gene heskett schrieb: > > Guy's, maybe I don't understand cutting alu as well as I thought. > > Cheers, Gene > Gene, just don't make so much fuss of the oxidizing bit. Run the machine at its highest revs (al least with these small cutters), don't think about it, take as big a chip as the machine and workpiece suspension will take, and happily mill away! There are zillions of mills and lathes out there where nobody thinks about oxidation. I used to have (retired now) a medium size Deckel-Gildemeister milling center in my company's work shop which produced a lot of alu workpieces, adjusting its speed of rotation automatically to the bit size. Small cutters like yours usually run at 16000 to 25000 rpm there.
Climb milling is preferable if the backlash of your screw will permit it. Blades will always cut into fresh material, less friction, less heat. With small cutters, you may compensate for backlash with a fairly large retaining spring. Making tiny chips enlarges the alu surface and promotes oxidation, if that is your fear. So, make large chips instead. If I were you (it's about as cold in mine as in your shop) I would make myself a nice encoder pattern on foil with my laser printer and etch the thing out of thin copper or hard brass sheet in my warm kitchen. By the way, I bought three encoders, 512 lines, for 10 Euros at ebay last year, marked as defective. Two were ok, the third needs some attention. Best regards Peter Blodow ------------------------------------------------------------------------------ Keep Your Developer Skills Current with LearnDevNow! The most comprehensive online learning library for Microsoft developers is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3, Metro Style Apps, more. Free future releases when you subscribe now! http://p.sf.net/sfu/learndevnow-d2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
