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General Mach Discussion / Re: Auto Tool-Changer and LPT2
« on: November 21, 2011, 05:59:11 AM »
Hi Keith,
There is the possibility that your LPT2 parallel card puts out the 3.3 Volt TTL standard and your ATC controller requires the 5 Volt TTL standard.
Perhaps measure the voltage present on the Direction pin - it should be 5 Volts when jog in one direction and 0 Volts when jog in the opposite direction. There are a number of options you can take if only 3.3 Volts is present.
Tweakie.
There is the possibility that your LPT2 parallel card puts out the 3.3 Volt TTL standard and your ATC controller requires the 5 Volt TTL standard.
Perhaps measure the voltage present on the Direction pin - it should be 5 Volts when jog in one direction and 0 Volts when jog in the opposite direction. There are a number of options you can take if only 3.3 Volts is present.
Tweakie.