I'm having some trouble getting homing working correctly on my new (first) machine. I've got Z working, homing to the top of the column. Also have Y working, homing to the -- end of the gantry.
X and A, however, are giving me fits. I've got the homing in the proper direction (toward the -- end of the X-axis rails), but they don't stop and reverse direction when they hit the limit switches.
My understanding is that they are supposed to independently home each side, in order to square the gantry each time the unit homes. The gantry is currently out of square about 3/8" over its 42" length, mainly due to operator error (I inadvertently switched off the "reverse direction" toggle on the A-axis before a jog and then made a really awful noise when I tried to jog).
So I tried to home the X-axis, thinking the homing routine would fix the out-of-square condition; but, as I said, that's not what happened. The A-axis side homed first, and it did reverse and stop, but the X-axis side never homed. It just made the awful racket that results when the pinion spins against the rack but doesn't move.
So, I loosened the X-axis pinion and manually squared it back up, then re-tightened everything. Before I try to home it again, just wondering if anybody has any pointers for this. I think I've done everything right, but that's usually the feeling I get just before I break something or end up in jail...