On Wednesday 30 January 2019 12:35:56 Stuart Stevenson wrote: > I would run at approximately 8000rpm, 20ipm and add lines to the > program to helical through the part without returning to center and > the last trip around would be just circular instead of helical (this > last is not particularly important). > I think you are running the spindle too fast and not enough feed for > soft aluminum. I would do the same for soft brass/copper. > Flood coolant or mist coolant either way would be just fine. WD40 is a > great cutting fluid for aluminum. May fog the shop in a mist sprayer. > Get an aerosol can and try it while cutting. > Being a good shade tree guy I have rattle cans of it, big ones. I'll give that a try on the next one, and see if I can re-enable the pot so I can slow it down.
Thanks Stuart. > On Wed, Jan 30, 2019 at 10:53 AM Gene Heskett <ghesk...@shentel.net> wrote: > > On Wednesday 30 January 2019 10:18:05 Stuart Stevenson wrote: > > > Are you cutting holes from solid or cutting the periphery of a > > > shape? > > > > Drawing the outside edge of the tool in a circle, dropping the plug > > in the middle most of the time, with z feed rates of about 10 thou > > per trip around the circle. Panel is soft alu, about 80 thou thick. > > > > The subroutine used: > > > > ( arguments passed are #1 tool_rad, #2 holerad #3 xloc, #4 yloc, #5 > > feed rate) > > o130 SUB > > G40 > > F#5 (feed rate) > > ( MAKE SURE IT CLEARS ) > > G0 Z#<_ZUP> ( clear work) > > ( go to center of hole ) > > G0 X#3 Y#4 > > ( drop tool close to work) > > G0 Z0.02 > > G1 F#5 X[#3 + #2 - #1] ( goto where edge of holestarts ) > > G3 I[-#2 + #1] J-0.000 Z#<_ZDN> P12 (I've had as low as 8 for the P) I'll take this next line back out. At ZDN. its well thru the panel anyway. > > > > G1 F5 x#3 Y#4 ( back to center of hole slow as full depth cut in > > case plug still there) > > G0 Z#<_ZUP> (back to clear) > > > > o130 ENDSUB > > > > ZUP is about 40 thou above work, ZDN is about 30 thou into the spoil > > board. Cherry in this instance, came from the scrap pile behind the > > chop saw. > > > > [...] > > > > Thanks Stuart. > > > > 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 > > Emc-users@lists.sourceforge.net > > 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
