Re: [CAD_CAM_EDM_DRO] Inverse of G-code

Another thing that comes to my mind is to use the controller's option to
reverse the direction of z-axis. I am not too familiar with other
controllers but it is very easy to do with TurboCNC. For the wall thickness
problem, simply use an oversized cutter and you don't have to change a
single line of your code.

Regards,
Zafar

----- Original Message -----
From: "W. P. McGown" <bmcgown@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Friday, September 19, 2003 9:01 PM
Subject: Re: [CAD_CAM_EDM_DRO] Inverse of G-code


> Thanks to all for suggestions. For those interested in such things the
one
> by Carlos seems the best for this project -- use only one mold/die and a
> urethane pressure pad.
>
> Alan's suggestion of going back to the CAD package and doing the tool
paths
> there is probably the one I will use if the urethane pressure pad does not
> work out.
>
> The WORST POSSIBLE solution is to hand code it!! The little example given
> below took over 30 minutes!! (So I am a code wimp! ;-) ) and the
> design/mold I am working with is much more complicated!
>
> For those curious here is a sample that I did to get the feel for the job.
> The first G-code cuts the positive mold. The second cuts the negative
> negative mold.
>
> {program1 start}
> ;---------------------------------------
> G00 Z.1
> G00 X.5 Y1
> G00 Z-.05
> G01 Y.5
> G02 X1 Y.5 R.25
> G01 Y.375
> G03 X.5 Y.375 R.25
> G01 X.375
> G01 Y1
> G00 Z.1
> G00 X0 Y0
> M02
>
> And now the other one while maintaining a .125" clearance around the
> previous design:
>
> {program2 start}
> ;---------------------------------------
> G00 X.125 Y1.1875
> G01 Z-.05
> G01 Y.1875
> G01 X.75
> G01 Y.375
> G01 Y.1875
> G01 X1.25
> G01 Y.5
> G03 X.75 Y1 R.5
> G01 Y1.1875
> G01 X.125
> G00 Z.1
> {stuff deleted that cuts around the outside of this path and the next 3 }
>
>
> Thanks again for all the help/suggestions.
>
> Bill
>
>
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