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? ;-)
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