Go Down

Topic: Help identifying some salvaged motors, wiring, voltage, etc ? (Read 935 times) previous topic - next topic

digimate

Apr 12, 2013, 03:41 am Last Edit: Apr 15, 2013, 08:38 am by digimate Reason: 1
I would appreciate an help you may be able to give me on making use of these bits and pieces, particularly wiring and voltage identification.

From an old 5.25" floppy drive...

1. Minebea Co.Ltd Stepper motor (head positioning) 17PS-C006-01, 5 wires white/brown/red/black/green
2. Beuhler DC motor (main drive), 2 wires from top blue/red, 2 wires from bottom (near the pulley) green/yellow
3. Solenoid (head clamp) (made in mexico) 371-30, wiring is easy - just 2 metal tags, but what voltage?

From a CDROM drive...

1. Small unbranded stepper with worm drive from laser positioning in CD rom drive (04X17R290), wiring is flex. cct strip, 4 conductors

from junk box...

1. Small unbranded DC motor   VD 030Y22

semicolo

The parts coming from the floppy are likely to use 12V or 5V, minus the driver drop.
The way I guesstimate the voltage of unknown steppers is apply a voltage to 2 windings out of the 4 available and wait for the temperature rise. Then I slowly increase voltage until the temperature stabilizes around 70C (some steppers can take more but without a datasheet it's best to keep a safety margin).
You can probably use this technique for the solenoid/dc motor, maybe with lower temperature rise.

digimate


The parts coming from the floppy are likely to use 12V or 5V, minus the driver drop.


So they don't usually regulate the 12V down to something lower?  OK, good.


The way I guesstimate the voltage of unknown steppers is apply a voltage to 2 windings out of the 4 available and wait for the temperature rise. Then I slowly increase voltage until the temperature stabilizes around 70C (some steppers can take more but without a datasheet it's best to keep a safety margin).
You can probably use this technique for the solenoid/dc motor, maybe with lower temperature rise.


Good idea to test via temperature, thanks. I am confused about the stepper, I thought they had 2 windings, not 4 - also the big one has 5 wires to add to the confusion.

MarkT

Unipolar steppers have 4 windings, bipolar have two.
[ I won't respond to messages, use the forum please ]

digimate

Managed to find a page that details the typical stepper found in old 5.25" drives here http://homepage.cs.uiowa.edu/~jones/step/example.html  -  It even has the wiring colour codes and typical current.

That's one of them sorted :)

Go Up