Thanks Jeff, I get the cue. I just tried with tool = 0.5 and it worked
perfect. I did not understand why it was able to do it in inverted, but with
your explanation its obvious!

Ricardo

On Tue, Sep 30, 2008 at 6:46 PM, Jeff Epler <[EMAIL PROTECTED]> wrote:

> I think that image-to-gcode may be working as designed, though I
> understand that it's not giving the results you want.
>
> Your screenshot shows that you specified a tool diameter of 2mm and
> a pixel size of 0.5mm.  That means that the tool covers 4 pixels.
> But in your antialiased images, the blackest parts are much less than 4
> pixels wide, so image-to-gcode tries to figure out exactly how far in
> the tool can go without cutting away any of the material you wanted to
> remain.
>
> (and because of antialiasing and jpeg compression, few of the pixels are
> actually totally black)
>
> There's not currently a way to tell image-to-gcode that you'd rather
> err on the side of milling away more material.
>
> I got results that may be closer to what you want by:
>  * opening the image in gimp, choosing (layers>)colors>threshhold, and
>   setting the low value to about 190.
>
>  * then set the tool size to the same as the pixel size in
>   image-to-gcode
>
> Jeff
>
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