Originally Posted by
pparrett
After some testing on mydon't think you'll get much improvement by upgrading the Y-Axis on the 6040. The fully supported rails on the Y-Axis, in combination with there being 4 linear bearings (SBR16U), makes for a decently rigid base.
I've tried flexing the Y-Axis moment and I don't see any deflection (push on one side of the gantry and pull on the other).
How much do you see on yours? Have you checked the SBR16U's are adjusted correctly? There's a small set screw on the side to set pre-load.
I'd focus on rebuilding the X and Z. Those are unsupported rails and flex significantly.