Connecting chiller alarm output to HDM

[Julien]

Or install one of those spinny water flow indicators somewhere in the direct line of sight

Water-cooling (active?) flow indicator

Quick survey for those of you who own a water-cooled spindle, do you have some kind of coolant flow indicator installed ? After I installed everything it hit me: the coolant pump that came with my spindle probably costs 20$, and its failure can probably kill my 200$+ spindle in a few minutes. I see some of you use a visual indicator in the coolant line, I’ll go for that as a minimum: but I have a dream about some kind of inline flow indicator that would embed a bit of self-powered electronic…