Friday, February 8, 2008

Dealing with an AutoCAD file that has not been scaled: Improper Scale in a DWG!

Have you ever been handed a drawing done by someone else? Have you ever been handed a drawing done by someone else who doesn't seem to have the faintest clue about layouts, scales, or plotting? Where I work, we get handed DWG files from many different consultants. Each of them is inept or dinosaurish in some way. One difficult problem that I frequently encounter is CAD documents that are not properly scaled or dimensioned and won't print to a standard layout!

Assuming you don't know the size of the paper it was originally printed on,

One way to overcome this is to follow this proceedure:

1) find a feature on the document that has a known length and measure it using the distance tool (di is the short cut)
2) divide this length by the scale
3) this number is to be used when you plot
4) Select plot, plot window (drag a box over the entire drawing), choose a ratio for scale (eg. 1 mm = 10 mm), then
5) Hopefully plotting should work!