Page 142 - Engineering drawing from first principles using AutoCAD

Three-dimensional projection exercises 135

Figure 8.13

marked using the DOUGHNUT option, and a hole diameter of O.Smm and outside
diameter of 1.5 mm are suitable. When the two intersecting circles are drawn, they can
be exactly transferred if their centres are on SNAP positions.
Commence with a high ZOOM setting and the front view on screen. Use the Circle menu
and choose Centre, Radius. Draw the circle from the centre line to the slope of the cone
and follow this immediately with the same circle on the plan view, which will be
accurate. Repeat the procedure for the other pair of circles. Having established points