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Originally Posted by
ger21
1_2 means port 1 pin 2. These are the UCCNC port and pin numbers, not the pins on the drive.
All of them are labeled in the manual.
Probably parallel port pin, which is what the port and pin numbers originally came from.
The A+ A- B+ B- are the encoder signals from the motor, and have nothing to do with UCCNC or the C76.