01-01-2014, 03:26 PM
(01-01-2014, 03:02 PM)Micktoon Wrote: Nice job there Terry, How do people find these systems work , sort of pro's and con's , there seems to have been a few mentioned about the forums latley.
Thanks for posting , Cheers Mick.
So far, I have been very happy. There is no fog what-so-ever, whereas the old Mistic Mister I have fogs up the shop in no time.
As far as cooling, I am impressed. I was doing some end milling on a piece of 1/4 inch mild steel, taking about .040 DOC passes at about 6 in/min. I had to make several passes to level out a jagged edge. I was using an HSS end mill. I set up the mister to keep a tiny (just receptacle) puddle of coolant running ahead of the cutter. At the end of each pass I checked the work piece by touching it. I was surprised that the work piece felt cooler to the touch than vice it which it was clamped. As an experiment, increased the feed rate and cutter speed until blue chips were being thrown (I know because a couple landed on my hand and branded little smiles). After this pass I stopped the mill to check temps. The cutter was cool to the touch and the work piece was still cooler than the vice. I have been using "Cool Mist" at the normal dilution. About 4 hours of milling consumed less than 6 oz of fluid. The work comes out mostly dry, but there is a slight oily slime left on the vice from the lubricant in the Cool Mist. Apparently, the chips come out so fast that they are not cooled, while the cutter and the work place remain under the mist application and a gentle air blast which evaporates the water and helps to clear chips from the cutter. There are commercial versions on the market that actually use a small metering pump to meter the fluid into the mister, but these are fairly expensive, and intended for the professional shop. There is also one commercial version on the market that uses compressed air and a metering valve similar to what I have built, if you don't want to go the home-made path.
http://www.tormach.com/store/index.php?a...&ref=32682#
If you do a search on "fog less mister" you will get several versions of home built misters, some with YouTube vids showing operation and construction.
Terry S.