My issue is this: When my vfd is on and spindle is running, and I click reset in Mach3, the X and Y axis (possible Z as well) lurch or jerk as much as a few inches. This makes my settings in Mach3 no longer zero, and I need to reset the zero point to resume cutting. The lurching happens only when I disengage, not when I engage the controller. That is, when the controller is on, and I can move the gantry/axis, and then click reset to disengage the controller, this is when the lurching happens. It doesn't happen when I engage the controller.
It also doesn't happen when the VFD is on, but the spindle is not running. Its only when the spindle is running and I click reset in Mach. Hope this makes some sense.
I just completed checking grounds- all components are grounded to the same point, and I verified that I get continuity from each component to the central ground point. My grounded components include:
- VFD drive
- Spindle
- Z Axis, Gantry, and table
- Computer
- Ascension 1000 controller with Gecko202 s
- Battery backup unit (computer and controller are plugged into this)
All show continuity with the common ground point.
The electric circuits are on separate breakers- the VFD uses 220, and is on a different breaker than the computer and controller, which use 110v.
I expected a ground issue- but that doesn't seem to be it. What else can cause the sort of lurching on disengagement? Its not just a little bit- its at least two inches on x axis and y.
Thanks for any clues here. Its hard to reset when I have any cutting issues when disengaging the controller causes a full loss of zero reference.
Wayne from White Salmon