On Wednesday 26 March 2008, John Thornton wrote: >That must be a mighty small mill or very dull cutter... What SFM and chip > load are you running at? I don't have my charts here but from memory 6061 > needs to be cut at 300-500SFM. I normally use a two flute end mill for > aluminum. For a 1/4" 2 flute end mill I cut at 2500 rpm and 10 IPM again > from memory.
Note taken, I'll get some 2 fluters the next time I need some new ones. I can cut .025" deep at 10ipm IF I can keep my x table running free. It hung last night and chewed up the clamps it knocked loose pretty badly. I'm also haveing doubts about motor current, supposedly 2.5 amps, but the motors aren't heating very much, so I need to recheck the settings of my xylotex board. What I'm blaming on wear is now found to be the nut on the end of the x screw gradually working loose because the keyway allows the coupling to turn about a degree when the going gets tough & eventually I wind up with .30" of backlash cuz its the backlash adjustment. I may have to re-think that design in favor of a split clamping to totally stop that thou of slippage everytime it reverses. Question? Using STP as way oil, does that stuff stiffen up after a few hours? The usual Vactrex? is only available in 5 gallon pails at $90 around these parts. >.001"?? Double Ouch.. > >On 25 Mar 2008 at 22:47, Gene Heskett wrote: No, I didn't write this, I was replying to the person who wrote it, John. >> >Back on topic, I could definitely have used some cooling. I can only >> >dig through aluminum in 0.001" vertical increments, without stressing >> >things, or tearing apart my clamping assemblies, so it takes forever. >> >> .001"? Ouch. > >------------------------------------------------------------------------- >Check out the new SourceForge.net Marketplace. >It's the best place to buy or sell services for >just about anything Open Source. >http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace >_______________________________________________ >Emc-users mailing list >Emc-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-users -- Cheers, Gene "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) You will have good luck and overcome many hardships. ------------------------------------------------------------------------- Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://ad.doubleclick.net/clk;164216239;13503038;w?http://sf.net/marketplace _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
