Re: [CAD_CAM_EDM_DRO] Re: Cirular interpolation

on 2002-01-31 16:28:27 UTC

Doug,
Thanks a million for the help and the tips. I appriciate it.

Thanks again,
Tony

----- Original Message -----
From: "doug98105" <dougrasmussen@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Thursday, January 31, 2002 9:53 AM
Subject: [CAD_CAM_EDM_DRO] Re: Cirular interpolation

> Tony,
>
> Does your machine directly support helical interpolation? If so,
> then it's easy (see your controller manual). If not, then there are
> otherways to accomplish the task.
>
> Provided your machine will move simultaneously in X,Y,Z, thread
> milling can be done by creating a toolpath made up of short straight
> line (linear interpolation) segments. Years ago my only mill
> wouldn't helical interpolate so I used a spreadsheet to develop the
> toolpath made up of the short segments. Keep the segment length
> relatively short and it's impossible to tell the difference between
> this method and the helical method.
>
> Most of the time I used a right hand lathe threading bar as my thread
> mill. Start at the bottom of the hole, climb mill up out of the hole
> rather than milling into the hole. Better finish with climb milling,
> plus you aren't milling into a hole filled with chips. For threads
> as coarse as 8tpi, you may find a roughing with a finish pass gives
> best results.
>
> Doug
>
>
>
>
> --- 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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