PRINCIPLES OF DRAFTING AND SHOP DRAWING - 0D1641 - LESSON 1/PE 1
The coordinate system is a dimensioning system based on the mathematical x-y
It is usually only used to dimension an object that
contains a great many holes, for example, an electrical chassis.
Phantom lines show the possible alternate positions of moving parts.
A sectional view allows you to look inside an object shown on a shop drawing.
The two types of production drawings are:
(1) Assembly drawings show several objects joined together. An assembly drawing
must include all information needed by the craftsman to correctly assemble
the parts. They do not usually include specific object dimensions which are
necessary for assembly.
(2) Detail drawings are used by craftsman to produce a finished object. They are
a set of instructions that should include all information necessary for the
complete and accurate manufacture of the object.