Hi,
I am setting up one of these BOB's which works off the parallel port. All options seems to be responding correctly but I have an issue with the spindle relay which is driven by P1. Whilst Mach3 is in use the relay can be turned on and off as expected. However during computer power up this relay comes on for a few second. Same during Computer power down. My intent was to use this relay to turn on and off the router but it would be dangerous if the issue at power up/down is not resolved.

Has anyone faced this problem before please?

Regards