G76 Pxx xx xx Qxxx Rxx Pxx # of finish passes, xx Chamfer
(00 if none),xx thread angle (included)
Qxxx Minimum pass
R Finish allowance
G76 X_ Z_ R_taper start dia + end dia /2 P_height of thread Q_ depth of
first pass F_ lead
Dave Wolfgang
CNC Programmer/Supervisor
www.hrindustries.net
----- Original Message -----
From: "Ron Fields" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, March 24, 2003 3:19 PM
Subject: RE: [mfg-smartcam] N.P.T.
> I'm confused onthe g76 commandas well can someone explain each of the
> varibles on each line ... for say a 1/4-20 thread starting at z-.300 and
> ending at -.785
> thanks
> ron
>
>
>
>
>
>
> >From: Petre Kounov <[EMAIL PROTECTED]>
> >To: "'Williams, Colin'" <[EMAIL PROTECTED]>, "Smartcam Forum
> >(E-mail)" <[EMAIL PROTECTED]>
> >Subject: RE: [mfg-smartcam] N.P.T.
> >Date: Mon, 24 Mar 2003 07:45:29 -0500
> >
> >R will increase the Pitch diameter at Z-0.68 with 0.0718 ( 2*R ).
> >Also P in the second line should not be 0 ( P is the height of the
thread).
> >
> >Hope this help,
> >
> >Peter
> >
> >-----Original Message-----
> >From: Williams, Colin [mailto:[EMAIL PROTECTED]
> >Sent: Monday, March 24, 2003 6:47 AM
> >To: Smartcam Forum (E-mail)
> >Subject: [mfg-smartcam] N.P.T.
> >
> >
> >I am trying to cut: 1 1/4 - 11.5 npt on a Dainichi 18-t Fanuc control.
Does
> >anybody know what the G76 line should look like. What should the 'R'
value
> >in the second G76 line be? The problem I am having is that the taper on
> >thread seems to be out, seems to cut bigger at the bottom end.
> >
> >example:
> >
> >G76 P10060 Q0020 R.0020
> >G76 X1.61 Z-0.68 P0000 R.0359 Q0110 F0.0869
> >
> >Any help would be appreciated.
> >Thanks
> >
> >Colin Williams
> >WABCO Freight Car Products
> >Phone: 905-561-8700 ext.227
> >Fax: 905-561-6616
> >Email: [EMAIL PROTECTED]
> >
> >
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