Re: [CAD_CAM_EDM_DRO] Excess material

Hi PJH,

The way Visual Mill adresses this (and probably other CAM softaware) is
that you define the size of your "stock" which is your square (or other
shape) block of material. You then specify where your part is
positioned within the stock. Starting with roughing and progressing to
finishing cuts, VM then calculates all of the moves that are required to
remove the unwanted material while observing the feed rates and step
rate you specify (such as step across say 20% of tool diameter and say
15% of tool dia down) you can be as gentle or agressive as you want. To
address the issue of fixtures, you have to define "out of bounds"
regions that the tool cannot enter. This is where your tool clamps etc
are located.

I almost always set my 0,0,0 point as the top,back, right most corner of
my stock. Being consistent helps beduce "brain freeze" and reduces tool
crashes etc.

Hope this helps.

Cheers, Peter

P. J. Hicks wrote:

>Hello all,
>
>I am learning to use Dolphin and Master5 on a Sherline. Have not really made any parts yet; been cutting air.
>
>Let's say you have a square block of material and want a part machined from the central area. You create the drawing, designate the contour(s) etc in the CAD section. You then invoke the CAM program and generate the Gcode. This code causes the cutter to follow the contour of the desired part. In many or even most cases there is a lot of material outside the contour that is in way of the cutter and interferers with the cutter's path. In other cases the code might ask for an increasing depth or some such that would overstress the cutter or setup. How is this handled? I am aware of the multiple cut/pass settings but wonder about the scrap material interfereance. Thanks,
>PJH
>
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