5 Sep
2011
5 Sep
'11
3:36 p.m.
On 9/5/11 1:17 PM, "Tony Duell" <ard at p850ug1.demon.co.uk> wrote:
snip
The model II used full height 8 inch drives, I'm pretty sure that they were
AC powered (*motor*) the stepper was powered by 12 or 24 vdc IIRC
Popping it
open, the unit powers on and the drive head is dropped to the
spinning disk, then lifted, then dropped, then lifted, and the error
occurs. I cannot see if the head is close enough to the disk or not
(and I have *no* idea of the tolerances anyway) and am not sure how I'd
adjust it -- or drive speed, etc. if that's an issue.
Most 8" drives used AC motors, the speed is set by the frequency of the
power line, and is therefore not something that will drift. A few 8"
drives had electronically-controlled DC motors (ofteh running from a 24V
supply), which can need adjustment. It should be fairly obvious which
yours is.
In any case, don't adjust anything until you have a clear idea what the
problem is!.