66Views4Replies

Author Options:

what would this stepper controller pinout mean? Answered

I salvaged the interesting bits from two gravity fed laserprinters recently, and was delighted to find the stepper motors have small driver boards mounted to them.  Unfortunately, i dont know much about steppers or their drivers.  I'm hoping somebody with more familiarity can point me in the right direction to figuring these out.

They are 13.9W 24V steppers, and manually rotating them i can feel 24 jumps, so im guessing they rotate 24 steps per revolution.

The pins on the driver are LD, CW, START, GND, DC24V.  Aare those common pins for a stepper driver?

Comments

The forums are retiring in 2021 and are now closed for new topics and comments.
0
Kyle_S
Kyle_S

9 years ago

OK, so no thermal paste, but ident is there!

LB1928 1LK0

0
steveastrouk
steveastrouk

9 years ago

Dunno. What chips are on the board ?

0
Kyle_S
Kyle_S

Reply 9 years ago

The only IC I see is kept icy, by a heat-sink.

The heat-sink is held on by two captive screws that are held between the IC and the board, with small holes on the underside of the board to remove them.

I'd provide a picture by my phone decided to corrupt the file (you don't get 16GB SD cards for under $20 without taking that sort of risk).

If I take off the heat-sink, would it be reasonable to expect there's a blob of thermal paste under it? Would an IC like this (one designed to hold captive screws) be labeled on top?

0
steveastrouk
steveastrouk

Reply 9 years ago

Yes, and the ident is likely to be under it.