This is weird...firstly, I used a separate PSU instead of the 9v battery. The voltage was 5.23v and this operated the relays
perfectly.
I thin decided to make up an LPT cable with only the wires required...ie, 25, 14 and 16. Tested this with the 5.23v PSU and
it worked fine.
Connected the 3 wire LPT cable to LPT2 and the ATC controller, started up Mach3 and checked the Ports & Pins and then tested
the system.
NOTHING!
Tested the voltage at pins 14 and 16 and it's as before...5.05v. Back to the PSU or battery, and it works fine!
I have swapped LPT2 for LPT1 and reconfigured the Ports & Pins to port 1 but this doesn't work either.
Would current have anything to do with it?