Hi Guys
I`m trying to use the Spindle commands M3 (ON) and M5 (OFF) in Mach3 to generate the TTL Signals to
open/close my micro-dispensing valve. Mach3 is set to use Port 1 Pin 16 and this connects to the s c r e w terminal
of my Xylotex 4 Axis Board.

Now my problem. Without the valve connected in any way I can issue a spindle ON command and measure 3.90 volts
between pin16 and GND on the s c r e w terminal, as soon as I connect this to my valve driver the voltage drops to 1.7v
I`m getting no signs of life on the valve.
How come I`m not measuring 5v with nothing else connected ?
and why is the voltage dropping to 1.7v

Would it be possible to use a 2nd port in Mach3 and maybe send the spindle signal out on the RS232 (COM1 Port)
then at least it would be independant of the Xylotex Board.