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« on: April 23, 2021, 04:15:38 AM »
In this, and your other post on spindle speed, you don’t mention what sort of spindle you have, or whether you have a vfd to run it.
Looking at the controller you picture below, one way of connecting the water pump would be to connect a suitable relay to the spindle connections so it switches on whenever the spindle is powered up.
Re the 0-10 volts question you asked in the other thread, the 0-10v is meant to be fed to the analogue in (often labelled A0 and AI) connections of the vfd. You then set the parameters of the vfd to use this analogue signal to control spindle speed, rather than setting it manually. If you don’t have a vfd you would presumably have to set the speed in your g-code with an M3 S*********xx command.
Maybe let people know a bit more about your hardware so they can give some better answers than this one??