[mikburts]

Benny suggested that I ask the forum for help. Need help to identify wiring on PMI encoders. Color of wires and pictures are attached.

Wire color code is

red
black
green
orange
white (black tracer)
white(blue tracer)
white
bare wire from shield

mikburts

[mikburts]

Pictures didn't go through so I will try again.

Mike

[mikburts]

These picture are a learning experience.
Thanks for having patience

Mike

[ynneb]

I suggested the red and black wires would probably be the power supply wires. ( Voltage unknown though, I suspect 5 volts )
I figured if you had the power supply wire connected ok, it would be a matter of trial and error for the signal wires.

But a second and third opinion would be even better than an educated guess.

[Splint]

Perhaps try asking the manufacturer of the encoder, if it's not too old they may have all the info you need, also have a look if there is any identifying lettering where the wiring is soldered to the board.

[mikburts]

Ynneb Splint
I found a servo repair facility that had the wiring config.The servo mfg (PMI) only puts their name on them. The tech rep. had a book with the info.

Thanks
Mike


Red- +5 Volts
Black- Comm
Green-- Index
Orange- Index Not
White (brown tracer)- A Not
White(blue tracer)- B Not
White- Channel A
Blue- Channel B
Bare-- Ground

[Al_The_Man]

Aha you threw us a curve ball, you missed a wire the first time!
If PMI just put their name on them I would guess they are Renco, they look the same.
Al

[mikburts]

Al
thanks for the reply. At 62 the eyes play tricks on you.

Mike

[Al_The_Man]

Mike, I don't know if you have used this encoder type before, but if not a couple of tips on mounting, with the Renco type, after the encoder is slid on the shaft the board c/w reading head is secured first and then the aluminum bushing with the rotary scale is pushed down as far as it can go before securing the allen set screw, you should hold the motor/encoder up so that you can check to see if there is gap both sides of the glass disk and reading head. Make sure there is no endplay on the motor shaft before mounting, if there is it is possible for the disk to move against the head and destroy it.
Also, always mount pulleys, drive gears etc to the outgoing shaft first, as any tapping or driving on of this kind is not good with the encoder in place.
Al

[mikburts]

Al
Many thanks for tips on installation. This time and one more will be two. Good sources of information and sharing it makes this forum strong. Again thanks Al,Benny and Splint for response to my need for info.

Mike

[rutexus]

Mike,

Some encoders draw a lot of current all the time. I encourage people to stick to the US Digital encoders if possible because they use the Agilent (used to be HP) sensors, they draw little current, they have many mounting options, they are reasonably priced, easy to mount, have excellent documentation and support. I am not familiar with the encoders you are asking about. Hopefully you can find support from some of the men who have used them.

Tom Eldredge

[ynneb]

If they are Renco as Al suspects, I have heard of an issue about them drawing too much current and not working with Rutex drivers without a seperate power supply to them. ( I suspect that might be why Rutexus has responded here.) Well I have used 3 of the Renco encoders with the Rutex drives and they are working fine. I did not need a seperate power supply for them.
If however you do get stuck, it is a simple process of connecting a 5 volt power pack to them.

[Al_The_Man]

Benny, I personally have not had a problem with any manufacturers encoders drawing too much current, especially if they are of the differential TTL line-driver type, most I find draw about 100ma (150ma tops), which I would say should be peanuts for any system. You Might run in to a problem if you use single ended open-collector type and use a small value pull-up resistor or the like.
Al

[mikburts]

Al,Benny,Tom

The encoders are a product of Kollmorgen.

Specs.
500 lines per rev
+5 volt
A channel
A not
B channel
B not
Index channel
Index not
Max draw 200 Ma

This info came from a Kollmorgen product manual.

In South Carolina, USA

Mike