I purchased a new 4x8 Saturn over the summer. I had a 4x4 which is in the background of the attached video.

I am unable to get the Y-axis to operate smoothly of the new machine, which can be seen in the video.

So far I have:


  • Re-aligned the linear rails.
  • Shimmed the linear rails to reduce a crown in the frame.
  • Put on two new stepper motors (y-axis) and new belts


The gantry now moves free by hand, but still binds when driven by motors.

Any help on what be may be causing this binding would be greatly appreciated.

Thanks,
Lance