[johngalt47]

I am working on converting a water foutain laser cooler the laser I have is a 60watt co2 chinese laser. The heat load is aprox 20btu per watt.
the small water fountain 4 gph is a bout 1340 btu.
this should work with a 60 watt laser
a 8 gph should work with up to a 120 watt co2
looking for help in completing this design

[johngalt47]

I paid 50.00 for my water foutain on this project. not many people use tjhem any more ther are very available real cheep

[ThomasWayne]

A while back I solved this issue rather neatly for my own needs, using an "external cannister filter" for a fish tank. Plenty of flow and it's a self-contained unit. Been using it fro some time now and love it.

You can find a link to the exact unit I'm using here:
http://www.cnczone.com/forums/diy-cn...l_spindle.html

TW

[johngalt47]

I have the system up and running and doing a great job. very low duty cycle on the comporessor. it even lowers the temperature while cutting at 80% power on a 60watt laser. i have3 ordered a electronic temperature controller that will allow me to control the cooler circulation pump at 70 deg f and the compressor at 60 deg f. that way the water tank in the cooler will maintain 60 deg.f at all times and the circulation pump will control teh laser temp.
this should speed up the start up time right now it is about 20 min at 85 deg ambient.

[keebler303]

Where are you measuring laser temperature? I would advise against using flow to control the temperature. Just hold the water at the correct temperature and recirculate it as fast as you can. This will provide the most stable laser temperature which will give you the most stable output power.

Matt