gagalight RGB4000 Manuel de l'utilisateur - Page 7
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Imprimer la pageScanning System
The product warranty does not cover the damages to the scanning system caused by improper
use of the scanning system or by incorrect programming. Therefore it is essential to
understand how the scanning works and where are the limits of it. In this manual we will
explain only the basics of it but it is the responsibility of every user to educate themselves so
they can avoid damage being caused to the scanning system and costly repairs.
A laser beam comes from a laser module and hits the two moving mirrors of the scanning
system. These mirrors are mounted on the scanner shafts and are moved by the scanner rotors,
one on X and one on Y axis.
An effect such as tunnel (circle) is displayed by a repetitive mechanical movement of the scanners.
For each scanning system and effect, there's a maximal scan rate that is defined by mechanical
load, scanner mirror size and weight, complexity of displayed picture and size of the projection
(an angle under the laser beam is being projected). A different scanning systems have different
scan- rate limits. It is essential to operate the scanning system at scan-rates within its maximal
limit at all times to prevent it from overload damage.
How to establish correct Scan-rate and maximal number of points in an effect
Each effect (picture) contains a different number of graphical points which defines the actual
shape of the effect. The more points an effect contains, the lower the maximum scan rate will be
in relation to the scanning angle.
As an example we ' ll work with the star effect shown below and with the parameters of
quality scanning system:
Let ' s say the star effect is made of 300 graphical points (including non-visible blanking
points) and we know that the maximal scan-rate of our scanning system is 35kpps @ 8
degrees (= 35.000 points per second at 8 degrees projection angle). We also know that we
display the star 35 times per second which is a default frame rate of the control software we
are using.
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