Topic: Z stepper motor spat the dummy!
OK. This is strange. I'm using Repetier host to control my (ramps with marlin) printer which I'm busy setting up. Today, whilst trying to set the z offset, my Z stepper started acting weird. It was OK before today. Using Repetier, I was jogging the Z axis. The options are 10, 1 and 0.1 mm increments. For no reason, it started making a loud whining noise when I tried moving it 10 mm. The motor is showing tiny shuddering motion back and forth but that's it. The 1mm and 0.1mm work fine. Its just the 10mm increment that's doing this. Loud whining noise and motor shuddering but gantry not moving. I've tried swapping the driver over but it does the same thing. What gives? Is it likely that my stepper motor just needs replacing??