So after a couple years of dealing with intermittent and tight bearings on my Y axis, it seems like the Y stepper motor is giving out. (Autoroute 4)
I noticed years ago that as the gantry reaches the top of the range on the Y axis the bearings get tight and the gantry is a little harder to move. If the rails have any dust on them, the bearings trip and cause the Y stepper to jerk and slip, destroying the work. I had made felt guards to help keep dust off the rails and it's helped a bit.
Today I went in to use the machine (first time in months) and the Y stepper was slipping really bad. I spent the entire day taking the machine apart, cleaning the bearings, and so forth and the problem only got worse. As the stepper was disconnected from the spindle and the controller sending a signal for it to move, it was stuck. I tapped the side of the motor and it suddenly kicked on. I can only conclude that in fact the stepper motor is internally faulty. I'm not sure if it's been faulty all these years but I suspect it has been faulty for a at least a year.
Anyone else have this problem? Also what's the warranty on these machines?
Last Edit: Dec 30, 2017 0:02:34 GMT -5 by techtonix
I also have a CNC Shark which had defective motors. NWA was kind enough to replace all three of them at no charge, even when it was out of warranty. I'm thinking they had a bad batch of motors during the time mine was assembled. You might want to contact Axiom about your problem.