Re: [Emc-users] Problem with tapping
The second and third g33.1 lines don't look kosher to me. If g33.1 is a modal G call, after the first g33.1, it should just be a series of X/Y positioning moves Dirty example of g84 on fanuc: G0 g90 g54 g95 x0 y0 (POSITION, UNIT PER REV FEED) G43 h1 z2. M29 S1000 (ENABLE RIGID TAP, SET RPM) G84 G99 Z-1. F0.0625 R.1 X1. Y1. X2. Y.5 G80 G91 G28 Z0 M30 Phil T. The Feral Engineer Check out my LinuxCNC tutorials, machine builds and other antics at www.youtube.com/c/theferalengineer On Mon, May 24, 2021, 5:29 PM Ed wrote: > Following is a snippet of a program using G33.1 > > The first hole is tapped correctly then all the rest get switched X and > Z. It will move to X -.8 then back then to x-.25 and repeat for the rest > whether there is a G33.1 on the line or not. > > > Using Version 2.7.14 > > > > g53g0z0 > m6t25 > g43h25 > m3s500 > g0x-.25y0z.2 > g33.1k.0556z-.8 > g33.1x-1k.0556 > g33.1x-1.625k.0556 > x-2.375k.0556 > x-3k.0556 > x-3.75k.0556 > x-4.375k.0556 > x-5.125k.0556 > m5 > > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Problem with tapping
On 05/24/2021 04:26 PM, Ed wrote: Following is a snippet of a program using G33.1 The first hole is tapped correctly then all the rest get switched X and Z. It will move to X -.8 then back then to x-.25 and repeat for the rest whether there is a G33.1 on the line or not. Using Version 2.7.14 g53g0z0 m6t25 g43h25 m3s500 g0x-.25y0z.2 g33.1k.0556z-.8 g33.1x-1k.0556 g33.1x-1.625k.0556 x-2.375k.0556 x-3k.0556 x-3.75k.0556 x-4.375k.0556 x-5.125k.0556 m5 The first G33.1 looks right, it has a K to specify the thread pitch and a Z to specify how deep. The second and third do not specify a Z. The quick ref ( http://linuxcnc.org/docs/html/gcode/g-code.html#gcode:g33.1 ) has this warning: For Z only tapping preposition the XY location prior to calling G33.1 and only use a Z word in the G33.1. If the coordinates specified are not the current coordinates when calling G33.1 for tapping the move will not be along the Z axis but will be a coordinated, spindle-synchronized move from the current location to the location specified and back. Is this the problem you are seeing? Jon ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Problem with tapping
On Mon, 24 May 2021 at 22:29, Ed wrote: > The first hole is tapped correctly then all the rest get switched X and > Z. I don't think that that is what happens. (I was a little surprised by this myself recently) G33.1 basically works in any direction. if you program a pure X move then it will "tap" sideways. It isn't a canned cycle like G85 and friends. it is a more complex version of G33, which is spindle-synched motion in any direction. (this can be useful, I have used it to thread in compound directions) You need to re-cast your code as a sequence of G0 positioning moves and a G33.1 move to a specified Z. -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1912 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Problem with tapping
Following is a snippet of a program using G33.1 The first hole is tapped correctly then all the rest get switched X and Z. It will move to X -.8 then back then to x-.25 and repeat for the rest whether there is a G33.1 on the line or not. Using Version 2.7.14 g53g0z0 m6t25 g43h25 m3s500 g0x-.25y0z.2 g33.1k.0556z-.8 g33.1x-1k.0556 g33.1x-1.625k.0556 x-2.375k.0556 x-3k.0556 x-3.75k.0556 x-4.375k.0556 x-5.125k.0556 m5 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
