8.5. - pv select pen velocity
controls the drawing speed on the pen plotter.
The quality of the
lines on the plotter depends on the drawing speed and acceleration
of the pen.
You may sometimes want to draw plots quickly, at the expense
of well-inked lines, or you may want to slow the pen for better quality
lines.
This command has no effect on graphics filters.
pv velocity
or
pv -1
With no parameters, the current pen velocity is printed and you are
prompted for a new value.
The numeric velocity parameter you select is sent literally to the
pen plotter.
Positive values give the drawing speed in centimeters
per second.
A negative value generally selects the maximum velocity
of the pen plotter, but at higher pen acceleration.
The default value
for pen velocity is 10 centimeters per second.
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