Inverter noise problem Help !!!

[AxlRose]

Biggest problem: Microkinetics.

These are some of the worst people to deal with, avoid it at all costs. Nothing but a run around to be honest.

[murphy625]

This has been a great thread to read.

I put a VFD in my box also. It caused so many problems I opted for a reversing contactor. (I can do without the speed control if I must to get it running)

My ICM2900 has no chasis ground on it.. should I make one???

Murphy

[Al_The_Man]

The ICM2900 has several terminals marked GND these go back to the PC power supply common, It is best if there as few actually grounded points as possible, if a ground conductor or shield is grounded at more that one point, it is possible that ground loops can be set up and cause problems. In other words, try and make connections on ground conductors at one point only (common ground plate), if possible.
Also as far as AC Contactors and AC relays are concerned, make sure there is a R/C suppressor across the coil, these can cause alot of havoc generating noise spikes.
Al

[mcmmach]

I am really glad to have found this discussion, I am having the exact same problem with my machine and have been replacing everything trying to fix it.

I just rewired my steppers and the problem got even worse !

After reading this I know I have ground wires going into the cabinet, cables grounded at both ends, VFD frequency set too high, etc.
I will post back after correcting all these problems with the results.

As to the original thread problem, were you able to fix your machine ?

Thanks, Dean

[mbam]

I feel bad for not posting when we finally figured out the problem. It was not electrical at all. This is a series 2 Bridgeport with variable speed head. The bushings in the pulley were worn out, creating vibration. We got rid of the variable pulley system, used 8MM GT2 belt & pulleys. Has not lost a count since. And it is much quieter !!

I agree re: Microkinetics

[mcmmach]

After redoing all my wiring per the suggestions in this thread I am happy to say that my skipping steps problem appears to be history.
I love this web site !
Dean