On Monday, January 05, 2015 02:55:57 PM dave did opine And Gene did reply: > > > > My question is: Can these roundover bits actually plow where there > > is no 'edge' since the edge would not exist at that time? Plow the > > double sided groove, and then cut the piece out of the sheet. With > > 2" wide stock, if I cut them out first, then round the edges, I can > > get 6 pieces out of 2" but have a heck of a time holding them while > > doing the roundover, but if I do the roundover first, I can only > > get 5. Even so, I think I cn get the 50 I need from one 1/4" > > thick, 2" wide, 12" long sheet. My math is ditzy. And I have two sizes I need, some 1/2" square for the base rails, but I thought that was artistically a little big, so the ends and sides got shrunk to about .375 square, both with the rounded corners of the 1/8" bit as it made the 90 at each corner.
So I need a dozen 1/2"ers, and 36 3/8"ers. Which I can do out of one thin slab. And of course some spares of both JIC. > > Has anyone a better idea? > > > > Cheers, Gene Heskett > > Not necessarily better but at least different. I've been dealing with > a wimpy mill, akin to a BP. > Some plunge cuts with a .500 mill (center-cutting) will cause the x > and y reference to shift. > So.... drill an entry hole to depth or more, depending on your > application. Then use this as an > no-stress entry point for the cutter. YMMV. HTH > > Dave That hadn't crossed my alleged mind either. But I just discovered that solid carbide bits do bend under stress considerably. Using the same code to make a holder jig out of micarta, I had to expand the sw a thou, and still run it 4 or 5 times to get a pocket in the micarta that matched what it had carved in the Mahogany and its still about a thou small. So, as I cut the buttons out, I am going to have to go small on the depth increment, and slow on the feedrate else it will wander quite a bit when the last .250" of the mill is only a 0.03125" diameter. Gonna be slow IOW. And checking my router bit supply, a 1/4" roundover is the smallest I'd be willing to sacrifice the nose of. I have a dull single flute 1/4" el-cheapo and some diamond coated burrs, so I might even try making it. But my feet are complaining, so thats tomorrow. Gotta go figure out where I am going to find dinner with wheels on it. Its about din-din time for both of us. ;) I left the missus thinking about it as I came buy. See rule #2 of course... 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> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ Dive into the World of Parallel Programming! The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
