Sprocket

Descriptive Geometry Notes

Manipulating(rotate) picture planes(surfaces) in order to identify:

• TSize
• TShape
• TLength
• Tangle
• Intersection
• Distances

True length lines

• If a line is parrallel to a fold line in one view, it is true length in the next

Point View

• First find TL o fline
• Create fold line perpindicular to the TL line

PO- point
PDMODE=96
PDsize=.1

TSS

• First find TL of one line
• Create a fold line perpindicular to the TL line to get the edge view(EV) of the surface
• Create a foldline parallel to edge view

Addaline

• Draw a line parrallel to F1 from 1 point to the line you want TL of
• Project the point where it hits the line you want TL of to the next view on the same line
• Connect that point to the point you started with wich gives you a TL line
• create FL perpindicular to TL which will give you your EV including a point
• Create FL parrallel to EV which will give you your TSS surface