29 Sep
2011
29 Sep
'11
1:29 p.m.
On Thu, Sep 29, 2011 at 4:16 PM, Dave McGuire <mcguire at neurotica.com> wrote:
?I believe there's an optical shaft encoder on the
spindle motor of the
TU58. ?I'd check to see that the disk (which is paper-thin sheet metal) and
the opto interruptor aren't clogged up with dust bunnies, then test the opto
interruptor itself.
I can't remember the symptoms when it doesn't work, but it's a good
thing to check. If the device was powered on for thousands and
thousands of hours, the IR diode could be a bit dim - I've seen that
with 15+ year old optical interrupters before (and successfully
repaired the gear with a new interrupter).
-ethan