Stuart Stevenson wrote: > The most important finding is the ultimate usefulness of tapping this way. > It seems novel but is it a useful tool? Putting it on the Cinci or Viper for > 5 axis MPG tapping would be killer! > Well, I don't do those hideous aerospace metals. But, I have done some rigid tapping in aluminum with 2-56 up to 10-32 taps, and found it to be great! I have no desire to do these by hand, even if the power is supplied by a motor. I have broken a couple taps. One thing that gave me fits was that my spindle VFD kept shutting down with an "electronic overtemp" fault. I finally figured out this really meant the electronic motor protection feature was shutting it down to save the motor, but the Bridgeport motor was purposely derated to allow plug reversing all day, so it was NOT in any danger of actually overheating. So, I just turned off this option. After that, I was able to do hundreds of holes with no broken taps. I use combo drill-taps for the thinner materials, and spiral point taps for the thicker stuff, after pre-drilling. I use alum-tap as a tapping fluid, it is certainly magic stuff.
So, at least for the stuff I do, I really don't think it would be anything I'd use. The haptic feedback sounds interesting, but with the mass of even a Bridgeport motor behind it, I think you'd break the tap before the motor could stop and reverse. When hand tapping, there is so little mass turning the tap that you can stop and reverse easily when you feel a bind-up developing. Jon ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
