Scanlab RTC 5 PC Interface Board Installation And Operation Manual page 531

Normal timed_arc_abs
List Command
Function moves the laser focus for the specified marking duration from the current position along
an arc with the specified angle and center point (absolute coordinate values) within a two-
dimensional image field.
Call
timed_arc_abs( X, Y, Angle, T )
Parameters
X, Y
Angle
T
Comments • Unlike arc_abs, the timed_arc_abs command doesn't execute the marking process
with the specified (via
Instead, the speed (i.e. the number of microsteps) will be adjusted so that the arc lasts
as long as specified (see
The total marking time is (for T  5) the sum of the specified (rounded) time and the set
delays.
• 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 new command
®
In RTC 4 compatibility mode, the RTC
values by 16 (the permissible range of values is correspondingly reduced to
[–524288 ... 524287]).
References arc_abs,
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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.
duration of the complete arc marking process in microseconds (as a 64-bit
IEEE floating point value); allowed range: [0 ... 167772160]; the parameter
will be rounded to an integer-multiple of 10; out-of-range values will be
clipped. If T < 5, then timed_arc_abs behaves like arc_abs.
set_mark_speed
chapter 8.10 "Timed Vector and Arc Commands", page
timed_arc_rel
or set_mark_speed_ctrl) marking speed.
page 113).
page 102).
page
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5 multiplies the specified arc center coordinate
198).
chapter 7.2
99). Note that
126).
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