2 Mar
2011
2 Mar
'11
10:52 a.m.
IIRC the tandon TM-848-2 drives use 24VDC motors... I always liked them
better than the shugart drives.
I did say 'Most' 8" drives have AC mains motors, not 'all' :-).
24V DC motors with some kind of electrronic speed control was an option
on some other drives too. I have a pair of drives made by a company
called 'Elcomatic' nad according to the service manual, a 24V DC motor
was an option on those. Mine have 240V 50Hz motors though.
One other nice featuroe of these drives is a slotted optoswtich near the
head carrarriage that changes state at cylinder 43. This is used (I think
it's a jumper-selected option) to reduce the write current, so you don't
need to provide the TG43 signal from the controller. Very handy if you're
using them with a PC/AT controller ;-)
-tony