Rotary Encoder angular input connection

[python1478]

Hi I have just built my new TDK-40 4 port adapter.
If I wanted to use the 4th (W) connector for a rotary encoder on a rotary table, how would I connect this? The port is labelled like the other 3 with standard quadrature pinouts.
Regards
Colin

 

[python1478]

@ycroosh

 

[ycroosh]

@ycroosh

Colin,
What exactly are you asking? I.e. I can answer your question as "you plug it into the board", but I suspect that's not what you want to know.
Do you have any sort of spec for the encoder? Supply voltage? Output type?

Regards
Yuriy

 

[python1478]

Colin,
What exactly are you asking? I.e. I can answer your question as "you plug it into the board", but I suspect that's not what you want to know.
Do you have any sort of spec for the encoder? Supply voltage? Output type?

Regards
Yuriy

Hi Yuriy, I don't currently have anything to connect and it was probably more a general question as I'm not that familiar with rotary encoders. Some quick research indicates that they appear to have an equivalent to the A/B outputs with one phase shifted by 90 degrees. So I assume I should be able to connect these to A/B and then just voltage and ground. Am I understanding that correctly?

 

[WobblyHand]

Rotary encoders come with a variety of interfaces, so you need to get one that is compatible with Touch DRO. My rotary encoder has open collector outputs so I needed to add pull up resistors to read their outputs. Mine is on a spindle encoder so I needed some 500 ohm resistors because it goes fast. For low rotation speeds you can use 2K or 3K resistors to 5V or whatever voltage is required by Touch DRO.

My rotary encoder output has an A, B, and Z outputs. Z marks 0 degrees. To my software, I treat counting up and down identically between linear and rotary encoders. But obviously we need to treat rotary encoders differently since we return to 0 degrees every rotation.

 

[python1478]

Rotary encoders come with a variety of interfaces, so you need to get one that is compatible with Touch DRO. My rotary encoder has open collector outputs so I needed to add pull up resistors to read their outputs. Mine is on a spindle encoder so I needed some 500 ohm resistors because it goes fast. For low rotation speeds you can use 2K or 3K resistors to 5V or whatever voltage is required by Touch DRO.

My rotary encoder output has an A, B, and Z outputs. Z marks 0 degrees. To my software, I treat counting up and down identically between linear and rotary encoders. But obviously we need to treat rotary encoders differently since we return to 0 degrees every rotation.

Thanks for the insight. As stated above I don't currently have a rotary encoder for the connection in mind so when the time comes I will source out a unit with compatible connections

 

[ycroosh]

Thanks for the insight. As stated above I don't currently have a rotary encoder for the connection in mind so when the time comes I will source out a unit with compatible connections

The encoder needs to output 5V quadrature signal. Push/pull is best, but NPN ("sinking" or "open collector") is fine too.

 

[python1478]

The encoder needs to output 5V quadrature signal. Push/pull is best, but NPN ("sinking" or "open collector") is fine too.

Thanks
Yuriy