I have a fun subject…just out of curiosity, what is everyone using to keep the laser nice and cool? We got a small mini fridge with a jug of distilled water inside. We drilled a hole in the fridge for the tubes. Our regular jug of water kept getting really hot, which caused the laser cutter to not cut well AT ALL.
A big portion of cooling is having enough water. Our K40 uses a 5-gallon bucket of water on a concrete floor.
My K40 also uses a 5 gallon bucket with 1 gallon of antifreeze and 3 gallons of distilled. I have the pump in there and also a fish tank heater that keeps the water at 75 degrees F all the time. I don’t focus on keeping it cool as much as I focus on not thermal shocking the tube by having water that is too cold running through it. That’s a great way to crack the tube. So my regular routine is to leave the pump and water heater on since they draw very little power and then before I use the laser I switch it on and leave it for 10 minutes or more. I have not had an issue with it being too hot yet. I am getting ready to order a temperature gauge and flow meter for the water so I can keep better track of it. One reason my unit stays cooler is because I dumped the old fan and got a new one. It creates a really nice breeze in both the electrical bay and in the laser tube bay. I think having the laser tube bay enclosed causes a lot of heat to build up in the summer so I may ventilate the bottom of the laser tube bay so the fan can draw heat out and cooler air in from the other side.