Loss of power to spindle with PC and SLB on UPS

Community Discussion šŸ“„ General
1

Iā€™m prepping setup for the arrival of my Altmill. I will use an UPS for the gControl and SLB. The spindle will be on a separate circuit with no UPS.
Question is, what happens if the spindle loses power? Will the SLB sense this power loss and pause the job? Or do I break bits?
It would be easy enough to add a relay in the e-stop control, and less expensive tha adding a 2nd UPS.