Weird jumps along the x axis

CrossFire ® Troubleshooting
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20190708_105533
20190708_105533809×1000 172 KB
Hey guys, just started using my crossfire and have been dialing in on presets for the materials I use for a while and I have noticed that at random times, the x axis will just shift forward. It wasn’t that noticeable at first because I was making rectangular pieces for the most part but the issue is pretty clear along diagonals. As far as I know, the gcode should be fine but even on dry runs, I can see the x axis stutter. Any help on this issue would be greatly appreciated.

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Looks to me like loose motor coupler set screws. Tighten them down hard and see if it improves.

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Hey Daniel, thanks for the quick response. The coupler was a touch loose but even after tightening down on it, the issue persists. Maybe it’s an issue with the motor?

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I’ve figured out my issue, it wasn’t the x axis jumping but rather the y axis slipping, seems that one was loose too

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I had some trouble keeping mine from slipping, @jamesdhatch suggested that I feel the screw fall into a slot /thread and the tighten the hell out of it, it ended a bit of frustration. I did Locktight it as well but maybe not needed.

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Topic is old I know, but be sure to do this. I was getting some very strange jumping on cuts and couldn’t figure it out at first but this was my issue as well. Homed it back to where the project was supposed to be starting and found that it was off by a good 3 inches positive X axis. What threw me off was it acted fine when tramming in 300, 200 and 100 IPM, but at 50 IPM it was very apparent and jumped once per revolution. Coupler didn’t take too much more torque but it must have been enough to make a difference. Glad to have this forum.

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