Xxl cutting slightly off moving across the x axis

[rsmedley (Randall Smedley)]

Lately I’ve been having issues with using the advanced vcarve feature and also designs that have my cutter running back across the same line. If I use the advance vcarve feature and pocket it out first before switching to a vbit, the vbit will not cut in the proper spot as the cutter moves across the x axis. If my design runs multiple times over the same line it will be slightly off if the original cut had the router moving left to right across the x axis and then if it runs right to left when it goes back over the line. I’ve been trying to diagnose what’s causing this but i have been unsuccessful in correcting the issue

[Julien]

Hi @rsmedley

This can typically happen if one of your pulley setscrews are loose or not positioned properly (with one of the two setscrews aligned with the stepper motor shaft’s flat)

Check out this picture:

https://docs.carbide3d.com/shapeoko-faq/shapeoko-3-how-to-check-the-pulley-set-screws/

If your cut has horizontal lines from successive passes shifted along the Y axis, check the Y axis motor pulley set screws (both of them)

if your cut has vertical lines from successive passes shifted along the X axis, check the X axis motor pulley set screw.

[dandangerous (Dan Dornback)]

Replaced my set screws with a better option - no problems since:

Pulley set screws - XXL

After dealing with the Y1 pulley set screws backing out numerous times on my XXL and messing up jobs, finally decided to implement regular socket head screws - covered here and other places, but a couple points to add for others with the same problem. The socket head screw size you need is M3 x 8mm, you can get a multi-size box from Amazon for $6 that will be more than enough. You want to use “purple” thread locker, it’s low strength and made for set screws. Several brands out there for ab…