On Sunday 21 April 2019 14:12:36 Ken Strauss wrote: > If you are getting chips that are "almost dust" you have a serious > problem with your speeds/feeds. Increase your feed rate and/or reduce > the tool rpm. You should always be getting real chips. I find that ZrN > (Zirconium Nitride) coating on the cutters helps significantly to > reduce chip welding in soft aluminum.
So noted Ken. Now the trick is to get my ancient wet ram to remember that detail. I find over the last 2 decades, that I spend a lot of my time contemplating the here after. I go to get a tool, and when I get to where my memory says I last saw or used that tool, I have to stand there asking myself what am I here after. And worse yet I do not always succeed in recalling it. I don't recommend getting old, too much of that stuff goes with it... > > -----Original Message----- > > From: Gene Heskett [mailto:[email protected]] > > Sent: Saturday, April 20, 2019 8:58 PM > > To: [email protected] > > Subject: [Emc-users] milling tool life, or lack thereof. > > > > Greetings all; > > > > Having discovered the settings that control the low frequency boost > > in this VFD, and having rigged a pretty dry misting arrangement, I > > figured it was as good a time as any to cut the end panels of the > > box that has the interface cards in it. These panels are about > > .035" thick, and are hard anodized which presents a challenge to > > most carbide tooling. So I set it up to do the connectors holes in > > one panel, and the db cutouts for the computer cableds db 25's in > > the other panel. It did a beautiful job on the 11 holes in the first > > panel, but swapping panels to cut the db25 patterns was a disaster, > > the tool was obviously starting to plug up. So I wound up with > > ragged holes with lots of metal thrown up that I had to sharpen up > > my pocket knife and clean up. Didn't break the tool but probably > > pushed my luck on that point. Used about 4 oz of kool mist for the > > whole job, so it was wet, but not really soaking the cherry spoil > > board so bad I can't use it again after its dry. > > > > This was an uncoated sc tool, 4mm in diameter, 3 flute with about a > > 45 degree up spiral. Speeds ranged from 6000 revs to 14000. Chips > > thrown were almost dust and its obvious I need to put up some lexan > > splash guards. > > > > The fact that it plugged up tells me that kool mist is not the magic > > bullet for this job. Safflower oil, which I used for one job years > > ago, would be better, but the cleanup needs solvent, lots of it. On > > everything it settles on. Including your lungs as I used more air > > pressure and smaller orifices. Blame it on younger and dumber as I > > was then in my mid-60's, 20 years ago? > > > > Any suggestions as to what to concoct for misting fluid next time, > > that would prevent the sticking and plugging up while doing such > > sheet alu the next time? Or was the hard anodized brushed satin > > finish the real killer? Add some liquid dish soap to enhance its > > "sticky" maybe? IDK. > > > > Thanks everybody. > > > > Cheers, Gene Heskett > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
