Scanlab RTC6 PCIe Board - Set_Wobbel

RTC6 boards
Doc. Rev. 1.0.21 en-US
10 RTC6 Commands
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Delayed Short
List Command
set_wobbel
Function Defines the parameters for an ellipse-shaped wobbel motion. “Wobbel” is a motion of
the output position which is added to the regular marking movement.
See Chapter 8.4 ”Wobbel Mode”, page 232.
Call set_wobbel( Transversal, Longitudinal, Freq )
Parameters Transversal Amplitude of the elliptical perpendicular to the momentary direction of
motion or to the one defined by set_wobbel_direction. In bits.
As an unsigned 32-bit value.
Allowed value range: [0…131.071 (=2
17
-1)].
Larger values are clipped.
Longitudinal Amplitude of the elliptical parallel to the momentary direction of motion
or to the one defined by set_wobbel_direction. In bits.
As an unsigned 32-bit value.
Allowed value range: [0…131.071 (=2
17
-1)].
Larger values are clipped.
Freq Frequency of the wobbel movement in Hz (number of ellipses per second).
As a 64-bit IEEE floating point value.
Allowed value range: [–6000…6000].
Larger values are clipped.
Comments • The Wobbel Mode can be used for marking lines with various line widths.
An ellipse-shaped movement is added to the linear marking movement,
resulting in a spiral movement of the laser focus in the Image Field.
Alternatively, a figure-of-8 wobbel shape (horizontal or vertical to the direction of
motion) can be activated by set_wobbel_mode. The line width can be set
by appropriate values for the amplitude and frequency (frequency and mark speed
should be coordinated, see Chapter 8.4.1 ”Wobbel Shapes – Important Notes on
Choosing Appropriate Parameter Values”, page 234).
For arcs, too, the wobbel motion follows the current marking direction
(exception: see below). Therefore, independently of the Cartesian angle, the
effective line width is always the same.
• The Wobbel Mode is terminated by setting both amplitudes and/or the frequency to
zero (more accurate for –n  Freq  n with n = 50000/65536 = 0.7629…).
• The frequency is signed. The wobbel vector rotates clockwise for positive values and
counterclockwise for negative values. Thus, the inner and outer point densities of arcs
can be individually set independently of their actual direction of rotation.
• At the beginning of a marking, (after set_wobbel or a jump), the wobbel start point
is generally set for the same value relative to the vector/arc startpoint; it is repeatedly
continued, however, for Polylines (including arcs).