Hi,

I'm having real difficulty identifying an issue with my X axis linear motion.

Af first glance, it would appear to be a mechanical issue; however, I've run out of things to test. The fault occurs at a similar place on the ball screw every time, between the blue marks shown on the gantry in the video.

Take a look at this video and see what you think.

https://youtu.be/3D3ZwPQShzo

The machine has run fine for the last 3 years. I've tried removing the stepper motor, and it operates fine, not under load, independent of the other mechanical items. With the stepper motor removed, I've tried pushing the X axis gantry back and forth, and it runs absolutely fine. No binding. Then I thought it had something to do with the feedback from the stepper motor? But clutching at straws.

This issue has got me stumped, so any suggestions would be greatly appreciated.

Thanks,
Oliver