"Chuck Taylor" wrote in message
news

One of my recent "new" machines (acquired at the same time as the
Unisaw that was the subject of another thread several days ago, and
which made the trip home just fine, thankyouverymuch) is an
Invicta/Delta 22-650 (aka Rockwell RC-33) planer. 220V, 2HP, single
phase motor.

While making space for these machines and setting them up, I turned on
the planer for a few seconds, then flipped the switch to OFF. The
planer kept running. It took a few more flips of the switch before
the planer stopped. I repeated the process and had the same
experience. It didn't do this when I tried it out at its old
location, of course.

With the power disconnected I checked the switch terminals for
continuity. So far I haven't been able to duplicate the problem--that
is, to get continuity with the switch in the OFF position. (It's a
double-pole switch, and both pairs of terminals behave like they ought
to when probed with a meter.) Nothing looks or smells out of sorts
with the switch.

Unless someone suggests another possiblity, I'm going to assume that
the switch is faulty in some way that doesn't show up at low
voltage/current, and that it simply needs replacing. Anything else I
ought to check first?


--

Food for thought . . I didn't follow the thread about the Unisaw, but sounds
like they are new to you, while still fairly aged. Try this test; turn the
planer on, then unplug it. Now do your continuity check and see if it opens
when you turn it off. I suspect switch arcing & welding the contacts shut,
which wouldn't show up in a test with no power at all. Just my $.25. Either
way, as others suggest, a new switch isn't that much.

--
Nahmie
The only road to success is always under construction.