RE: [CAD_CAM_EDM_DRO] Re: Re: can you scale a part

Fred:

In the Dec 1998 issue of MainLine Modeler, there's an article on making
model RR steam locomotive drivers. The technique presented uses a lost wax
casting technique. The person writing the article claims that about a 4%
shrinkage is expected with this technique, and that he routinely draws his
parts to scale, and then uses the program's scaling capabilities to enlarge
the drawing by the expected shrinkage. So, there's possibly another reason
to scale your drawing.

-- Carol & Jerry Jankura
Strongsville, Ohio
So many toys, so little time....


|Please elaborate on this gem of wisdom. I always thought that the
|whole purpose of vector based Cad drawings (forms like DXF, IGES,
|and DWG) was that they WERE scalable, now you forbid it?
|
|A lot of the people using CAD in this group are making "SCALE
|MODELS". Are you saying that if one has a full sized set of Cad
|drawings of say a locomotive, that he should NOT scale them to
|make an HO scale model?