Hi all,
I recently took apart a non-functional inkjet printer (Canon Maxify MB2320) and was left with some cool components. One of them was this integrated motor/encoder assembly:
The motor seems like a simple brushed DC, but the encoder has given me some trouble. I talked with an electrical engineer friend and this is what we've figured out so far:
I have all the wires to connect this assembly to the main control board, the PSU, and wall power. However, I have not been able to power on the main control board to allow me to probe the connections for useful information. My questions for you are:
Thanks so much,
Eric
I recently took apart a non-functional inkjet printer (Canon Maxify MB2320) and was left with some cool components. One of them was this integrated motor/encoder assembly:
The motor seems like a simple brushed DC, but the encoder has given me some trouble. I talked with an electrical engineer friend and this is what we've figured out so far:
- The I/O for the assembly goes over a 7-conductor ribbon cable
- Two of these conductors should be for motor power
- The surface-mount sensor unit has six pins and is broken up into two sections. Most likely: a 2-pin row for the LED and a 4-pin row for the detector(s)
- While the sensor unit does not have a common ground between LED and detector(s), their common ground is established by the PCB so that the 7-conductor ribbon cable is sufficient
- This leaves 3 other detector pins. We think the most likely configuration is for there to be two detectors to allow direction sensing (if this is obvious I apologize).
- That would mean the last three pins are common high voltage and signal 1 and 2.
I have all the wires to connect this assembly to the main control board, the PSU, and wall power. However, I have not been able to power on the main control board to allow me to probe the connections for useful information. My questions for you are:
- Is there something about the above reasoning that is flawed?
- Would you expect to have an easy way to jump power on with a control board like this?
- How do I identify what voltage to supply the LED?
- How do I identify which detector pins are which and what their outputs will look like?
- Are there other things you think I should know about trying to use this sort of assembly for my own purposes?
Thanks so much,
Eric