Square not cut square

I’m completing the build of a used X-Carve donated to our local MakerSpace and having a problem with the cut not being square to itself. If I design a square in Easel it is not square when cut by the X-Carve when measured across from corner to corner. Example I defined a 16 inch square and the diagonals were 3/16 of an inch different.

My belts and eccentric pulleys are tight.

Any suggestions on what to work to resolve this?

Two things:

  • Square the frame
  • Make sure the gantry isnt skewed, many people use bumb stops for each side so when they power the machine up they hold it up against these stops.

This video may help with your problem. Make sure your belts aren’t to tight. Good Luck with your X-Carve.