HP 7470A Interfacing And Programming Manual page 53
Graphics plotter
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Also See for 7470A:
- Operator's manual (41 pages) ,
- Interfacing and programming manual (114 pages) ,
- Service manual (141 pages)
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DES|RED
CIRCLE
CHORD
CHORD ANGLE
The most useful chord angle Values range from 0 to 180; where 0
produces the smoothest circle and larger numbers progressively reduce
the number of chords used. Values from 180 to 360 work just the
opposite; i.e., larger numbers progressively increase the number of
chords used and 360 produces the smoothest circle. This pattern follows
modulo 360 through the permitted range of #32 768 to 432 767. Specify
ing out—of-range p arameters sets error 3 and the command is ignored.
The following strings of HP-GL instructions, when sent to the plotter
using your computer's output statements, show the effect of different
chord angles.
"IH;SP1;IP2B50,1325,?E50,5325;"
~sc—1oo,1oo,—1oo,1oo;"
"PH-50,40;CI30,45;"
"' F'Fl50,40; CIBO, 30; "
"PH—50,-40;CI30,15;"
"PH5o,—4o;cI3o,5;"
CONTROLLING THE PEN AND PLOTTING 3-13
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