It might have a shorted direction switch, causing a dead-short on the
incoming power. It might have a shorted winding. In that case, you're
I've got a $300 Chinese cheapy as the knee drive on my R2E4, and it's
been in service for - what? - over ten years(?) on two different
At least there is a repair service center in town. I got this 25 years
ago an it's been on two mills too! We've been using it full speed to do
some minor production wood planing lately...that's a sin!
As one ages, one wishes for a knee drive! And, a power draw bar!
Tom, I'm looking at a schematic for an Align brand power feed, that
I'm guessing is an exact copy of the Servo brand (which I too have on
my Wells-Index mill but no schematic included in the documentation).
At any rate if any electronic component failed short, the drive would
be running full speed. And only the shorting failure of the stator or
rotor windings could cause this sort of problem. My guess is that
some other wire has come loose, and is shorting to ground. Check the
table feed limit switch harness, as the power goes through these right
after the circuit breaker and power on indicator light.
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