Re: [CAD_CAM_EDM_DRO] Helical interp was Re: Cirular interpolation

----- Original Message -----
From: "ballendo" <ballendo@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, January 31, 2002 12:01 AM
Subject: [CAD_CAM_EDM_DRO] Helical interp was Re: Cirular interpolation


> Tony,
>
> John S is right; more info would be helpful...
>
> Most controls capable of helical interpolation implement it simply:
>
> Just program the circle and ADD a linear "departure" value.
>
> So in the XY plane, a helical move would be: G02 x0y0 i2.25 z-.125
>
> (assumes cutter comp. adjust comp or coords for correct thread depth)
> Arc-in and arc out of the move.(depending on the precision needed,
> these moves may need to be helical as well).
>
> Adjust x,y and i (or J) to suit your specifics. If your threadmill
> has multiple threads, this should do it; otherwise make additional
> helical moves to get enough threads.
>
> Hope this helps.
>
> Ballendo
>
> --- In CAD_CAM_EDM_DRO@y..., "Tony Dickson" <antson@c...> wrote:
> > Folks,
> > I'm having a heck of a time trying to get my milling machine
> thread a 4.500" hole with an 8 tpi thread in it. Can anyone tell me
> if Bobcad, Vectorcad or Dolphin can generate code for this
> particular operation. I think it might also be called helical
> interpolation, I'm not sure.
> > I got in on the end of the "thread milling" post a while back, I
> hope I'm not repeating the same question.
> >
> > Thanks,
> > Tony
> >
> >
> > [Non-text portions of this message have been removed]
>
>
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