On Monday 09 August 2021 20:16:50 andrew beck wrote:

> Quick answer before I go out.
>
> Peck Tapping breaks the chip otherwise they can break taps.  Eg tap m6
> down 30mm you might break it.  But do it in two bites you should be
> sweet and rpm is 400.
>
> If I somehow work out how to know if g33.1 (rigid Tapping is active)
> and export that to a python script. Then I can change my spindle
> acceralation briefly and tap at 1000rpm with almost no over shoot.  
> The spindle Vfd can reverse in 120degrees currently at 1500rpm

Be carefull with that John, else you may get following errors because the 
Z can't keep up.

> But that will take some coding I think.
>
> I can change acceralation on the fly with custom m codes and halcmd
> currently but need to to set it up to automatically change back and
> forth if rigid Tapping is active
>
> On Tue, Aug 10, 2021, 11:50 AM John Dammeyer <jo...@autoartisans.com> 
wrote:
> > Impressive.   Lots of questions.
> >
> > Why did you make two passes?  Just because?  Seems like the spirals
> > could get caught and muck up the threads on the second pass.
> >
> > Was this steel or aluminium?
> >
> > What type of coolant are you using?
> >
> > Do you have an oil separator disk or belt and aeration to keep it
> > from getting smelly?
> >
> > I did my 10-32 tapping at 150 RPM.  Still scary how fast it moves up
> > and down.
> >
> > John
> >
> > > -----Original Message-----
> > > From: andrew beck [mailto:andrewbeck0...@gmail.com]
> > > Sent: August-09-21 1:20 PM
> > > To: Enhanced Machine Controller (EMC)
> > > Subject: [Emc-users] Just a little rigid Tapping Clip. With peck
> > > tapping
> > >
> > > M14x2 spiral flute tap.
> > >
> > > Rpm 400
> > >
> > > Pecking 15mm.total depth 35
> > >
> > > I can turn main power off at the wall and it will re line up with
> > > tapped threads so long as I leave it in the vice.
> > >
> > > That's so cool.  Love linuxcnc
> > >
> > > Might try a m20 tap sometime.  I have 7.5kw spindle.  Be
> > > interesting to
> >
> > see
> >
> > > if it can push it lol
> > >
> > > https://youtu.be/6QX2Qm3I2Ak
> > >
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> >
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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>


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