Scanlab RTC6 PCIe Board Installation And Operation Manual page 202

"Spot Distance Control"
The "Spot Distance Control"
available for scan systems equipped with
SCANahead servo control (for example, excelliSCAN
series).
With set_auto_laser_control(
("Spot Distance Control"), temporal output pulses
are controlled to a geometrically constant pulse
distance. This pulse distance is defined by
spot_distance or spot_distance_ctrl. The
parameters Value, MinValue
meaning with the "Spot Distance Control"
functionality.
The speed correction occurs with
Mode
= 2 + 16 + (optionally) 32, (see above).
"Spot Distance Control" cannot be combined with
Mode
= 1, 2 or 5.
The correction is more precise and dynamic than the
Ctrl
comparable control with
successful use, a laser with "pulse-on-demand"
functionality should be used that outputs laser pulses
immediately when triggered by the LASER1 signal.
Frequency modulations are set with an accuracy of
1/64 µs for the pulse distance.
A comparison of a typical marking result with
"Automatic Laser Control"
"Automatic Laser Control" is shown in
As an alternative to set_auto_laser_control
Ctrl
= 7, the marking shown in
be carried out with Sky Writing
However, when using set_auto_laser_control
Ctrl
= 7 the process time is often shorter.
RTC6 boards
Doc. Rev. 1.0.21 en-US
7 Basic Functions for Scan Head Control and Laser Control
functionality is only
Ctrl
= 7 )
MaxValue
and have no
= 5 (HalfPeriod). For
(Ctrl = 7) and without
Figure 57.
with
Figure 58 could also
switched on.
with
Notes
• set_auto_laser_control(
("Spot Distance Control") cannot be combined
with:
– "Vector-controlled laser control" by
set_vector_control (Ctrl
(1)
– Laser Mode 4
(1)
– Laser Mode 6
• set_trigger/set_trigger4/set_trigger8
(signal 24) records an internal control signal but
not HalfPeriod.
(1) In Laser Mode 4 and Laser Mode
signal is outputted that cannot be varied.
Ctrl
= 7 )
= 5) (HalfPeriod)
6, only a standby
202