Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: Bush Flyer on June 21, 2024, 11:05:52 AM
-
I recently downsized my CNC router and relocated the controller underneath the router table to save space. However, I encountered a problem after the rebuild. When I have MACH 3 displayed on the computer screen and start the spindle, the screen goes blank. If I start the CNC running and then start the spindle at the inverter controller, the screen flashes. I have already disconnected Mach 3 from the spindle and inverter, but the issue persists. All my cables are shielded and grounded at one end, and I am using an old Windows XP computer. The spindle is water-cooled and controlled with a 2.2KW VFD Inverter. Could this be due to interference, and if so, how can I fix it?
-
Make sure your AC earth and DC ground are NOT on the same bus.
Does your screen remain illuminated but blank or does it go black?
-
Thanks For replying Oliver, My screen will go black all together, I did try an external earth between the VFD Inverter and the CNC which did not help, I will now to back to check the earths. There is a possibility I have done this "mixed the DC and AC earths" with me trying to make the wiring as clean as possible, I should get back to it this coming weekend, My thanks again, and I will let you know how I get on.
-
Noise can also be coupled through the AC supply wiring. In addition to noise, a motor start up can cause a momentary voltage drop. Separate feeds from the breaker/fuse box might help. Experiment by using an extension lead to connect the control electronics to an outlet on a different circuit breaker.