Quote Originally Posted by silyavski View Post
The led of the switch is a big help.
Honestly I can't be happier that I made my gantry to square via Mach3. When I moved it by hand I was doubtful that is needed. But once it moved 100m then the Hiwin loosened a bit and I see the benefit of squaring with a push of a button.
Yes and if using slaved motors it's also having the piece of mind that things are correct and dropped or missed steps are not building up.
Like I said before even thou gantrys are built and look strong and they will drive just from one side when pushed etc you will always get some racking to some degree or another. When one motor stops while other keeps moving then the mechanical advantage of the ballscrew even with relatively small steppers attached will twist even very strong gantry's like Boyan's(Silyavski) if this happens you have no way to know unless referenced with marks or switches.!