Single ended spindle encoder (5i25+7i76)

What I mean is it's 5VP to the + of phototransistor and the - of the phototransistor to ENC +, sorry if I wrote it confusingly.

I think my thought process was that the phototransistor would not conduct at all when blocked, but I'm now understanding it simply changes resistance.

I'm afraid I don't fully understand how to wire up the resistor and what value to use. Would it go between the - of the transistor and ENC +, or from - to ground, while - also goes to ENC +?

Ah, totally missed that one. That did the trick, 100 Ohm resistor from the Phototransistor - to ground. Now everything's spindling just fine.

I have much to learn. Thanks a ton!