I've spent quite a few days in a Chrysler transmission plant servicing CNC machines and as I recall every machine I worked on used regular flood coolant, although some of them may have had high pressure systems - still flood coolant. Some of the machines were cutting steel, but many where cutting the transmission case and case components which are primarily aluminum.
Dave Gene Heskett wrote: > On Saturday 21 November 2009, Jeshua Lacock wrote: > >> On Nov 21, 2009, at 9:55 AM, Gene Heskett wrote: >> >>>> My first attempt was in olivine sand, and I had about 1/2 inch layer >>>> of black quartz fused around the casting! >>>> >>> I'll bet that was NOT fun to remove without damaging the casting too >>> much. :( >>> >> Lets just say I wrote that one off as an experiment. >> >> ;) >> >> > :P > > >>> In graphite I'd think the cooling would be pretty slow, but the >>> finish should >>> show the machining marks in the graphite I'd think. With thought & >>> carefull >>> design, that mold should be re-usable several times too. >>> >> You got it! >> >> One of the main reasons I have been building a CNC machine is for >> making patterns and molds... >> > > Which generally, means a larger machine, but it can work in easier to cut > materials too. I wish I had the time and space to build a gantry with a 2x4 > foot vacuum bed & at least a foot of z, two A's and whatever the ability to > swing it in both directions, the Z axis motions would be called. I hate > hogging out the thumb holes in a gun stock by hand. First time, its fun. > 2nd, a chore, 3rd and beyond tend to qualify for the PIMA description. ;) > > I'm contemplating a 4th pass since the 3rd one turned out to have been tried > on an explosive piece of fawncy Maple. It was cooked, but it was far from > dry & took several ounces of superglue to keep in in one piece, and has now > had another decade for the other half of that plank to stabilize. The gun > its holding, a TC Black Diamond 50 cal, has decided to shoot very well since > I pitched the 209 primer carrying breech plug and put a #11 nipple in it. > The 209's fire come hell or even high water, but are way too brutal and lift > the rammed bullet clear of the packed powder before the powder can get a > decent explosion going, and that lack of a solidly rammed load can make a > decent gun shoot a shotgun pattern at shotgun ranges. With the #11 musket > cap, its doing 2" to 3" groups at 50 yards, not great but will put venison in > the freezer, and 3 feet smaller then the same load being lit by a 209 primer. > > I made a #11 carrying breech plug for my other coal burner, a TC Omega 50 cal > with the factory thumb hole stock, but the firing pin is so well centered it > goes right down the middle of the nipple, putting a very nice dent in the > cap, but with nothing under the middle of the cap for an anvil, it doesn't > fire. I hit the first one about 6 times without cracking it off. Gave up. > With the 209's lighting it, it is not reliably on the paper at 50 yards. I > hear they are making a puny powered 209 these days, but none of them seem to > have filtered down to the gittin places of unwashed shooters of charcoal > burners yet. > > Centerfire season opens here on Monday if you can't tell. I think I have a > place to sit & let the dust settle on my eyeballs, till something wanders by. > > If I can keep my diabetic feet warm that is. :( > > Humm, not much left on topic in this here thread. ;) > > >> Best, >> >> Jeshua Lacock >> Founder/Programmer >> 3DTOPO Incorporated >> <http://3DTOPO.com> >> Phone: 208.462.4171 >> >> > > ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
