I'm working on moving my front panel from the electrical enclosure to a machine arm, but don't want to lose the computer power switch, indicator lights, load meter, etc. That requires replacing that front panel circuit board, which is soldered directly to the snapped in switches. Sigh.

Since the manual didn't have the pins, and the Tormach tech support wasn't as helpful as I needed, I mapped the pins of connector J3, so I can move the LED indictors, the accessory probe input, and (in principle) the manual spindle controls.

Here's the pinout, so anyone else looking to make a machine arm mod doesn't have to take the 20 minutes I did.

Connector is a 16-pin, 0.1" header in 8x2 pattern with IDC 16-pin
connector on a ribbon cable. The cable connects to J3 (Console) on the Machine Control Board.


Pin 1 of the IDC 8x2 connector to the top.


Looking at the back/bottom of the circuit board, pins are:
Pin 1 this side
Start Sw top O O Auto/Manual Sw top
Fwd/Rev Sw top O O Stop Sw top
Probe input (Blue) O O Bottom of all switches (probably gnd)
Potentiometer top O O Probe Green (signal gnd)
Potentiometer center O O Potentiometer bottom
LED white (-, ) O O LED red (+12V, )
LED green (-, ) O O LED blue (+5V, )
Probe red, +12 V O O Probe white, +5V

Colors are the wire colors in the PCNC 1100.

With this table and an IDC breakout board (Amazon has them for $10), it is easy to replace the front panel circuit board and move the indicator lights, switches, etc. to a machine arm.