The more I think about it the more confusing it becomes. There is the possibility that the speed control board may have been set up so that a cnc controler can jack into it. It looks as if there are post terminals on the board going to the estop, as well as the spindle speed and direction. There doesnt seem to be any hard wire connections going from the switches to the spindle motor. This is either a act of extreme forethought on siegs end for the retro fit to cnc or just a dumb design. I need to find the pcb layout to tell better. |