Scanlab RTC 5 PC Interface Board, Installation And Operation Manual, Page: 464 / 622

RTC
®
5 PC Interface Board
Rev. 1.9 e
10 Commands And Functions
464
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Ctrl Command set_offset_xyz
Function defines an offset for all subsequent coordinate transformations (see "Coordinate
Transformations", page 161 ).
Call
set_offset_xyz( HeadNo, XOffset, YOffset, ZOffset, at_once )
Parameters
HeadNo
Number of the scan head connector as an unsigned 32-bit value:
= 1:
The definition only affects the primary scan head connector.
= 2: The definition only affects the secondary scan head connector
(activation required)
= 0, 3: The definition affects both scan head connectors.
= 4: The definition affects the virtual image field (also see comments)
Only the three least significant bits are evaluated.
XOffset,
YOffset
Offsets for the X and Y directions (coordinate translation relative to the origin
of the cartesian coordinate system) in
bits (as a signed 32-bit value); allowed
range: [–524288 … +524287];
excessive values will be clipped.
ZOffset
Offset for the Z directions (coordinate translation relative to the origin of the
cartesian coordinate system) in
bits (as a signed 32-bit value); allowed range:
[–32768 … +32767];
excessive values will be clipped.
at_once
This parameter (unsigned 32-bit value) determines when the defined
transformation becomes effective:
= 0:
The new total transformation (total matrix and offset) is only
calculated and applied to the current position when the next list
command is executed.
= 1: The new total transformation is calculated immediately (or before the
next list command if a list is currently BUSY or the board is INTERNAL-
BUSY) and applied to the current position. The “laser active”
laser control signals will first be switched off if necessary.
= 2: The new total transformation (total matrix and offset) is only
calculated and applied to the current position when the next
jump_abs , jump_rel , goto_xy or goto_xyz command is executed.
= 3: As with
at_once
= 1, but the laser control signals remain unaffected.
> 3: See
at_once
= 2
Comments • See "Coordinate Transformations", page 161 .
•
ZOffset
is stored only once, applying jointly for both scan head connectors (
HeadNo
is
therefore ignored).
•
ZOffset
<> 0 shifts the working plane (in the direction opposite to the laser beam); for
a hypothetical control value of
(0|0|0)
, this would be by d =
Shift
/ K
z
to the plane
z = d in the direction of the Z coordinate axis (and in the direction opposite to the focus
shift specified by
set_defocus ). Here, K
z
is the calibration factor for the Z direction (also
see "3D Marking Commands", page 172 ).
• The coordinate transformation defined by
HeadNo
= 4 is only in effect during a
Processing-on-the-fly application initiated via set_fly_2d (see the section "Coordinate
Transformations in the Virtual Image Field" on page 185 ). Here, the
at_once
parameter
is ignored. If
HeadNo
= 4, then
ZOffset
will be ignored.