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Technical Documentation and
User Instructions
Laser Mirror Scanner LMS-Q280i
6.3.5.2 Scan Pattern Example
A typical command sequence in order to set a scan pattern with 0.1 degree
angular step width and full (45 degree) scan area would be:
Command
meaning
^P
enter programming mode
SC_NOSCAN< Cr>
stop the scan motion
RF_DELTA_L1000<Cr>
angle step width 0.1 degree
RF_NUMBER_L451<Cr>
so scan range is 45 degree
(number = (45 / 0.1) + 1)
RF_PRENUM_L2
factory setting for internal timing reasons, there
are two laser shots prior to the begin of scan
line
RF_START_L223000<Cr>
start of scan line at angle 22.5000 degree (22.3
+ 2 x 0.1 pre-shots)
note: for calculation of the beam angle,
an offset of 45 degree (50 gon) is added,
see chapter 6.4.1.1.3, PolarAngleID
SC_WRITE<Cr>
set the parameters (and derived scan speed …)
SC_SCAN<Cr>
now start the new scan
W<Cr>
save permanently, if desired, otherwise omit
this command
Q>Cr>
quit programming mode
With the nominal laser pulse rate of PRR = 24.000 Hz, the resulting scan rate
(lines per second) is
LPS = RF_DELTA_L * PRR * 4 / 3600000 = 26.7 lines (scans) per second
Automatic Adjustment of Scan Rate:
The line scan rate is adjusted automatically in case the pulse repetition rate
changes in order to keep the angular spacing constant.
