.
The rotary switch has 4 position to control speed increment.

We tried the configuration in PNCconf and we stumble into the following 
issues:

* most of the time we have to manipulate the speed switch in order to 
have a change on the jog reflected in axis
* most of the time we have to manipulate the jog switch in order to have 
a change on the speed switch reflected in axis

It looks like both switch are somehow interdependent, we tried to tweak 
the debounce but with no success.

Then we tried this while keeping all the physical connections in place:

* Reconfigure just the MPG with PNCconf: every thing is working on 3 
axis the motion switch behave as expected
* Reconfigure just the speed control: changing the switch position 
correctly change the speed

Do you have any clue to understand the issue we have when both the MPG 
and speed control switch are configured in PNCconf ?

Thanks !

Matthieu.

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Re: [Emc-users] mesa 7I43 + MPG + speed control rotary switch

2012-11-18 Thread Chris Morley


 
 Then we tried this while keeping all the physical connections in place:
 
 * Reconfigure just the MPG with PNCconf: every thing is working on 3 
 axis the motion switch behave as expected
 * Reconfigure just the speed control: changing the switch position 
 correctly change the speed
 
 Do you have any clue to understand the issue we have when both the MPG 
 and speed control switch are configured in PNCconf ?
 

Thanks for the bug report.
A few questions:
PNCconf has a few options that use MPG are you speaking of manual axis jogging?
Same question on speed switch - do you mean manual axis jogging increments?
if so, I use this same set up and seem not to have problems

What version of linuxcnc are you using? eg 2.5 or 2.51 etc
Could you post your .pncconf config file (not your actual config folder)

Chris M
  
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[Emc-users] 0-10V spindle control via Mesa 7i33

2012-11-18 Thread Scott Hasse
All-

My Sieg KC4S lathe conversion is moving along, and I have a question about
driving a spindle motor controller using a Mesa 7i33 servo controller.
 According to the docs, that daughter card uses sign/magnitude mode , which
will generate 0 to +10V analog out when the direction is positive and 0 to
-10 V analog.

My problem is that the drive controller has a direction input and a speed
input and the speed input is 0 to +10V regardless of direction.  My
thinking was that I could just tie the direction pin feeding to the 7i33
high and wire a different I/O pin to the direction input of the drive and
tie  that pin to the spindle direction.

Unfortunately, I can't figure out how to tie the direction pin feeding the
7i33 to high.  In the pncconf-generated configuration there is no explicit
configuration that I can see tying the spindle direction to the direction
pin expected by the 7i33.

Am I missing something obvious or is there a different way to accomplish
what I want?

Thanks!

Scott
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Re: [Emc-users] 0-10V spindle control via Mesa 7i33

2012-11-18 Thread Chris Morley


 My problem is that the drive controller has a direction input and a speed
 input and the speed input is 0 to +10V regardless of direction.  My
 thinking was that I could just tie the direction pin feeding to the 7i33
 high and wire a different I/O pin to the direction input of the drive and
 tie  that pin to the spindle direction.
 
 Unfortunately, I can't figure out how to tie the direction pin feeding the
 7i33 to high.  In the pncconf-generated configuration there is no explicit
 configuration that I can see tying the spindle direction to the direction
 pin expected by the 7i33.
 
 Am I missing something obvious or is there a different way to accomplish
 what I want?
 
 Thanks!
 
 Scott

The problem is linuxcnc does not have a pin that supplies absolute spindle 
speed.
So you must run it through an absolute component and use the spindle cw signal.

Do you use the spindle display options in PNCconf?
If you do then depending if you use spindle feedback (encoder) or not there 
will be
one of three signals available :
No feedback: absolute-spindle-vel   ( this is in RPM)
encoder:  spindle-fb-filtered-abs-rpm or spindle-fb-filtered-abs-rps

The second two are filtered but I don't imagine that matters much.
You would have to mess with the scale of the PWM gen to match input signal
units and range.

you would disconnect spindle-vel-cmd  from the spindle PWM gen and connect 
one of those signals to the PWM gen.

Then you can use spindle cw signal (selected in the mesa page) to select the 
direction
on an available output pin.

I think that should work if I didn't confuse you or me :)

Chris M


  
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Re: [Emc-users] linuxcnc 3 development whiteboard wiki page

2012-11-18 Thread Marcus Bowman
Chris,

I can't see the EDIT button on that Whiteboard. I have logged in etc but it 
remains Read-only.

How about a simple simulation button?  That's different from the Cutting 
simulation. I envisage the code running and the backplot window showing the 
result, without attempting to simulate the real workpiece. That would be a 
simulation in the single existing program, rather than a separately compiled 
simulation version of LinuxCNC.
Click to run in simulation mode; click to run for real.

Regards,

Marcus

On 15 Nov 2012, at 04:39, Chris Morley wrote:


I started a wiki page as a reference / scratch pad of ideas for linuxcnc 3.
It would be best to add your two cents here so things are not forgotten
and are all in one spot so we have a reference for discussion and planning.

Feel free to add more headings.
I think a short general statement as a minor heading then any details
under it would be a good start - I added a few things in this way.

Don't be afraid of adding your crazy idea - I'd rather see us pare down
the list then wish we had thought of an idea earlier.

Chris M
  
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Re: [Emc-users] linuxcnc 3 development whiteboard wiki page

2012-11-18 Thread Chris Morley



 From: marcus.thebowm...@virgin.net
 Date: Sun, 18 Nov 2012 22:50:46 +
 To: emc-users@lists.sourceforge.net
 Subject: Re: [Emc-users] linuxcnc 3 development whiteboard wiki page
 
 Chris,
 
 I can't see the EDIT button on that Whiteboard. I have logged in etc but it 
 remains Read-only.
 
 How about a simple simulation button?  That's different from the Cutting 
 simulation. I envisage the code running and the backplot window showing the 
 result, without attempting to simulate the real workpiece. That would be a 
 simulation in the single existing program, rather than a separately compiled 
 simulation version of LinuxCNC.
 Click to run in simulation mode; click to run for real.
 
 Regards,
 

hmm no idea what the problem is -check again later.
I will add it for now.

I think that was called dry-run on the Okuma lathe.
Everything was honoured except actual moment and I/O 
so no coolant or tool changes either.

AFAIK AXIS already sorta does this behind the scene when you load a program.
That's how it draws the picture and figures out out-of-bounds.

Chris M
  
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Re: [Emc-users] linuxcnc 3 development whiteboard wiki page

2012-11-18 Thread Jim Coleman
I think I've seen this sort of function called 'backplot' on machines I've used.

Jim


On Sun, Nov 18, 2012 at 6:07 PM, Chris Morley
chrisinnana...@hotmail.com wrote:



 From: marcus.thebowm...@virgin.net
 Date: Sun, 18 Nov 2012 22:50:46 +
 To: emc-users@lists.sourceforge.net
 Subject: Re: [Emc-users] linuxcnc 3 development whiteboard wiki page

 Chris,

 I can't see the EDIT button on that Whiteboard. I have logged in etc but it 
 remains Read-only.

 How about a simple simulation button?  That's different from the Cutting 
 simulation. I envisage the code running and the backplot window showing the 
 result, without attempting to simulate the real workpiece. That would be a 
 simulation in the single existing program, rather than a separately compiled 
 simulation version of LinuxCNC.
 Click to run in simulation mode; click to run for real.

 Regards,


 hmm no idea what the problem is -check again later.
 I will add it for now.

 I think that was called dry-run on the Okuma lathe.
 Everything was honoured except actual moment and I/O
 so no coolant or tool changes either.

 AFAIK AXIS already sorta does this behind the scene when you load a program.
 That's how it draws the picture and figures out out-of-bounds.

 Chris M

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