parallel_printer_port_signals
There is no schematic that I've found for the Mach3 CNC-machine interface board, but the signals are connected as follows, according to silkscreen text on the board:
| DB25 connector pin | PC Parallel Printer Port Signal | CNC control function |
|---|---|---|
| 1 | C0 | unused |
| 2 | D0 | X step |
| 3 | D1 | X Direction |
| 4 | D2 | Y Step |
| 5 | D3 | Y Direction |
| 6 | D4 | Z Step |
| 7 | D5 | X Direction (unused) |
| 8 | D6 | A Step (unused) |
| 9 | D7 | A Direction (unused) |
| 10 | S6 | E-stop |
| 11 | S7 | unused? |
| 12 | S5 | (X axis limit) |
| 13 | S4 | (Y axis limit) |
| 14 | C1 | Common motion enable |
| 15 | S3 | (Z axis limit) |
| 16 | C2 | B Step |
| 17 | C3 | B direction or Spindle Enable |
The interface board must be cabled to a parallel printer port on a PC. The parallel port must either be on the motherboard or on a PCI expansion card; USB control is not possible (see the linuxCNC documentation).
If curious, more parallel port information is at https://en.wikipedia.org/wiki/Parallel_port
parallel_printer_port_signals.txt · Last modified: 2021/08/02 22:06 by tell