On Tuesday, February 01, 2011 12:55:00 pm Mark Wendt did opine: > On 02/01/2011 11:56 AM, gene heskett wrote: > > I was afraid of that too. and of course would be highly dependent on > > the quality of the shaft and its bearings its turning in. The dremel > > with its rubber mounted output shaft, even on the cable driven hand > > piece, would be an absolute disaster. I can remember the first > > dremel I ever wore out back in the 50's while building a 15 second > > 1/4 mile flathead 49 Mercury engine, the cutter wheel chuck was > > rigidly mounted to the motor armature and one could to .001" accuracy > > by hand with it. Todays version may have 3x the motor power, but it > > also has a chuck running in its own rubber mounted bearings that can > > be pushed .020" in any direction by hand. No way in hell can you > > carve a PCB trace that is truly precise with that, and it amazes me > > that folks even try. > > The shaft is not a problem - I machined that meself... ;-) The shaft I > used was actually the spindle. A 1 1/2" sanding drum conveniently fit > snugly to my spindles, so I rotated one of the spindle housings 90 > degrees to the horizontal, and mounted the sanding drum to the spindle. > The problem was, I had no way to securely snug the spindle housing to > the spindle plate at that setting, so the spindle "bounced" enough that > I could never get an accurate cutting pass. I don't have that problem > when the spindles are rotated to the angles required for cutting the > strips - there are circular path slots around the "axle" that the > spindle housings use to mount to the face plates. I couldn't cut a full > circle slot all the way around the axle though. ;-) > > > Anyway, if you have 70% of it done now, nothing we can suggest will > > get you finished enough faster to be worth stopping and building a > > new method. Sometimes the tried and proven methods do get the best > > results. > > Yeah, I've pretty much resigned meself to the fact that the forearms > will continue to expand. Mebbe you can bring that can crusher by this > weekend? ;-) > > Mark > Yabut, first I need to make it, my current one is all metal, nearly 20 years old and has yet to meet its match, but I haven't tried to crush one of those drawn steel cans yet either. It is one of those with the twin steel jaws, one of which travels down a pair of 3/8" guide posts, drawn together with a toggle linkage made out of 5/16" rod with an operating handle about 18-19 inches long. I can just keep stacking coke cans into it and make a 6 pack of 12oz cans be a ragged pile 3" in diameter and 3/4" high. I think I could use it to resize my 30-06 Ackley improved brass for reloading. But I have a 50 year old Herters O-Frame for that duty. ;-)
-- 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) <http://tinyurl.com/ddg5bz> Nothing increases your golf score like witnesses. ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
