Scanlab RTC6 PCIe Board - Page 166

RTC6 boards
Doc. Rev. 1.0.21 en-US
7 Basic Functions for Scan Head Control and Laser Control
166
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• Pulse lengths and frequencies (in YAG modes
additionally the Q-Switch delay and the
FirstPulseKiller signal parameters) previously
defined for the Signals for “Laser Active”
Operation are kept unchanged in the Sky Writing
mode. On the other hand, previously defined
LaserOn, LaserOff, mark, polygon or “Variable
Polygon Delays” are not taken into account in the
Sky Writing mode. They are fully functional again
after deactivation of Sky Writing mode.
Deactivation of Sky Writing mode results in
addition of a Mark Delay defined prior to
activation (see Figure 46).
• In Sky Writing Mode 1, the run-in and run-out
phases take place fully within the respective
Mark Command. As a result, execution of the
Mark Command is extended by a time period (in
10 µs) of (2 × Nprev + 2 × Npost ). In
Sky Writing Mode 2 and Sky Writing Mode 3
execution is extended by a time period (in 10 µs)
of at least ( Nprev + Npost ).
• In Sky Writing Mode 1, Jump Delays are
performed normally. The Jump Delay value (in
10 µs, see set_scanner_delays) can be reduced
by approx. (2 × Nprev ) or even to 0. In
Sky Writing Mode 2 and Sky Writing Mode 3, the
Jump Delay is automatically (internally,
dynamically) reduced by up to Nprev .
• Time-based [*]mark[*] Commands and
“Arc” Commands can also be performed in
Sky Writing mode, see Chapter 8.9
”Timed Commands”, page 274. Here, however, a
shorter marking period is coupled with a higher
mark speed and therefore with longer starting
and ending distances and acceleration phase in
the run-in and run-out phases. Herefore, Nprev
and Npost can be separately adjusted with respect
to the specified mark speed.
• the Sky Writing mode is not taken into account
(but also not deactivated)
– During execution of [*]para[*] Commands,
for example, with activated “vector-controlled
laser control”, see Section ”Vector-Defined
Laser Control”, page 206
– During execution of
micro_vector[*] Commands, see Chapter 8.8
”micro_vector[*] Commands”, page 273
• With Sky Writing Mode 2 or Sky Writing Mode 3
activated, the following functionalities of the
2D Jump Commands jump_abs and jump_rel
are not executed:
– Automatic tuning switching in Jump Mode, see
Chapter 8.1.5 ”Jump Mode”, page 217
– Coordinate transformations with at_once = 2,
see list item “With at_once = 2 …”, page 226.