27 Feb
2014
27 Feb
'14
3:39 a.m.
What I would do is
disable the servo (red swtich on th amplifier PCB on top of the PSU), put
a folded imwipe between the heads and disable interlocks so the drive wil
lrun without a disk instaleld. Then move the carriage frowards by hand
wit hthe thing effectively spun up (the Kimwipe wil lavoid damaging the
heads) and look at the signals i nthe positioner servo circuit with a
'scope. Start wit hthe outputs of the transducer, see if all signals are
present and change as you move the carriage.
I do it the same way - but with a spinning disk in the drive. It comes
out the same...
Ph