HP PCL/PJL reference (PCL 5 Printer Language) - Technical Reference Manual Part II

EN WG, Fill Wedge 21-47
z Sweep Angle — Specifies in degrees the angle through which
the arc is drawn. A positive angle draws the angle in the positive
direction (angle of rotation - +X-axis to the +Y-axis); a negative
angle draws the angle in the negative direction (+X-axis to the –
Y-axis). (Note, the relation of the +X-axis to the +Y-axis/–Y-axis
can change as a result of scaling point or scaling factor changes.)
If a sweep angle greater than 360 degrees is specified, a
360-degree angle is used.
z Chord Angle — Specifies the chord angle used to define the arc.
The default is 5 degrees. Refer to the “Chord Angle” discussion in
the Arc Absolute (AA) command discussion (Chapter 20) for
information on setting the chord angle.
Figure 21-27