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Topic: Encoders Pinout (Read 871 times) previous topic - next topic



We bought the motor with encoder like that:


But we not able to see which wires are 5V, GND, sensor A and Sensor B for the encoder. Is there anybody here that know this motor?


looking at pictures on sites selling this motor and encoder, the encoder opto devices have part numbers on them.
This should give you some help with reverse engineering a circuit diagram as it is only two opto-interrupters and some PCB tracks.
If you can give us a  good clear set of close up macro pictures of the small PCB and the optos we might be able to help.
It seems everybody want to sell them, new or second hand but no one wants to provide any data.

Tom.... :)

Everything runs on smoke, let the smoke out, it stops running....



I got same issue but with a HP scanner motor.
I used a multimeter to get the pin-out in diode mode. Soon I got the emitter pins ( was the easy one, as a diode, with multimeter you can find the anode and cathode pin), I was able to get the encoder pins. A and B.

Some one managed with code,:


As a quadrature encoder try here to:



Mar 04, 2015, 02:28 pm Last Edit: Mar 04, 2015, 02:29 pm by MarkT
Yes, you can probably work it out this way, the PCB traces are accessible and
the opto interrupter probably consists of a dual emitter and dual detector, so
the wiring ought to give the game away.

There are other, better, images of that part number findable via Google, BTW
[ I will NOT respond to personal messages, I WILL delete them, use the forum please ]


If the pics not clear I will take a picture again with another camera..
I tried to follow after the line but it didn't work yet.


Mar 09, 2015, 03:59 pm Last Edit: Mar 09, 2015, 04:02 pm by arssant

It's for sure a 2x encoder optical, to create a quadrature encoder, as MarkT suspected.

Now the pin out:

 I'm pretty sure ( not 100% positive ) pin 5,6,7,8 are the emitter, 2 led are connected in series. Pin 6,7 are GND and 5v, can't say witch one is. ( test with multimeter)
Pin 6 is common with the detector, In my HP was the +5v.
My concern is the detector, pin 1-4, and pin 4, can't see the line on PCB.
So with multimeter in diode mode, you can detect the anode and cathode of the emitter.
For the detector... cant say much more.



I know, long time, but try here:


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