Re: [CAD_CAM_EDM_DRO] Stepper sings, but wont walk....

At 06:41 AM 4/7/02 +0000, you wrote:

>> I have been trying to repair a Bridgeport Boss that has a stepper
>> which when told to move via the stock control "sings" and will sort
>> of vibrate but wont actually turn.

I had exactly this problem with a Boss5 once, when I managed to get the Z
axis going both ways at once. We found a bad phase trans. They are famous
for this! It's an archaic one, but the big boss had a friend who is amazing
on this stuff. He had it in my hand by end of day and next morning I had it
in place. End of story.

Regards, Hoyt

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