[Hermitude]

What pin no's are your steppers for curiosity?

Well, I've mapped the parallel port but there's no numbering on the board itself. It's at https://www.cnczone.com/forums/chine...-software.html

The only signal connections between the controller and VFD are a GND and that one 1V signal pin I mentioned. So likely no DIR pin available. That signal only ever seems to perform as a crude on/off. It is always 0V off / 1V on during normal Mach3 operation. That's with an oscilloscope, not a multimeter. There is no PWM/square wave component to it.

[dazp1976]

Well, I've mapped the parallel port but there's no numbering on the board itself. It's at https://www.cnczone.com/forums/chine...-software.html

The only signal connections between the controller and VFD are a GND and that one 1V signal pin I mentioned. So likely no DIR pin available. That signal only ever seems to perform as a crude on/off. It is always 0V off / 1V on during normal Mach3 operation. That's with an oscilloscope, not a multimeter. There is no PWM/square wave component to it.

Looks like you have 4 pins to each stepper?. Well.
I think you are confusing the 5v+/- terminals as all different pins.
There is actually only 2 per stepper for pul/dir. Then 1 +ve terminal and 1 -ve terminal for Enable terminals on ALL drivers. For instance for 3 steppers you use 8 pins. 3 each pul/dir & 2 for all +/- 5v power.

If you are wired common anode then it's as follows:
5v+ to all these in parallel...... Enbl+ / Pul+ / Dir+.
5v- to...... Enbl- (or assign a pin to it and connect all drivers Enbl- to same pin.
Pin xx to..... Pul-
Pin xx to..... Dir-

If you are wired common cathode
5v- to all these in parallel...... Enbl- / Pul- / Dir-.
5v+ to...... Enbl+ (or assign a pin to it and connect all drivers Enbl- to same pin.
Pin xx to..... Pul+
Pin xx to..... Dir+

My basic parallel port map is as follows:
1= pwm
pwm GND is not classed as a pin (it's taken from pins 18-25)
2= X pul
3= X dir
4= Y pul
5= Y dir
6= Z pul
7= Z dir
8= A pul
9= A dir
10= estop
11= tool probe
12= X limit
13= Y limit
14= Stepper driver enable. Same pin goes to ALL drivers.
15= Z limit
Limit GND is not classed as a pin (it's taken from pins 18-25)
16= B pul
17= B dir or spindle relay ( depending on jumper setting
5V+ is not classed as a pin. Comes from psu. Same feed goes to ALL drivers.
5V-/gnd is not classed as a pin. Comes from psu. Same feed goes to ALL drivers.

That's the normal 12 outputs, 5 inputs, the rest are gnd.

[Hermitude]

Looks like you have 4 pins to each stepper?. Well.
I think you are confusing the 5v+/- terminals as all different pins.
There is actually only 2 per stepper for pul/dir. Then 1 +ve terminal and 1 -ve terminal for Enable terminals on ALL drivers. For instance for 3 steppers you use 8 pins. 3 each pul/dir & 2 for all +/- 5v power.

No, no. The pin mapping in that other post is just a different parallel port than what you are used to seeing. This machine I have runs a parallel port / cable between the controller box and the cnc frame itself. That cable contains each stepper's bipolar power lines and some NO limit switches.

I understand what you are referring to. The stepper EN/DIR/PUL logic signals which would normally run between the controller board and the stepper drivers. On this machine, the stepper driver boards are simply plugged into the controller board via some board-to-board edge connectors.