Updated the drawing I submitted that was put on the Wiki site.
Updated drawing includes grounding of shields for limit switches, grounding of spindle and VFD, energy dump circuit, removed erroneous grounds to chassis I wired originally and includes a forth axis to use either a Stepper motor or Servo motor. All has been tested except the servo motor circuit for a forth axis, I have not built the 4th axis yet and have not decided if I will use a stepper or servo, I am leaning towards a servo for the higher torque at higher speeds.
I hope the intermittent G code error is now fixed with removing the erroneous chassis grounds I wired.
Please remove my original drawing from the Wiki site and if you want post the new one.
Joe