Scanlab RTC 5 PC Interface Board Installation And Operation Manual page 232

Normal arc_abs
List Command
Function moves the laser focus from the current position at marking speed along an arc with the
specified angle and center point (absolute coordinate values) within a two-dimensional
image field.
Call
arc_abs( X, Y, Angle )
Parameters
X, Y
Angle
Comments • If the marking speed has not been previously explicitly set via
set_mark_speed_ctrl, then the marking will be executed at a predefined marking
speed of 1000 bits per ms.
• The "laser active" laser control signals are automatically turned on at the beginning of
the command (or remain on after a directly preceding mark or arc command). The
defined scanner and laser delays will thereby be taken into account (see
"Delay Settings for Synchronizing Scan Head and Laser Control", page
other delays are executed in Sky writing mode (see
Exception: zero-length arc commands (see notes on
• During the conversion of specified coordinate values into scan system output values,
any previously defined coordinate transformations, assigned correction tables etc. are
taken into account after successful microvectorization (see
• 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
values by 16 (the permissible range of values is correspondingly reduced to
[–524288 ... 524287]).
References set_mark_speed, set_scanner_delays, arc_rel, timed_arc_abs, mark_abs, arc_abs_3d,
mark_ellipse_abs
®
RTC 5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
absolute coordinates of the arc center in bits as signed 32-bit value; allowed
range: [–8388608 ... 8388607] (out-of-range values will be edge-clipped).
arc angle in ° as a 64-bit IEEE floating point value
(positive angle values correspond to clockwise angles);
allowed range: [–3600.0° ... +3600.0°] (±10 full circles);
out-of-range values will be edge-clipped.
®
set_mark_speed
page 113).
page 102).
page
5 multiplies the specified arc center coordinate
or
chapter 7.2
99). Note that
126).
232