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Hello,

I'm finalizing the build of my CNC, which is based on the aluminum ox cnc, but my system has started acting up in a very bad way. The system uses a mach3 compatible motor driver board from china through ebay, and I'm using mach3 as my cnc software. I was routing my spoil board when all of a sudden the motors started jerking around and the planing blade was driven diagonally into the spoil board. I reset the board and computer, and frequently it immediately starts spazzing as soon as it was turned back on. Sometimes, the system doesn't spaz immediately, and the y and z axes work just fine. As soon as I begin moving the x axis, all 4 motors (three axes) begin spazzing out and driving in random directions. My initial thought is that the cheap chinese driver board has messed up. My second thought was maybe the parallel port on my PC (running windows XP) has died (I've heard that these die sometimes). Does anyone have any thoughts? Thanks.

For the record, I've probably run this system for at least 2 hours of programmed cut time before this incident occurred.

 

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David
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Welcome to the forum, JW! Assuming your gears and pulleys and belts are tight and nothing is slipping, have you checked for a bad connection? What about electrical interference - are your cables shielded? Can you swap leads for the X and Y motors and see if the problem still exists? Those are places I would start with troubleshooting.

David
 

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Ross
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Welcome to the forum.
 

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"...all 4 motors (three axes) begin spazzing out "

basic troubleshooting practices would point you to look where all motors are in common. I suspect you are thinking right, from the pc to the front end of the controller board. as mentioned, verify everything you can. connections, can you check the power supply voltage(s)? has something changed since it was working correctly? software upgrade maybe?
 
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