Motor driver Help! Guess I'm not making Xmas gifts. :(

So. I have an XL that was upgraded from a regular, and have been using it regularly for a couple of months. I haven’t used it these past couple of weeks though. Went to fire it up to make some gifts, and behold a big problem. Started to jog the gantry and then the RY made a horrible noise as it was moving. Almost like a grinding noise, and it seemed to lag behind the LY. After checking and finding no obstructions, I took off the belt. Still made the noise just free spinning, and I could stop the motor shaft from moving with just my fingers. I thought, something must be wrong with the motor. But then after swapping the Y motor plugs on the board, the LY motor then did it. So. It isn’t the motors. Is it the RY motor driver having a problem? I have a 2.2 version board and haven’t made any changes since using it last. I use Universal Gcode sender 1.0.9. I then tried the 2.0 UGS and same thing. Any help would be greatly appreciated. Guess that what I get for waiting till the last minute to make gifts. Thanks guys! Jere

Please verify which of the parts which could be bad is bad by swapping parts:

First, slacken the belts and disable homing (assuming you’re using CM3) and test to see which side works and which doesn’t.

first power down, then connect the motor which you know to be good using a wiring extension which may be bad to a motor which you know to be good — repeat that process for each part which might be bad — once you’ve identified the part(s) which are bad, contact support@carbide3d.com and we’ll work out how to get them to you.

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I second what Will said. I just had a similar issue with my XL. My issue with with the YL side. After replacing the controller board, the belts and the motor, the issue turned out to be the wiring extension between the board and the motor. Once I replaced that, everything has been fine.

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Hey Will! Okay, I believe I did. I use UGS and only have limit switches, no homing. I plugged the working LY extension line and motor into the RY port on the control board and same thing happened to th LY motor. So then I did the opposite, I plugged the “problem” RY motor and extension into the LY port on the control board, and it came back to life like nothing was wrong. That tells me that both Y motors and extension lines work fine, and would be a control board issue. I’ll do it one more time with all the motors I think, just to triple check. Thanks guys!

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