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Author Topic: Pause while rotary axis moves  (Read 2011 times)

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Pause while rotary axis moves
« on: December 07, 2014, 02:02:39 PM »
Hi all,

with Mach3, version .66.

My rotation axis goes crazy on Pause.
After starting again, it does silly moves.
It seems Mach forgets where it is.

I want to make 10 turns on a length of 100.
I stop at X50.
After restarting it makes again 10 turns until 100 is reached.
If I make it several times the rotation axis turns in the wrong direction.

All other things, even the feed rate compensation, do work.

See example below.

What the heck can cause this?
And what to do about it?

Thanks,
Gregor

%1(Test)
G0 Z50
G0 X0 Y0
G0 Z21
F50
G1 Z19.9
F1000
G1 X100 A3600 (pause here and un-pause)
Z10
G1 X0 A0
G0 Z50
M30

Re: Pause while rotary axis moves
« Reply #1 on: December 08, 2014, 04:16:35 PM »
Hmm, this seems to be a general problem.
Pause with A-axis in motion always results in silly moves, atleast in here.

I tried different styles of G-code for the same process.
Wrote it in subroutines to have no larger turn than 360°.
Result is, I can't run further at all after pause.

Placed variables in the C-code, calculated the commanded positions.
Pause and un-pause results in silly moves.

Is it not possible to pause and unpause a 4 axis program at all?

Or can it be a setup error?
I *think* it is all right from all what I could read in the forum.
Also I tried several setting combination.

From all what I see it is Mach3 that is not reliable in this aspect with 4 axis.
Right???

Gregor

Offline Hood

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Re: Pause while rotary axis moves
« Reply #2 on: December 08, 2014, 05:06:53 PM »
If you attach your xml I will see if I can figure out why you have problems.
Hood
Re: Pause while rotary axis moves (Solved)
« Reply #3 on: December 08, 2014, 05:10:08 PM »
Talking to myself...

Found a solution!
I replaced the mach3.exe with the one from version 3.43.07.
This is the one I had in use for years with no problem at all.

And guess what, the feed hold now works exactly as expected.
I mean the restart after feed hold of course.

Perhaps Art, Brian or Andrew should have a look at this issue.
I can test over here of course.

Gregor
Re: Pause while rotary axis moves
« Reply #4 on: December 08, 2014, 05:11:30 PM »
Hi Hood,

our messages overlapped...

No need to send the XML, it works very good now.
So it was NOT a setting.

Gregor
Re: Pause while rotary axis moves
« Reply #5 on: December 09, 2014, 05:46:12 AM »
Meant to write:
I replaced the mach3.exe with the one from version 3.43.027.