Slowing doen the motor speed worked fined for a while. Now I have the same problem again. My guess is that it is caused by vibrations and slowing the motor just shifted the frequency a bit. Now I made an interesting discovery. First i tightened the gib just to the point the force over came the weight of the spindle and motor. Then you could see the backlash was huge. Then I removed the gib and I still have binding and stepper screaming on the upward move. Maybe if I adjust out the backlash the gib adjustment will not be so sensitive?
Andy |