On Sunday 27 May 2018 10:06:10 Gene Heskett wrote: > On Sunday 27 May 2018 09:02:21 Ken Strauss wrote: > > Paypal is an option. > > According to their web site last night, paypal is not accepted. Using "collet black" as a search term on fleabay did get some hits from NA places. But I've come to the conclusion that a gear drive hose clamp on the nose of the R8, and the tables tailstock on the far end of the workpiece is still subject to too much slippage opportunities.
So I am going to round up a block big enough to cut a half circle that just fits the relaxed size of the r8 collet at the bottom of the skirt, and clamp that to the table under the end of the r8. That, combined with the tail stock should prevent it canting when the pressure of the drill hits it. I was cutting a flat on the side so the drill didn't walk, but found a better idea, bring the drill to within a half a mm, then go down at 2mm/minute and the drill doesn't walk while making its starter dimple, then send it on down to intersect the central tap shank bore at about 40mm/min. But that seems to harden the brass at the point of contact, and the force of speeding up the drill pushes the workpiece canted lengthwise. Back off and then come back down and it seems to cut thru the hard layer and keep going. Fix my code to make that move, and make a follower to brace the bottom of the r8, which is sticking out of the chuck around 4" and has no clamp on the workpiece other than its friction fit. Or, better yet, size the follower to fit the bottom of the workpiece and put it directly under the drills path. Yeah, I like that even better. I've still got about 40 left to do. Now if I could get one of the neighbors kids to cut my grass, its a jungle, and in the middle 80's here. -- 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> ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
