Could be that your traverse unit is so old the bearings need to be replaced. Thrust requirements are at a maximum at the end of each stroke. Worn bearings could cause the skipping. We’ve had units sent back to us after ten years of 24×7 use, and the bearings hardly look worn. Other times we see a unit that’s been in service for only a few years and the bearings are completely worn. This can mean the traverse unit size is not properly matched to the application requirements. Not only the diameter and line tension of the material you are winding, but also the physical set up of your winding assembly, go into determining the exact size of the Uhing traverse drive nut needed. For example, if angle “M” in the illustration below is too great, it can cause a drive that’s too small to skip or even stall. The best solution to your problem is to phone an Amacoil applications engineer and go over the specifics of your set-up. The next best solution is to go to and complete the winding assembly applications form. After you submit the form online, an Amacoil applications engineer will get back to you to discuss what might be causing your Uhing traverse unit to skip.