SDC2130 Encoder setup trouble

I am having trouble getting my speed to show up on the Motor Control Utility.

I have my encoder powered from a power supply for now, and it is outputting the expected waveforms (as checked on Oscilloscope).

I have the output channels connected to pins 4 and 8. (Channel A and B, respectively.) I am only using Motor Channel 1.

I have disabled the RC1 and RC2 (since they are on the same pins as ENC1A and ENC1B). I have entered in my CPR (334 in my case) and set the encoder to feedback mode for Channel 1 only. (Channel 2 remains unchecked).

I can run the motor in open mode but I can not get the data recorder to report any RPMs other than zero.

Just to be sure, under the RUN tab I have tried deselecting the Analog and Pulse In Inputs, and the Digital Inputs. No dice.

The only possible reason I can come up with is that the encoder output wave form is not quite reaching 5V. How particular are the encoder inputs?

As I am new to this controller, I am hoping my problem is something trivial that I have missed.

Thank you.

Adding to this a bit more...

The manual lists some requirements for encoders:

1. Two quadrature outputs (Ch A, Ch B), single ended or differential signals CHECK
2. 3.0V minimum swing between 0 Level and 1 Level on quadrature output CHECK
3. 5VDC operation. 50mA or less current consumption per encoder (I ASSUME THIS IMPLIES THE USER IS TRYING TO SUPPLY POWER FROM THE 5V/100mA OUTPUT PIN ON THE CONTROLLER. IF ONE HAS ANOTHER POWER SOURCE, THIS ISN"T TECHNICALLY A REQUIREMENT.)

I discovered the problem and want to feedback in case it helps others.

The controller requires 3V differential from the encoder. My output measured over 4V peak to peak. However, I realized (using o-scope) that this peak to peak was including noise, and the actual peak to peak was something around 2.9V.

My encoder runs on 3.3V +/- 5%. Therefore, I increased the supply voltage (power supply) by 5% to the top of it's range and this caused the output differential to reach 3V, at which point the controller detected it.

I wish the sensitivity level of the encoder input could be adjusted.

I hope this helps someone.

It is recommended that you supply the 5V from the controllers internal 5V. That is on pin 14 of your I/O connector.

But if your encoder uses 3.3V operating range it would definitely be different.

I am trying to inquire if I can drive the encoder at 5V, or if this would damage the encoder.

I don't suppose you will consider adding a user-selectable voltage on pin 14? :)

What you can do is create a voltage divider much like what is used on an analog device (potentiometer).

So lets' say you take a 5K potentiometer and wire that to +5V and Ground. The center tap wiper wire is the voltage you can adjust by turning the pot, and this same wire is where it would connect to the encoder lines.