[vroemm]

Hi..

I have a Sanyo E681000C30 1000 line encoder.
It works on 5 volt.
Came with a Super U Sanyo Denki U718-012E 18 servo motor.

On the encoder there is a table which shows which color lead is what channel.
This is all clear.

But does the outputs need a pull up resistor ?
Or something else ?
To what type of input should these encoder outputs be connected ?

Thank you :-)

[mackeym]

those encoder lines are usually connected to a motor drive and used as feedback to read the motor position.

[unterhaus]

there are some encoders that do require a pullup, but they are rare. If you are having trouble reading it, it seems more likely that it's an absolute encoder, but this is a random observation on my part. Do you have a link to a manual?

[Al_The_Man]

Many of the small Sanyo-Denki motors that I have come across are single ended - open collector, but it should be easy to determine with power applied and a meter test, if the results are a bit vague, then try a 1k resistor to +v and repeat the test.
If they are differential, there is a good chance they are not open collector.
Al.

[vroemm]

I have tried the encoder.
Without a pull up resistor it gives a nice square wave.

[marting]

I have tried the encoder.
Without a pull up resistor it gives a nice square wave.

Hi vroemm,
would you mind sharing termination and relevant data information on how you connected your encoder. I've got 4 of them which I wish to utilise for my next cnc.
Thanks marting

[vroemm]

Hi vroemm,
would you mind sharing termination and relevant data information on how you connected your encoder

It has been 3 years ago.
And it was only a experimental setup.
I do not have the data you asked anymore.

Sorry

Vroemm.

[mike_Kilroy]

I have tried the encoder.
Without a pull up resistor it gives a nice square wave.

therefore 100% it does NOT need pull ups resistors.

[vroemm]

therefore 100% it does NOT need pull ups resistors.

Or perhaps i made a mistake.

Vroemm

[mike_Kilroy]

if u looked at the outputs with a scope, and the voltages were greater than about 2.5v on hi and close to 0v on low of square wave, then i dont think u made a mistake; if it was open collector u would not get a square wave output of these voltages.