On Friday 17 August 2012 10:41:54 Dave Caroline did opine: > On Fri, Aug 17, 2012 at 2:49 PM, Gene Heskett <[email protected]> wrote: > > On Friday 17 August 2012 09:30:45 andy pugh did opine: > >> On 17 August 2012 13:48, Stuart Stevenson <[email protected]> wrote: > >> > Some tapping heads will release after a set amount of extension of > >> > the head components. These heads also self reversed upon axis > >> > retraction. This allows the programmer to drive to a position - > >> > dwell to allow the head to reach extension and release - reverse > >> > motion to retract the tap. > >> > >> This seems to indicate a need for not one, but several, non-rigid > >> tapping routines. > > > > Also I believe, it would be valuable to have a discussion of the > > various offerings, so that I for instance, who might have a need for > > tapping 40 each 6-32 to 10-32 holes to a depth of perhaps 1/2" > > occasionally, might stand a chance of actually buying something that > > works better that I can do. So far as I know, no mechanical tap > > driver can do that, the 6-32 needing several reversal extraction > > cycles to clean and re-apply the cutting oil if any hope of reaching > > that half inch depth with full thread depths is to be expected > > without broken taps by the pound, and the associated lengthy edm > > sessions that involves when trying to save the part. > > The important part is use machine taps not hand taps > > JT has a little guidance > http://gnipsel.com/linuxcnc/g-code/taps.html > Bookmarked, thanks. I have been using hand taps as that is what is locally available. But that is of course fixable with a phone call to Ohio.
> also would be nice to measure the torque while tapping this > means you can swap out a tap when it dulls That isn't a huge problem as I have an ammeter in the motor circuit so I can see how close I am to blowing a fuse, usually about 250 ms before it blows. :( The feedback is so stiff that how hard the motor is working isn't at all easily heard. > > Dave Caroline > > ------------------------------------------------------------------------ > ------ Live Security Virtual Conference > Exclusive live event will cover all the ways today's security and > threat landscape has changed and how IT managers can respond. > Discussions will include endpoint security, mobile security and the > latest in malware threats. > http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers 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) My web page: <http://coyoteden.dyndns-free.com:85/gene> is up! Everything is possible. Pass the word. -- Rita Mae Brown, "Six of One" ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
