Arc_Abs; Arc_Abs_3D; Arc_Rel_3D - Scanlab RTC 5 PC Interface Board Installation And Operation Manual

Normal

arc_abs_3d

List Command
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
select_cor_table), then the command will have the same effect as arc_abs.
Call
arc_abs_3d( X, Y, Z, Angle )
Parameters
X, Y
Z
Angle
Comments • Except for the additional motion in the third dimension, this command functions simi-
larly to the
• The X and Y axes can be controlled with 20-bit resolution, the Z axis with 16-bit resolu-
tion. The RTC
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.
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RTC 4 RTC 5 new command
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In RTC 4 compatibility mode, the RTC
(the permissible range of values is correspondingly reduced). The value range for Z is
identical for the RTC
Version info Available beginning with version DLL 517, OUT 516, RBF 512
References

arc_abs,

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RTC 5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
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.
absolute Z end coordinate in bits as signed 32-bit values;
allowed range: [–32768 ... 32767];
(an out-of-range value 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);
an out-of-range value will be edge-clipped.
arc_abs command (see the comments there).
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5 (in RTC 5 mode as well as in RTC
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5 and RTC 4.

arc_rel_3d

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4 compatibility mode) automatically
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5 multiplies the values specified for X and Y by 16
page 126).
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