Snip from 3-3-03 Armadillo update **** When I first got the CNC mill, I had visions of just writing the programs and letting the machine busily mill away for hours while I did something else. With a high pressure coolant flood system it would probably work out like that, but I don�t want coolant spraying all over my garage, so I only use a minimal amount of manually applied cutting fluid, and I wind up baby sitting the mill quite a bit to clear chips away... ****
John, You may want to try compressed air in place of coolant. It is used where I work for hard machining. They use it because coolant would cold shock the insert/endmill every time it came out of the cut(hard milling gets very hot). Manual coolant with carbide tools is usually not a good idea due to cold shock. It only takes a second without coolant to get the tool very hot. Cutting oil is not as harsh because its not a very good coolant (great for surface finish though). Dry machining 300 stainless should not be a problem with the proper tool. Coolant is only necessary for maximum productivity. Contact the tool vendor for feeds and speeds for your tool in dry conditions. Endmills can plung cut(assuming that its endcutting), but they are not very good at it. Drilling is a very good idea. You can also ramp the tool into the slot. 5-10deg ramp is common. Production machinist do this to save the time waisted in tool changes between drills and endmills. Adam Uhl --- John Carmack <[EMAIL PROTECTED]> wrote: > http://www.armadilloaerospace.com/n.x/Armadillo/Home/News?news_id=195 > > Short update. > > _______________________________________________ > ERPS-list mailing list > [EMAIL PROTECTED] > http://lists.erps.org/mailman/listinfo/erps-list __________________________________________________ Do you Yahoo!? Yahoo! Tax Center - forms, calculators, tips, more http://taxes.yahoo.com/ _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
