Safe Spindle Control

I will be using a SSR (Solid State Relay) to turn on/off my spindle, wired to
a SPDT (center off) switch (ON/OFF/AUTO), then to a pin on the parallel port
(active high).

Now from what I understand the parallel port can act funky during power up or
reboot (toggling the signals out of the port till stabilized).

I understand Mach has some 8KHz pulse stream (but no idea on how to use
that), plus I use TurboCNC and EMC once in a while too.

Is there anything that can help resolve the funkiness no matter what the
controller might be? I'd hate to have a cable come loose (as example) during
a manual tool change and the spindle startup for a few seconds *OUCH*.

Yes, I could hit the switch to OFF, but the kinda defeats the purpose of it
at all, and I'd hate to forget to flip the switch back to AUTO and have the
tool plunge into the material not spinning *CRUNCH*.

Thanks,
Jim...

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