Chapter 2 Architectural Drafting Equipment

2 Links for Chapter 2 Drafting Supplies Drafting Instruments Drafting Machines

3 Drafting Supplies Mechanical Pencils - The lead is manually inserted and sharpened as needed Automatic Pencils - The lead advances as button or tip is pushed Lead Grades - Depends on the type of line –Thick Lines - 2H to F –Thin Lines - 4H to H

4 Drafting Supplies Pencil Motion - Keep pencil tilted at 45º with the direction of travel –Provide even pressure to create sharp crisp lines –Slowly Rotate the mechanical pencil as the line is drawn –Practice this technique as often as possible

5 Drafting Supplies Technical Pens - Used to create inked lines Erasers - Use the correct eraser for the job –Do not press too hard to rip the material –Erasing shields protect good lines –Use a dust brush to remove the eraser particles

6 Drafting Instruments Compasses - Used to draw circles and arcs –Drop-bow is used for small circles –Center-wheel is used by professional drafters –Beam is used for large arcs or circles Keep the compass needle sharp and the lead point sharpened like a chisel point

7 Drafting Instruments Dividers - Used to transfer dimensions or divide distances Parallel Bar - Slides up and down the drafting board by cables mounted on pulleys Triangles - Two standard types –30º-60º-90º is known as 30º-60º triangle –45º-45º-90º is known as 45º triangle

8 Drafting Instruments Templates - A plastic sheet that contains standard symbols used for tracing –Be sure the scale matches your drawing –Keep both sides clean Irregular Curves - There is no constant radii and is commonly called a French curve

9 Drafting Machines Arm Drafting Machine - The arm clamps to the table and the head can rotate to a variety of angles with different scales attached to it Track Drafting Machine - The traversing arm moves left and right across the table and the head can also lock and pivot

The End!! Questions??