Originally Posted by
justCNCit
Thanks guys,
It's really not that bad, it has always been obvious that the whole gantry is going to twist when under a load because of the screw only being on one side. Knowing this I already purchased the 4 axis drive to mount a second stepper on the Y axis when the machine gets rebuilt. The big moving gantry is what I refer to as the Y axis and I may be incorrect.
When its rebuilt it will probably have precision rod rather than cold rolled. However we can see that the machine works now without sinking $$$ into it. I was in a rush to see if the thing would even work. The alignment issue is by far the main issue as the thrust bearings on the screws rub rather than roll so now and then they bind (luckily enough on the last job after cutting was done).
I was not aware you can pick up a straight edge big enough to tune this in.
Does anyone have a picture of one? I figured they were for squaring something to a 90 degree angle, not for aligning two rails.