RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
233
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Normal
List Command
arc_abs_3d
Function
moves the laser focus at marking speed from the current position spirally around an axis
parallel to the Z axis. The x and y components thereby characterize an arc with the
specified angle around the specified axis, while the z component characterizes a linear
motion from the current position to the specified end point. The position of the spiral axis
and the z end coordinate are specifiable as absolute coordinate values.
Restriction
If the 3D option is not enabled or no 3D correction table has been assigned (see
), then the command will have the same effect as
.
Call
arc_abs_3d( X, Y, Z, Angle )
Parameters
X, Y
Position of the spiral axis (parallel to the Z axis) as absolute coordinates in
bits
(signed 32-bit values);
allowed range: [–8388608 … 8388607]; out-of-range values will be edge-
clipped. The complete value range [–8388608 … 8388607] is only usable as
a virtual image field e.g. for (enabled) Processing-on-the-fly applications. The
current coordinates will be clipped to [–524288 … 524287] (real image field
size) during runtime directly prior to use of the correction table.
Z
absolute Z end coordinate in
bits
as signed 32-bit values;
allowed range: [–32768 … 32767];
(an out-of-range value will be edge-clipped).
Angle
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);
an out-of-range value will be edge-clipped.
Comments
• Except for the additional motion in the third dimension, this command functions simi-
larly to the
command (see the comments there).
• The X and Y axes can be controlled with 20-bit resolution, the Z axis with 16-bit resolu-
tion. The RTC
®
5 (in RTC
®
5 mode as well as in RTC
®
4 compatibility mode) automatically
upscales Z coordinate values internally to 20-bit values, so that the three dimensions of
space can be handled equivalently in terms of the supplied mark speed value.
• During calculation of the Z output value to the scan system, any previously defined
offset to the Z coordinate and focal length is taken into account (see
• The z motion isn’t taken into account during calculation of the number of microsteps.
RTC
®
4
RTC
®
5 new command
In RTC
®
4 compatibility mode, the RTC
®
5 multiplies the values specified for
X
and
Y
by 16
(the permissible range of values is correspondingly reduced). The value range for
Z
is
identical for the RTC
®
5 and RTC
®
4.
Version info
Available beginning with version DLL 517, OUT 516, RBF 512
References
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