Thanks Gene. At the time I didn't know what I was getting. I'll take a closer look now that a I know a little bit more of what I don't know. John
> -----Original Message----- > From: Gene Heskett [mailto:[email protected]] > Sent: July-08-21 12:28 AM > To: [email protected] > Subject: Re: [Emc-users] Power Tapping > > On Wednesday 07 July 2021 20:45:21 John Dammeyer wrote: > > > Thanks > > So how did you work out how far it overshoots? > > John > > > > > From: jrmitchellj [mailto:[email protected]] > > > > > > Spiral flute taps for blind holes. > > > Spiral point taps for through holes. > > > For aluminum, I use uncoated, or bright HSS taps. > > > > > > I have been doing alot of m2 & 4-40 holes with rigid mounted taps, > > > none broken! All blind holes. > > > The difficult part is figuring out how far the spindle overshoots > > > (rotation) for reversal. On my milling machine, I have it down to > > > half of a rotation overshoot, using the braling on my Yaskawa VFD. > > > > That, John, is all in the rpi/sheldon config tarball I sent you by pm a > few days back, displayed in the axis gui, and also displays distance > traveled in addition to the turns IF the gcode takes advantage of it. > Otherwise the 2nd display will show a 0.000. Overshoot at 100 rpm in > high gear, not backgear, and first gear in the E400 belt position is > typically .25 turns with a 30+lb chuck mounted, but gets downright > horrible at 500 revs. Don't try that UNLESS you have equipt the backing > plate hubs with clamps to prevent unscrewing the chuck. > > > > > > --J. Ray Mitchell Jr. > > > [email protected] > > > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > If we desire respect for the law, we must first make the law respectable. > - Louis D. Brandeis > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
