I am nearly finished with my Portable MPCNC build. The last couple of days, I built a system for keeping the 1.5kW water-cooled spindle cool. It came with a submersible pump. I got some nice nylon tubing that is more flexible than the polypro tubing it came with, and clear so I can see inside it. Quick-release no-drip couplings will make set up and tear down easy. I put the pump in a clear bucket (for bird food balls), sealed up the tubing and wire inlets with Sugru, and built a stand to hold it and the CPU-cooler radiator. (no, I didn’t use a CNC to make it). I programmed an ESP32 board with a small screen to indicate the temperatures of the coolant, pre- and post-cooling. It will beep an alarm if the spindle gets too hot. What do you guys think is a temperature that might damage a spindle? I was thinking of setting the alarm at 50C.
Here are a few photos. If anyone wants more details, just ask.
The control cabinet is the grey toolbox in the background, still a work in progress. I will post more about that when it is finished.