Tham khảo tài liệu 'beginning autocad 2002 episode 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lengthen align and stretch 203 Stretch example 1 Open your WORKDRG and refer to Fig. 2 a erase the centre lines b add hatching - own selection c linear dimension the two lines with menu bar selection 3 Activate the STRETCH command and a enter C R - crossing option b first corner pick a point P1 c opposite corner pick a point P2 then right-click d base point pick any suitable point e second point enter @15 0 R 4 Repeat the STRETCH command and a activate the crossing option b pick a point P3 for the first corner c pick a point P4 for the opposite corner d pick a suitable base point e enter @0 -15 as the second point 5 The component and dimensions will be stretched with the entered values. Figure Using the STRETCH command. 204 Beginning AutoCAD 2002 Stretch activity Refer to Fig. and 1 Draw the original component as shown adding the four dimensions. 2 Using the STRETCH command only produce the modified component. 3 There is no need to save this activity. Summary 1 Lengthen will increase decrease the length of lines arcs and polylines. There are several options available. 2 Dimensions are not lengthened with the command. 3 Align is a powerful command which combines move and rotate into one operation. The order of selecting points is important. 4 Stretch can be used with lines polylines and arcs. It does not affect circles. 5 Dimensions and hatching are stretched due to association. Chia ier 31 Obtaining information from a drawing Drawings contain information which may be useful to the user . coordinate data distances between points area of shapes etc. We will investigate how this information can be obtained so 1 Open C BEGIN USEREX and refer to Fig. . 2 Draw a circle centre at 190 140 and radius 30. 3 Activate the Inquiry toolbar. Figure Obtaining drawing .
