Gerhard
Not sure why you are trying to use charge pump with the ESS, they were specifically designed for erratic behavior from the parallel port, your not using a parallel port as such. in one of the videos you will notice that i mentioned connecting a relay to the 24 volts that mach4 controls, this will do the same. Just need a relay breakout board that will take the amps and voltage and send it a signal from mach4 to activate.
I will be utilizing port 2 for my limit sensors within the week or so and changing the mechanical ones for proximity sensors, so i can check port 2 then.
DazTheGas