Re: [CAD_CAM_EDM_DRO] Re: TANGENTIAL?

Dave,
Looks similar to most.......

Here are some more options: http://www.signcatalog.com/Blades_Holders.htm

I have the $75 one listed for Vinyl Express machines. It is adjustable for depth/distance blade hangs out and uses the very common Roland blade. There are some less expensive ones on the page as
well but not sure how good they are.

Chris L

Dave Lantz wrote:

> hello all, im back again. I did find a swivel knife that is supposed to cut
> under its own wieght..
> its at:
>
> http://www.aeronautauto.com/pages/consumables.html
>
> down at the bottom, does anyone have experience with this knife? it claims
> to work in most pen plotters...
> it is listed as 105... let me know if anyone has tried it. im thinking of
> picking up an old flatbed plotter and putting it in it!---Dave L.
>
> -----Original Message-----
> From: ballendo [mailto:ballendo@...]
> Sent: Monday, April 29, 2002 1:58 AM
> To: CAD_CAM_EDM_DRO@yahoogroups.com
> Subject: [CAD_CAM_EDM_DRO] Re: TANGENTIAL?
>
> Hello,
>
> Many controls "know" which direction they are "headed".
>
> The arcTANgent gives this, even in "swept" arc algorithms... Add some
> boundary checks and initialisation code and you can always know a
> direction delta angle. This can then be used for tangential axis
> moves and trajectory planning.
>
> The EMC 274NGC interpreter contains a bit of code to deal with this.
>
> FWIW, the free DanCAD3d download (www.metalworking.com) contains the
> program DanPLOT, which supports the C axis required for tangential
> cutting. I have to agree with Chris, that for all but small
> letters/designs, the dragknife works nearly as well. But I don't know
> where he gets them with holder for 100 bucks!
>
> Hope this helps,
>
> Ballendo
>
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