With this interpolated motion there is no need for spindle reversal when tapping
it is also faster as the tool can move out from the hole rapidly On Fri, 2017-02-03 at 18:06 +0700, TJoseph Powderly wrote: > i've not done it with linuxcnc > we did it a lot in heidenhain tnc controls for sink edm > > google thread milling > > you need a tool with the correct pitch on smaller shank than the drilled > hole > > how the metal is attacked can be: > goto to the bottom before interpolating an expanding circle > or > helix down at the desired radius > > multiple passes can do roughing and finishing > > Linuxcnc has the primitives to do this > this is an application not a special motion ( afaict ) > > the problem in sink edm was that the leading edge of the tool wore out > quickly if the tapping was plunged > versus > if the path was interpolated (expanded laterally from center), > then the tool wear was evenly distributed over the tool face > > i'd think the same advantages occur in chip machining > > also a larger cutting interface occurs ( not a single leading point ) > > it was a real advantage when making large diameter threaded plugs ( > > 100mm dia ) > and its really simple program > > tomp tjtr33 > > > > On 02/03/17 14:59, Valerio Bellizzomi wrote: > > http://www.infodelta.it/foto/film/filettatura%20interpolata.mp4 > > > > > > > > > > > > > > ------------------------------------------------------------------------------ > > Check out the vibrant tech community on one of the world's most > > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
