I recently looked at a used lathe that I'm considering purchasing. It's a Mori DL with opposed spindles. The C axis for the right spindle has a weird vibration to it. The left side spindle is fine. It's most noticeable when jogging the axis at a low rpm. It feels jerky, but at a high frequency that has me sure that the problem is electronic. As I jog it, the vibration varies in intensity. Once I stop jogging, the vibration usually diminishes for a few seconds until it goes away. Once I was able to stop at a position where it didn't go away. It just sat there humming away. In spindle turning mode, it is quiet and feels smooth.
I'm looking for any ideas on what this could be. Bad drive? Motor issues? Parameters need changing? Could it be just that the gain needs to be adjusted? I believe the motor is integral to the spindle and that there is no separate C axis drive motor that engages when going into milling mode.
Thanks in advance for your responses.
I'm looking for any ideas on what this could be. Bad drive? Motor issues? Parameters need changing? Could it be just that the gain needs to be adjusted? I believe the motor is integral to the spindle and that there is no separate C axis drive motor that engages when going into milling mode.
Thanks in advance for your responses.