When ever I turn turn on my VFD Spindle it causes my stepper motors to jump around so here are the details.
1) CNC router is running at home with 220v dryer outlet for my VFD and 110v for my computer and stepper controller.
2) Only happens when the computer is turned on with stepper controller.
3) Jumping is most pronounced upon initial starting of spindle and seconds before stopping.
4) Trying other outlets and circuits in the basement has the same result.
5) The 220v and 110v circuits all terminate in same electrical panel.
6) I am using shielded cable specifically designed for VFD's and shielded cable for all steppers.
7) Power supply is made from a transformer and capacitor stuff in a separate enclosure.
8) Only + and - leads have been brought form PS to Stepper controller box.
9) Trying another stepper controller that I have which is identical with the exception of using a switching power supply was not affected by the VFD/spindle.
Could my problem be grounding my power supply or stepper enclosure? All other components like, fan, BOB, stepper drivers, 24v and 12v convertors all only take the + and - leads and not the gnd.
How my VFD is wired can be seen here:
http://www.cnczone.com/forums/router...r_spindle.html
Any help would be appreciated.