422 Machine Drawing
dharm
d:\N-Design\Des21-1.pm5
Command: PLINE
Front point: 15, 25 (starting point). Once the starting point is selected, the computer will
indicate current line width; 0,0 (default value)
When entered, the prompt responds:
Arc/Close/Half width/Length/Undo/Widt/:
By choosing (Fig. 21.22):
(8, 6)
(4, 5)
(4, 5)
Arc
(8, 6)
(11, 5)
Close (10, 3)
(4, 5)
(8, 6)
Half-width
Existing line
New line (5 units)
(4, 5) (6, 5)
(4, 5)
(8, 6)
(9, 3) (4, 5)
(8, 6)
(4, 5) (8, 5)
Length Undo
w = 1 unit w = 4 units
Fig. 21.22
Arc — one can draw an arc with proper choice or selection
Close — from the present position, the line joins with the starting point
Half width — in case the starting width is chosen earlier; from this point, the width
of the line will be half of it
Length — length of the line may be given or co-ordinates may be given to draw
the line
Undo — the previous operation is reversed
Width — one can specify the width at this point and also have a tapered line
drawn by suitably instructing both starting width and ending width
— (default) by just entering, PLINE stops at the above point
NOTE PLINE may be used similar to LINE command with added advantages.
21.18 OFFSET
Features: 1. Creates an object parallel to and at a specified distance
2. Draw parallel lines, concentric circles, arcs, etc (Fig. 21.23).
The response of the computer to the command:
Command: OFFSET
Offset distance or through :
By choosing the option offset distance.
