Re: [CAD_CAM_EDM_DRO] rE:Re:RE: programming by hand

I'd have to agree about those problems with interchange formats as well as
CAD drawings having incorrect dimensions!

I tried sending a CAD drawing in several formats....dxf, .dwg, and .stl.
The customer said he'd be able to open all of them. He couldn't open any
and finally I had to resort to sending jpg files!

As for the dimensioning, a lot of the errors crop up due to not being able
to see the entire drawing at one time as I've mentioned before. Also,
really experienced draftspersons can draw faster using a drawing board for
the same reason.

Also, for a really simple drawing, I can have it drawn (so can you if it's
simple enuf to be done with a sketch) before my drawing program even
finishes loading.

Smoke

> Sometimes drawings in the form of CAD files can be a real hassle.
>First off, you have to be able to read them. Pro Engineer, IGES,
>Catia, different revs of Autocad dwg & dxf, and of course the
>engineers who forget and send a file in some strange format internal
>to their particular CAD system. I usually figure it'll take a couple
>of tries and at least an hour to get an electronic file. I think the
>file interchange problem is one reason we'll be using paper for years
>to come.
>
> Another thing about electronic files..there isn't any guarantee
>they'll anymore right than a paper drawing. Just had one today, the
>dimension on the drawing said one thing and the inherent dimension in
>the drawing file was different?? Every see CAD files where the
>entities that would represent a tool path are not connected? They
>appear connected on the screen and on paper, but they might have
>larger end gaps than the CAM program can automatically compensate
>for. I see that one all the time.
>
> Just some thoughts...
>
>thanks,
>
>Doug
>
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>
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