Using This Chart
Because all work is done in AutoCAD models should be at 1:1, text and labels must be adjusted to appropiate sizes based on the scale at which they will be printed
For example: if a detail drawing will be printed at 3″=1′-0″, and the desired height of the text when printed is 1/8″, the text in the model must be set to 0.5″. If the same drawing will be printed at 1/4″=1′-0″, and that the text also needs to be 1/8″ high, any text related to 1/4″ scale output would be set to 6″ in the model. Many clients, including governement agencies, will require a minimum text size for legibility.
Using Paper Space Scales (XP)
The XP scale is the relationship between the desired plotted scale and the sheet of paper on which it will be plotted. With hand drafting, one would typically use an architect’s or engineer’s scale to assist in correctly making a drawing “to scale”. On such a scale, if using 1/4″= 1′-0″, 1′ is shown on the scale as 1/4″ in lenght; 2′ are shown as 1/2″, and so on. In reality, the scale. has already done much of the calculation necessary to draw at desired scale. To describe this process accuratly, one could say that, for the drawing to fit on a certain sheet of paper, the drawing has been made at 1/48 its full scale (if 1/4″=12″,1/4×1/12=X, therefore X=1/48).
In AutoCAD the process is much the same. To set the scale of a viewport while inside the viewport (ms) in paper space, zoom to 1/48XP (also equal to 0.02083XP). XP literaly means “times paper space.” This action willzoom the viewport window to 1/4=1′-0″ in relation to the paper space title block, wich is printed at 1:1.
Materials Structures and Standards, Rockport Inc. – Google Slides and Images