On Friday 17 August 2012 10:15:07 andy pugh did opine: > On 17 August 2012 15:49, Gene Heskett <[email protected]> wrote: > > 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 > > I think rigid-tapping is the way to go in that situation. Peck-tapping > seems to work nicely with LinuxCNC when you have a spindle-encoder, > and I seem to recall that you do.
Not on the milling machine Andy, just the lathe, which is currently mostly disabled as I am in the middle of carving a x axis ball nut cage for it and have the carriage completely off it. Putting an encoder on it would likely entail the complete fabrication of a new belt driven 2 or 3 speed drive of some sort. I have had my name on the list as being interested in the one such belt drive kit ever offered for the micromill on the LMS site, but the maker of that kit hasn't made one in years, so its likely going to be me that does it if its to be done at all. There is no room vertically and internally to that oversized gearbox, so it would have to be rigged on the bottom, right where the wrench holes are, or extended out the top somehow. The existing 2 speed spur gear drive (=too darned noisy) in nylon will of course give up the ghost at some point, forcing the issue, at which point I will if physically able, probably build onto the front end of the shop building and make room for a GO704 Grizzly. Or clean out a corner of the garage for it, the garage being very well insulated, heated and AC'd. The existing drive of course hasn't the cajones to turn a tap bigger than a 6-32 in plastic anyway, so steel is out of the question & done by hand using the mill as a pilot guide only. 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! It's hard to argue that God hated Oklahoma. If He didn't, why is it so close to Texas? ------------------------------------------------------------------------------ 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
