Hi x-rayman,

I started from scratch using the Win98 laptop with serial port and installed Ver2.7 of the conectl software. Pressing F6, then entering the Machine Menu and selecting Machine Control. 'On' appears immediately to the right of Machine Control in the menu, but nothing else happens and the software becomes unresponsive. Because the 'on' appears, I'm sure that the lathe control board is initially communicating with the laptop.

When I operate the main ON/OFF switch on the control panel and the fan comes on, but no relays operate. There are two large Schrack BRL 205024 relays and, having done a quick wire trace, it looks like one connects live to the spindle motor control board; and the other connects +35V DC & Ground to the slide carriage and feed screw stepper motors. These relays clearly need to operate before anything will happen, so I need to identify why they are not operating.