Originally Posted by john-100 From what I can see from the photos it looks like the wiring is correct the main thing is the printer port adaptor is set up correctly with pins 2 to 9 set up as inputs If its like the the first printerport with pins 2 to 9 set as outputs you would have the rotary encoder A & B outputs connected to printer port outputs which could damage the encoder and printer port John I tried to reinstall mach 3 to get the port drivers to work properly
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