Rotary Encoder

[davef21370]

I'm planning to use a Namiki 22CL-3501PG geared motor with encoder for a camera star tracker. The encoder has a 4 way ribbon cable with no connector and no obvious way of telling what's what. The only schematic I can find is this...

22CL-3501PG_encoder.PNG (9.19 KiB) Viewed 2833 times

...which doesn't help much.
I'm assuming I can meter out the wires to tell what goes where but what am I looking for ?
Any help greatly appreciated.

Dave.

[joan]

The schematic gives the pinout. Pin 1 of the ribbon cable should be marked, perhaps with a coloured stripe.

[davef21370]

Thanks Joan, no coloured wire unfortunately but can I assume, with pins 1 & 4 being Vcc and GND, if I meter these out I'll only get continuity one way through the LED's or is there more to it ?

Dave.

[joan]

Thanks Joan, no coloured wire unfortunately but can I assume, with pins 1 & 4 being Vcc and GND, if I meter these out I'll only get continuity one way through the LED's or is there more to it ?

Dave.

Don't know. If you post a photo of the accessible end of the ribbon cable someone might be able to identify pin 1.

[davef21370]

Thanks again Joan, gonna try metering it first, would need to get camera set up properly to take any worthwhile pictures. If I don't get anywhere I'll take that route. If I do suss it out I'll post results, this is a handy little motor, readily available, and the project will probably interest others, fingers crossed.

Regards.
Dave.

[davef21370]

Okay, I took the encoder off the motor and one of the outer wires is marked 1 on the board. Should I assume this is Ground and the other outer wire is Vcc and the inner two are channels 1&2?

DSC_0130.png (57.71 KiB) Viewed 2671 times

For £6 I may as well take a chance eh?

Dave.

[rpdom]

I'd look at Q1 and Q2 to see if there are any part numbers on them. Then I'd search for datasheets for those parts and see what the pin connections are and trace those to the wires.

Don't assume anything from the pin numbering.

One wire will be ground, one will be power for the LED side of the two sensors, the other two will be the outputs from the sensors, which will be from a photodiode/phototransistor either connecting to the supply voltage, or the ground wire.

[kb1gtt]

One side of the goal post is an LED, the other side of the goal post is a photo receiver. You can identify the LED(s) with a multi meters diode checker setting. Then you'll know pin 1 and pin 4. After that it would be a 50/50 about which pin is for which sensor. See below picture to show how those goal posts work.

s2012928205920882.jpg (9.6 KiB) Viewed 2564 times

In that circuit, you'll find the PCB ties the pin 2 and pin 4 together. Such that you have one ground. It should be something like the below sketch.

IMAG1098_2.jpg (31.92 KiB) Viewed 2564 times

Do you have a schematic for the motor windings? Can you take some ohm readings between the motor leads? I'm considering using this same motor for a project. I'm wondering if you have gotten the motor to spin. It appears it's not a DC motor, so it's a bit harder to get it to spin than a normal DC motor.

[Mike.pi]

In case you still need info, I found this when wiring mine.

http://www.tsa.fr/Catalogue%20micro-mot ... %20TSA.pdf

[robertberlin]

Hello,

this is what I found out:

I assume:

DSC_0130.png (25.3 KiB) Viewed 2346 times

Photo switch is "KRA011" where the two diodes are connected in series.

Could someone confirm following layout:

DSC_0130_layout.png (4.93 KiB) Viewed 2346 times

Best regards

[robertberlin]

The only schematic I can find is this...

22CL-3501PG_encoder.PNG

...which doesn't help much.

I think the two channels should be pulled up directly from the 5V. Behind the 120R you only get 2.4V. Pins 1&4 seem to be swapped in your schematic. Regards