SAMES KREMLIN Nanogun+ Airmix, Инструкция по эксплуатации

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26
DRT7115
E - 2022/11
Member of EXEL group
3.4. Operation
Pressing the trigger serves to delay the order to open the air valve, then activation of the high voltage, and
lastly the paint nozzle needle. The high-voltage order may be inhibited by shifting the gun switch.
The Airmix
®
gun is equipped with a magnetic sensor that detects the trigger position. This
sensor serves to activate the high-voltage power supply once the air valve returns to a value lying between
1 and 1.8 mm.
• The button located in back of the gun does not serve to adjust the paint flow rate; nonetheless, it is
possible to adjust it by modifying the nozzle gauge and/or the incoming product pressure.
• The side button serves to adjust the jet dimension within a range that narrows as the product pressure
increases.
• Clamped screw: large impact.
• Loosened screw: reduced impact.
• In order to modify the jet dimension, it is necessary to change the nozzle.
3.5. For use
Paint Recommendations
Generally speaking, all paints and varnishes used with the conventional pneumatic guns are typically used
with the Airmix
®
gun as well. The dyes contained in the paint must be less than 5 mm.
3.5.1. Viscosity
The best results are obtained with a viscosity ranging from 25 to 30 seconds, measured with AFNOR cup 4.
However, paints with a lower or higher viscosity (for example 14 to 50 seconds or more) can be sprayed.
3.5.2. Resistivity
Use a paint whose resistivity is suitable for the Airmix
®
spray gun model that you are using.
Optimum resistivity ranges from 0.5 to 500 M
Ω
.cm. Low resistivity promotes a good wraparound effect, but
there may be back spray onto the operator is the booth is inadequately ventilated, especially when using the
round spray.
Much lower resistivity (for example 0.1 M Ω .cm) will short circuit the high voltage and therefore prevent any
wraparound effect. High resistivity (e.g. 1000 M Ω .cm) will significantly reduce the wraparound effect will be
greatly reduced. Paint resistivity can be easily checked using the Sames AP 1000 resistivohmmeter.
3.5.3. Settings of the spraying parameters
Regardless of the type of nozzle, the quality of spraying depends on both the supply pressure and the
product viscosity: as viscosity increases, pressure must also rise, yet the final outcome is also influenced by
the product’s proportions of heavy solvent / light solvent.
A few key points:
• Viscosity: 40 sec CA4: minimum product pressure of 70 bar.
• Viscosity: 60 sec CA4: minimum product pressure of 90 bar.
• Viscosity: 90 sec CA4: minimum product pressure of 130 bar.
The addition of more air serves to reduce the impact width by 25% at a 120-bar pressure; moreover, the
higher the product pressure, the smaller the influence being exerted by the additional air. In order to limit the
production of overspray, it is recommended to never exceed an air pressure of 4 bar.
Using the nozzles with small impact width (XX-09 or 11), whenever the additional air is open, the jet is
practically round.