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Great news! When I set up my basement shop I had a dedicated 30A line run to the mill area, and I had the DC motor and the Stepper power supplies plugged into a common switch powered by this line. That way, when I was done working, I flipped one switch and everything powered down.

I had tried plugging the DC motor into a different circuit, and it did little to improve the problem. But, looking at CNCBASHER' s post, I tried another combination, leaving the DC motor on the original circuit, and moving the Stepper power supplies to a different circuit. That seemed to solve the problem. I will continue to test before announcing the gremlins fully beaten.


It is still a mystery to my why I have run with this setup for 5 years without issue, and why it was getting progressively worst just in the last few weeks.


PCW - I was looking around on ebay and there are some nice breakout boards available now for a pretty reasonable price. I might just pick one up for testing. Maybe something on my existing board is on it's way south.

Rick G - I was using the original motherboard's parallel port. Again, maybe I'll pick up a pci card for testing/backup.

Thanks for all your help.

Rick Denoon

Do you have a good solid ground to your panel? Is your neutral bonded to the ground?

John

40 year old house and wiring. I was thinking about running a dedicated ground line from the house ground (water main) and making sure that everything that could be grounded was tied to that ground. Might still be worth doing.

Thanks
Rick

I would consider driving a 10' ground rod next to the panel if possible...

John