[Bart]

How did the video go clifrod?

Originally Posted by cliffrod

Bart, the methods I will demonstrate this Friday at Redneck Roundup ( & then post to video for all here asap) are what I use to enlarge 2D patterns. No computers, significant expense or typical limiting things like plotter size, just the time to do it. Very Simple and very accurate. Detail level is dependent upon how many points are replicated.

If you are enlarging by a whole integer multiple (3x, 4x, 10x) it is somewhat more simple because you only need a straight line and calipers to calculate and capture new dimensions to apply to the pattern. That is part of what I'll demonstrate as well.

The problem often encountered if that accuracy OR inaccuracy is also multiplied by the same factor. Little models/patterns have to be perfectly accurate to enlarge in big steps. I was trained to enlarge by a factor <2 if possible each time, correcting as needed before the next enlargement unless the model/pattern is really good. This is not always practical, but this is still SOP for some of the best foundry and portrait sculptors with whom I work.

These methods, which work very easily for 2D enlargement, were actually taught to me to use for accurate 3D enlargement. That is not as simple, well beyond the scope of a brief workshop and probably not as relevant here. I realize many here will not use these methods in lieu of modern technology. Even so, they provide a means to easily double check the accuracy of work, whether 2D or 3D.