Hi Michael
Its going to take a little time to produce a wiring diagram for the connections of the contactor to the spindle motor speed control / power supply
provided the relay can cope with the switch on surge current
use the relay to switch the mains supply to the spindle speed control / power supply
needs work but this is a start until I have sorted out the PC
Attachment 435654
I need to make space on this PC's 2Tb C drive as it only has 2.54 Gb of space !
having downloaded some very large files today
I need be able to use it to buy tickets at 9 am tomorrow for a concert in October so I don't want to dig my self into a hole just now
its too easy for a simple job to turn into a nightmare - been there done that
Once I have the tickets
I can leave it backing up / moving files all day, including while I at the Caravan Palace concert
{they are a French electronic music band }
John