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Author Topic: Origin drifting along the program running  (Read 76 times)

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Origin drifting along the program running
« on: August 04, 2019, 11:20:41 PM »
Hi
we just installed brand new servo motor kit on a old router we would like to  renew. All axis are turning freely by hand all along the axis displacement. The motor is directly driving a screw by the way of a servor motor coupling. These coupling are tight.

We have configured alll Mach3 parameters to reach good accuracy for all axis. The issue we have currently is drifting of  the origin along the program. It is like the axis are loosing some steps. Example. We have a reference for the zero position on the table of the machine. We are doing the zero of the machine at this position before starting the program. We run a small program doing a facing operation. (100 g-code lines). We run this program in the air (without milling material). Returning the machine at origin position (G00 X0Y0) and we  have an offset of the origin around 3 mm in x and y, It is mostly the same in both both a little bit larger in X. The X and Y screws are the same.

Is someone can have any idea what can cause this drifting of the origin?

Thank you for your help.
Re: Origin drifting along the program running
« Reply #1 on: August 06, 2019, 03:08:35 PM »
Hi,
you are gaining/losing steps. Maybe noise is getting to your servo encoders and making the drive think the servo
is at a different position.

Tells us more about the servo and servo drive.

Craig
My wife left with my best friend...
     and I miss him!