My cnc has a problem with the "z" axis. When I try to page up or page down to move the spindle, I hear a "brrr" sound and the spindle makes a shaking movement but moves up or down a minute amount.
I am using Mach 3 and previously had all axises moving the correct amount and speed. I went to config and motor tuning and the numbers seemed to be ok. I tried lowering them some on velocity and acceleration but this did not improve the problem. When the power is off, one can use the knob on the stepper motor and move the spindle up and down. I looked at the connect between the stepper motor and the ball screw and it seems to be ok and also, this connector does not turn when you hit page up or page down. Just vibrates a little.
Does anyone have any suggestions? A friend did tell me possibly there is a short on the wires going to the stepper.
I am using Mach 3 and previously had all axises moving the correct amount and speed. I went to config and motor tuning and the numbers seemed to be ok. I tried lowering them some on velocity and acceleration but this did not improve the problem. When the power is off, one can use the knob on the stepper motor and move the spindle up and down. I looked at the connect between the stepper motor and the ball screw and it seems to be ok and also, this connector does not turn when you hit page up or page down. Just vibrates a little.
Does anyone have any suggestions? A friend did tell me possibly there is a short on the wires going to the stepper.