In today's engineering environment "scales" (the triangular plastic or wood instruments) are rarely used. However setting proper units of measurement and plotting to scale has not changed since computer aided drafting has come on the scene. List examples of how to set units and dimension variables for imperial and metric drawings, precision, text height, arrow sizes, etc.

reasons:

1. A CAD system may not

always be available.

2. Not all companies can or

will supply CAD systems to

every drafter.

3. Field drawings and instructional sketches must be completed in

environments hostile to computers.

4. Creative design in many areas is still done in pencil.

5. There may be times when the CAD system cannot create a

specific type of detail. It would be expedient to make a print of

your drawing and complete the detail with manual drafting

instruments.

Whether a drawing is prepared as a pencil sketch, inked instrument drawing, or computer-generated hard copy (Fig. 2-2), the final

output must be orthographically correct, dimensionally accurate,

symbologically true, and easily readablereasons:

1. A CAD system may not

always be available.

2. Not all companies can or

will supply CAD systems to

every drafter.

3. Field drawings and instructional sketches must be completed in

environments hostile to computers.

4. Creative design in many areas is still done in pencil.

5. There may be times when the CAD system cannot create a

specific type of detail. It would be expedient to make a print of

your drawing and complete the detail with manual drafting

instruments.

Whether a drawing is prepared as a pencil sketch, inked instrument drawing, or computer-generated hard copy (Fig. 2-2), the final

output must be orthographically correct, dimensionally accurate,

symbologically true, and easily readablereasons:

1. A CAD system may not

always be available.

2. Not all companies can or

will supply CAD systems to

every drafter.

3. Field drawings and instructional sketches must be completed in

environments hostile to computers.

4. Creative design in many areas is still done in pencil.

5. There may be times when the CAD system cannot create a

specific type of detail. It would be expedient to make a print of

your drawing and complete the detail with manual drafting

instruments.

Whether a drawing is prepared as a pencil sketch, inked instrument drawing, or computer-generated hard copy (Fig. 2-2), the final

output must be orthographically correct, dimensionally accurate,

symbologically true, and easily readable