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Author Topic: Jittering Motors when converting from Liberty CNC to Mach3 - Help  (Read 2278 times)

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I am new to this so my terminology might be off so bear with me...

This morning I installed Mach3 on a router setup to replace the Liberty CNC software that we are currently using.  I was able to get the motors moving and tuned as best as I can tell from moving the steps per rev number from the old software to the Mach.  Every thing seemed ok but after maybe 3 or 4 startups of Mach3 the x and y axis would start to "jitter" their way back to home without being told to as if there was some "noise" being picked up.  I checked the driver test file as instructed in the online video and it said there was an "excellent" response and the graph of interrupts looked like the one in the video.  So I closed Mach and opened up Liberty CNC and as soon as the program opened the same thing happened.  I restarted a few times and the problem remained when starting both programs.  I then uninstalled Mach and the problem still remained.  So I then restored XP to yesterday and that stopped the jittering motor that would walk on their own. 

Does anyone have any ideas?  Should I have tried special driver.bat?  Please advise.

Offline Hood

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Re: Jittering Motors when converting from Liberty CNC to Mach3 - Help
« Reply #1 on: October 29, 2009, 03:55:03 AM »
Maybe there is a conflict between both programmes. I dont know what or how Liberty CNC is ir works, does it use a PCI card?

Hood
Re: Jittering Motors when converting from Liberty CNC to Mach3 - Help
« Reply #2 on: October 29, 2009, 04:29:06 AM »
Which CNC program did you install after you had restored XP?
Re: Jittering Motors when converting from Liberty CNC to Mach3 - Help
« Reply #3 on: October 29, 2009, 01:29:04 PM »
I am not 100% sure but I think it just uses the printer port.  I didn't know there was a PCI card for CNC ops but that makes sense.

Liberty has been installed since day one on this dedicated machine.  I did system restore to a point the day before the installation of Mach.

Any ideas?