Huanyang VFD, how to get Waterpump switching on with UPF/DRV/DCM connectors?

[chefffe]

Yes it makes sense, just dont know what you mean with "flood".
I am still in building phase of the CNC. Meanwhile I drive the pump simply with +24V and DCM triggering a 24V Relay. That means its always on when VFD is on, thats good enough for now. I will later on realize your idea with switching from Ramps with Gcode which is pretty smart.

I build a complete watercooling solution like for PCs with radiator and fan. What I read in the net, the Spindles dont need high flowrates so the little 12V pump should be enough (I hope).
Another question is for Machine Safety. I included a Killswitch which cuts the 230V input power completely. Now I read somewhere that its better to kill just the wires to the spindle, so that the capacitors cannot uncharge via the spindle and making the spindle down time longer? Is that true?
Do you all use RCD Type B for your CNC with VFD?