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Wierd Start Stop Motion
« on: August 09, 2009, 11:21:09 PM »
After I installed the latest version of Mach3 I started getting a wierd start stop motion.  It did not do this before.

In motor tuning the motors move smooth as silk.  Likewise I can jog smoothly.  However, if I run a program I get this wierd start/stop motion.  Same if I tell it to go to zero.  It will run for about a second, come to a complete stop and then continue after a half second pause.  Any ideas?  It will haltingly pulse its way through the program otherwise normaly.  Rapids seem about the right speed and feed rate seems right --when it is moving.  I can't figure out why it is coming to a stop.

All 3 axis stop and start at the same time.

PS: I did a "Restore Settings...." which took me all the way back to raw default settings, and I am still getting this weird motion.

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Re: Wierd Start Stop Motion
« Reply #1 on: August 10, 2009, 01:59:26 AM »
Look in your code and see if there is a G61 on the first few lines, if there is replace it with G64. If there was no G61 then put a G64 in on the first line anyway.
See if that helps.
Hood
Re: Wierd Start Stop Motion
« Reply #2 on: August 10, 2009, 02:14:02 PM »
No, unfortunately that did not seem to do anything.  I still have the wierd motion.

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Re: Wierd Start Stop Motion
« Reply #3 on: August 10, 2009, 02:16:50 PM »
Please attach your xml

Hood
Re: Wierd Start Stop Motion
« Reply #4 on: August 10, 2009, 02:29:53 PM »
Where do I find that?  Sorry, big noob.

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Re: Wierd Start Stop Motion
« Reply #5 on: August 10, 2009, 02:34:02 PM »
If you are using Mach3Mill then look for a file called Mach3Mill.xml, you will find it in C:\Mach3 folder. If you have any other profile then it will be the name of that profile.xml.

Another quick question, do the DROs show the movement stopping as well and is it 029 version of Mach you are using?

Hood
Re: Wierd Start Stop Motion
« Reply #6 on: August 10, 2009, 04:56:43 PM »
Found the xml.  Thank you.  I suppose if I had just looked it would have been obvious.  Sorry.

As to version: Version R3.042.029.  In fact, the problem started when I upgraded to this version.

As to the DRO's, they don't update smoothly even when the motion is smooth.  In other words it doesn't scroll where I see, e.g., 3.000 followed by 3.001 followed by 3.002, etc.  It is more like 3.000 followed by 3.148 followed by 3.1786 etc. They seem to update in blocks. Again, this happens even though the motors are moving smoothly.  I don't know if that is normal.

HOWEVER, when it is running g-code it stops at regular intervals and the DRO's show the stops.  For example, if I start from x0y0 and g0 to x10y10 it will travel EXACTLY 2.5328" on both axis, stop, then travel 2.5328" more, stop, etc, until it reaches x10y10.  The DRO's will show: 0.0000, then 2.5328, then 5.0656, then 7.9584, etc.  It does this to both axis in sync.  I can run the g-code back and forth from x0y0 and x10y10 and it will always stop at the same places.

If I move just one axis instead of two at a time, the distance changes (2.5926" at rapids) but will always stop at the same distance.  if I do g1 rather than g0, the distance changes depending on the feed rate.  However, if the feedrate doesn't change the stops will all be at the same distance.

I hope that tells you something, because I am totally stumped.

Thanks,
« Last Edit: August 10, 2009, 04:59:46 PM by rlrhett »

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Re: Wierd Start Stop Motion
« Reply #7 on: August 10, 2009, 05:06:14 PM »
There seem to be a few that are running into problems with ver 029, try going back to your older version.
Hood
Re: Wierd Start Stop Motion
« Reply #8 on: August 19, 2009, 12:26:33 AM »
Unfortunately, changing versions has NOT helped.  I have uninstalled the driver AND the software, deleted the Mach 3 folder and reinstalled R3.02.  No change.

This is very strange.  Jogging moves flawlessly.  I assume when I jog using the virtual pendant I am sending pulses just like if I was running g-code.  I can't imagine what the difference is.  Likewise, when I move the motors in motor tuning mode the are smooth as silk.  However, the moment it tries to run g-code I get these predictable stops.

Is there perhaps someone from Artsoft that may have a suggestion?

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Re: Wierd Start Stop Motion
« Reply #9 on: August 19, 2009, 02:40:11 AM »
Attach your code please, I have looked at your xml and it seems fine with the exception you have Output 1 enabled and set to Port 1 but you have it asigned to Pin 0.


Hood