TW Gema OptiSelect, Инструкция по эксплуатации и каталог запасных частей

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V 07/07
OptiSelect manual powder gun Function description
•
15
High voltage generation
The control unit supplies a high-frequency low-voltage signal of approxi-
mately 10 V rms. This voltage is fed through the gun cable (
11 ) to the
high voltage cascade ( 4 ) in the gun body.
In the high voltage cascade (
4
), the low-voltage is high-transformed in a
first step (
c
). This primary high voltage is subsequently rectified and mul-
tiplied in the high voltage cascade in a second step ( d ), until the required
high voltage is obtained at the end (approx. 100 kV). The high voltage is
now fed to the electrode within the spray nozzle (
e
).
Circuit
In addition to the modulated low voltage needed for high voltage genera-
tion, there are signal lines fed trough the gun cable. The control signals
are used for monitoring gun trigger status and gun remote control func-
tions.
The gun is released by a reed switch, which is operated by a magnet in
the trigger (
17 ). The control unit switches the modulated low voltage,
powder conveying, and the rinsing air on.
OptiSelect manual powder gun - circuit
Powder flow and rinsing air
The rinsing air, used by the vented spray nozzle, is connected with its
designated connection on the rear of the gun control unit (see operating
instructions of the powder gun control unit). The functions of the spray
nozzles are described in the corresponding section of this manual.
Remote control by gun
Various functions can be remotely controlled with the + and - keys on the
rear side of the powder gun (OptiSelect gun type):
17
11
4
c d e
Magnet
Reed switch