Re: [CAD_CAM_EDM_DRO] BobCad??

> BobCAD does all kinds of weird stuff.

Yup.

>The only solution I've found to
> prevent the machine from going all the way to the bottom is actually
> changing that first Z value manually in NCcam. You just have to check

every

> time before you run a new program. I've broken more end mills than I'de

like

> to admit due to this problem.

I ran into this one, too. Solution is to 'bring tool to clearance' before
starting the auto-cut.

> Another problem that I found is that on multiple passes sometimes BobCAD
> decides to bring the tool to clearence after every pass and then feed

(very

> slowly) back to the new Z depth. Other than being time consuming it's not

a

> big deal but the only solution for it (as far as I know) is deleting those
> lines of code or replacing those Z values for the correct ones. Very time
> consuming, especially on long programs. If anybody knows why it does this
> and how to fix it ....please let me know.

The reason is to make sure the cutter clears clamps, islands, etc. Of
course, it does it on clean circle, too. No setting that I know of to change
it.

A work-around is to drill/cut your entrance point hole to just above
z-depth, then run the roughing passes with the plunge set to a higher speed.
You can then ramp to your start point and use a finish toolpath. (Or the
same one, as you see fit) Run the finishing pass with the plunge speed set
slower and automatic-roughing off.

HTH

- Keith


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