24 Nov
2008
24 Nov
'08
9:21 a.m.
On 24 Nov 2008 at 10:26, ROBO5.8 wrote:
I scoped out the index pulse to verify and it was
running about 1.2x faster
than it should (420 rpm versus the expected 360 rpm).
Is there anything I can do to get this drive operational other than to sell
it another who has a 230v/50 cycle environment.
I have a Qume 842 8" drive with a 50 Hz motor that I modified to work
on 60 Hz. I replaced the motor pulley with one that was slightly
smaller and the drive has worked fine for the last 20 years or so.
Where to find an appropriate pulley might be an issue if you don't
have machining facilities. In my case, it was dumb luck--I found
what I needed in one of Halted's hellboxes. It wasn't a smooth,
crowned pulley like the original, but rather a flanged timing belt
model. It was close enough that it worked (and is still working)--
the small teeth in the pulley surface didn't seem to transmit any
"noise" to the spindle, probably because of the large mass of the
spindle pulley.
You might want to have a look at http://www.smallparts.com if you
don't want to "roll your own".
Cheers,
Chuck