Originally Posted by
Torchhead
Each input on a BoB should have two wires. You need 3 dedicated Inputs (for UP/DOWN and ARC OK) and one dedicated output to fire the torch. Not to sure what the output for anti dive is all about though. As you stated a single parallel port MACH3 setup has 5 inputs and one has to be for E-Stop. Use three for THC and you have one left for ALL your other inputs. YOu can added a second parallel port card and another BOB and get more I/O.
You have some interesting surprises in store trying to use this on a CNC plasma table.