BobCAD cut repetition, was Re: [CAD_CAM_EDM_DRO] BobCAD users

> I ran in to a similar problem last night. This time it wasn't a pocket
> function, just an "auto cut" that went out of control and repeated some 20
> times (the previous 3 cuts worked fine).
>
> No explanation or fix that I know of other than manually deleting extra
> code - a real pain.

I think you'll find it is relatively easy to fix it when it happens by
'undo'-ing the NC code just generated, auto-cut again, but manually select
the ending entity.

If you are using 'cut-all' or press "]" to auto-complete your path, BobCAD
needs a small gap or overlap (preferred) at the point on the drawn toolpath
where the finish pass comes around to the start. Have to do that manually if
it does the loop trick. Changing the end entity to a different color can
help with the 'picking'. Really only need to do this when your path ends
with a small, hard to pick entity.

Quick fix is to fillet the two entities where the path enters the O.S. loop.
A quick lead in/out is to offset the entity that "T's into the finish pass.
Offset by the amount of overlap you need, then fillet them to the outer loop
entities. (fillet tool extends entities automatically, as long as they
intersect somewhere in the same plane)

BobCAD runs over a previous path when your CAD chain has no end (a node with
no entities within chain gap tolerance distance), and also when you have an
doubled entity (one on top of another, a common problem for imported IGES
files, accidentally unblanked layers, etc) In the first case BobCAD doesn't
realize where the chain ends when it meets itself again. (No 'tag' for the
used entities to avoid repeats.) In the second, the draftsman didn't realize
the multiple entities existed.

- Keith

After using BobCAD v17 a number of years...:)
N00 ;(A little redundant on the last paragraph there! Ahh, its starting to
control my mind!)
N10 ;(A little redundant on the last paragraph there! Ahh, its starting to
control my mind!)
N20 ;(A little redundant on the last paragraph there! Ahh, its starting to
control my mind!)
N30 ;(A little redundant on the last paragraph there! Ahh, its starting to
control my mind!)
N40 ;(A little redundant on the last paragraph there! Ahh, its starting to
control my mind!)
N50 ;(A little redundant on the last paragraph there! Ahh, its starting to
control my mind!)
....
<UNDO>



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