I built my own cnc machine and spent about 6 weeks researching mist cooling systems, and trial and error. This caused alot of dilemma for me.
Dealing with air pressure, spray, siphon nozzles and sensitive to the slightest form of blockage, mess, and lots of extra devices - I found it was much easier to use a flood-coolant system.
I have a $10.00 magnetic waterfall pump in a bucket (from harbor freight) connected to a loc-line hose w/ nozzle pointed at bit - so it does a small stream of oil. Run-off is filtered thru a pan back into the bucket.
A pump, some hose, and a pan/drain. That was it.
But most of the time the chips kinda travel as a river out of the way.
Now there seems to be a buildup of chips from time to time, so I added another loc-line hose nozzle as air-only. This way, every now and then I press the button and it shoots air. When I mill plastic, I just turn off the oil, and run air-only.
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