Scanlab RTC 5 PC Interface Board - arc_rel

RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
234
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Normal
List Command
arc_rel
Function moves the laser focus from the current position at marking speed along an arc with the
specified angle and center point (relative coordinate values) within a two-dimensional
image field.
Call
arc_rel( dX, dY, Angle )
Parameters dX,dY relative coordinates of the arc center in bits as signed 32-bit value; allowed
range: [–8388608 … 8388607] (out-of-range values will be edge-clipped).
Angle arc angle in ° [–360.0° … +360.0°] as 64-bit IEEE floating point value
(positive angle values correspond to clockwise angles)
Comments • The coordinates for the arc center are to be supplied as relative coordinates with respect
to the current position. Otherwise, the command is identical to arc_abs (see the
comments there).
• The current coordinates will be clipped to [–524288 … 524287] (real image field size)
during runtime directly prior to use of the correction table.
RTC
®
4  RTC
®
5 unchanged functionality (except for the extended range of values).
In RTC
®
4 compatibility mode, the RTC
®
5 multiplies the specified arc center coordinate
values by 16 (the permissible range of values is correspondingly reduced to
[–524288 … 524287]).
References set_mark_speed, set_scanner_delays, arc_abs, timed_arc_rel, mark_rel, arc_rel_3d,
mark_ellipse_rel