COMPUTER AIDED DRAWING Computer Aided Drawing CAD is

COMPUTER AIDED DRAWING Computer Aided Drawing (CAD) is where we produce our orthographic and 3 D drawings using a computer software package. CAD has many advantages and disadvantages over traditional drawing on a drawing board with a pencil. Below is an example of a CAD drawing. This graphic shows an example of a 3 D drawing which was created as a line drawing and then rendered.

COMPUTER AIDED DRAWING • Drawings are more Accurate • Ease of modification / edit drawings • Standardisation of drawings • Drawings can be sent over large distances using e-mail. • Ability to use a library of commonly used shapes/drawings.

COMPUTER AIDED DRAWING • Initial cost of hardware and software • Need to re-train staff • Computers may crash and drawings are lost • Security of files; files may be hacked • Need to update software

COMPUTER AIDED DRAWING These commands draw arcs, boxes, circles and ellipses quickly and accurately. Arc Common CAD Commands Circle before after before Ellipse Box before after

COMPUTER AIDED DRAWING Common CAD Commands Text before This command allows to add text or writing to a CAD drawing For example adding the labels to views. after

COMPUTER AIDED DRAWING Common CAD Commands Fillet before after Chamfer before after The fillet and chamfer are editing commands which allow you to create angled (chamfered) and rounded (filleted) corners.

COMPUTER AIDED DRAWING Common CAD Commands Trim/Break before The trim/break command allows to remove part of a line or object. after

COMPUTER AIDED DRAWING Common CAD Commands Copy before after The copy command allows you to create duplicates of an drawing or image without having to draw the image each time.

COMPUTER AIDED DRAWING Common CAD Commands Mirror before axis after The mirror command creates a mirror image copy of an object about a specified axis.

COMPUTER AIDED DRAWING Common CAD Commands Zoom/Scale before The zoom/scale command allows the user to reduce or enlarge the size of an object. after

COMPUTER AIDED DRAWING Common CAD Commands Rectangular Array before The array commands creates multiple copies of an object in circular or rectangular arrangements. after Polar Array before after

COMPUTER AIDED DRAWING Common CAD Commands Hatch/Pattern Fill before after The hatch/pattern fill command inserts a range of line patterns to specified areas within a drawing/object.

COMPUTER AIDED DRAWING Common CAD Commands Delete before The delete command as the name suggests, removes a line or selected object. after

COMPUTER AIDED DRAWING Common CAD Commands rotate before The rotate command allows you to turn an object or drawing through a specified angle. after

COMPUTER AIDED DRAWING