24 Feb
2006
24 Feb
'06
11:04 a.m.
Tony --
After a little digging I found a datasheet for
the NTE replacement for CX065B in PDF format.
If you'd like I can email it to you or print it
out and snail-mail it.
Glen
0/0
Tony Duell wrote:
The Epson motor is very different to the Commodore
one. Commodore used a
permanent magnet DC motor, the Epson drive uses a 4 phase motor with
electronic commutation (there are 2 hall sensors under the PCB). It's
just the speed controller chip that's the same/
Not offhand. The only time I ever really
encountered any serious speed
problems with those motors was when the tach winding opened up, and they'd
That problem I've got. I've taken the motor housing apart, and have tried
to repair the coil. Time will tell...
run at full-speed with no regulation. I do have
the manuals for the 1541 in
the other room, and can take a look...
I have the ofifical Commodore manual, so if that's what you have there's
no need for you to look.
I have had speed control chips fail on a small
number of occasions, but don't
recall whether this was one of the numbers or not. Usually if you're
getting a good waveform off the tach winding and power to the chip, and no
control coming out, that's the problem -- it's been either the motor or the
Sure...
chip in those cases, not much else in there.
See above, the Epson motor is a lot more complicated. There's the chip
and 10 discrete transistors on the PCB.
For interest I'd like to know exactly what the chip does (I am curious
like that...). I'd also like to know just what the 'other' preset on the
Epson board is for (not the one that sets the speed), it seems to balance
the 2 hall sensors or something like that.
What sort of a problem are you having?
Initially an open FG coil, let's hope I can get that right...
-tony