RE: [CAD_CAM_EDM_DRO] Re: tangential cutter software

HI all! last week i did a bunch of web searching for tangential vs drag
knife (thank you google), the only thing the articles and such could agree
on was that if you want to cut smaller then 1/16" letters (1.6mm aprox) you
need tangengial... but for anything else, the drag knife (properly
sharpened) is just fine... NOW, i have no personaly experience, this is just
what i read, can anyone back this up or prove it wrong?
i also found a drag knife attachment..
http://www.aeronautauto.com/pages/consumables.html#Anchor3
(you will probably have to cut and paste the broken link above)
(its at the bottom of the page---cuts under its own weight?)
does anyone have experience with this sort of thing?
---thanks!---Dave L.

-----Original Message-----
From: dougrasmussen@... [mailto:dougrasmussen@...]
Sent: Thursday, November 29, 2001 10:30 PM
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: [CAD_CAM_EDM_DRO] Re: tangential cutter software


Peter,

Don't know if this will work for your application in 2mm cardboard,
but I've seen vinyl cutting machines which use a "drag" knife. The
cutterhead is free to rotate and the cutting edge is behind center so
the cutter will follow (in a tangential path or close to it) as the
head traverses the pattern. Have you looked at that style of knife?
Very simple compared to a C axis orientation setup.

Doug

--- In CAD_CAM_EDM_DRO@y..., p_uhd@f... wrote:
> I am making a machine to cut 2mm thick cardboard for architectural
> models and fabric cutting. I am looking for CAM software for this
> that will operate a tangential cutter. My arrangement is with a
xyzc
> machine. The c being the rotation of the knife. The z can be either
> stepper or solenoid controlled.
>
> The only software I have found so far that will automatically output
> c as tangential to a drawn line is Dancam. Even still I don't know
> how
> to obtain dancam as his website dosen't seem to have it available.
>
> I do have a small budget available for the software and would
greatly
> appreciate any leads on suitable programs. I already use Autocad
for
> the cad so it is the cam side of the equation that I am searching
high
> and low for.
>
> Also if anyone has built a similar machine or is planning to I
would
> be very happy to hear from you.
>
> With thanks,
>
> Peter Uhd


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