Harrison M280 CNC Lathe, Setting up Threading using phototransistor

Hello, I'm setting up my CNC Lathe, currently using a Mesa 7i76E and Zotac Zbox mini PC. I have a question regarding adding a spindle encoder, I'm currently using two Omron EE-SX1096-W11 and a wheel with 50 holes. This is what was originally on the machine. So now I need to hook up the 2 phototransistors to the Mesa board, should be pretty straight forward, but after looking at the spec sheet on these encoders I see that I will need to use resistors. I'm listening to any and all advice. I've searched around online and most people seem to use a rotary encoder that makes things a lot simpler.

Thanks!

Links to the spec sheets.
Phototransistor www.digikey.com/en/products/detail/omron...E-SX1096-W11/5864619
Mesa 7i76EMesa 7i76E

You need a current limiting resistor for the LED (say 180 Ohm for about 20 mA LED current) You don't need pull-up resistors as these are built into the 7I76E

So (for 'A')

+5V --> 180 Ohm resistor --> LED Anode --> LED Cathode --> GND
7I76E 'A' --> Transistor collector --> Transistor emitter --> GND

Thank you so much! This is exactly what I was looking for. Have a great day.

Hi Andy, I removed the original control board, I felt like it would have been far more involved that simply gutting it and starting fresh. I'm currently using DM860A and DM556 drivers for the Z and X axis respectively. I've been struggling to setup the encoder signal going into the Mesa card and Linuxcnc. I followed the standard Mesa 7I76E wiring diagram and configured the spindle encoder using PNC config. I have attached my Hal file as well, I'm not seeing the connection to the pins on TB3 in the Hal file. It feels like I am so close to having this all up and running.

Thanks for the help Andy, it's mostly setup now but there seems to be a problem somewhere. When I command a G33, the machine does not move. I am getting encoder feedback though. I can adjust a variable in my Hal file to get motion with a G33, but it moves extremely slow! I feel so close to completion!

Here is a link to a video I took of this problem.

Any advise is appreciated! I will keep looking at other peoples files.

Hal and INI in original post.

Hi Andy, looks like there is a problem. I opened Hal Scope and I didn't see a change on spindle.0.revs signal even as the spindle is turned on. Also spindle.0.index-enable is always off. I'm currently using a manual switch to turn the spindle on and off. I used PNC config to make the hal and ini files.