Ransburg Aerobell Copes 75850 - Manual (Page 19)

ELECTROSTATIC VOLTAGE
The RansPak 1000 power supply and control unit
are recommended for use with the Aerobell Copes
applicator. The output voltage can be controlled
by one of two modes: Either mode can be adjusted
from the controller's front panel or through a
programmable controller.
To maintain the highest transfer efficiency, it is critical
to determine the optimum (maximize) high voltage
output without creating a high voltage overload.
Current Regulation Mode
The voltage is controlled using current regulation,
allowing the voltage to vary while maintaining the
desired current set point of 0-300 micro-amps.
Voltage Regulation Mode
The voltage is controlled using voltage regulation,
allowing the current to vary while maintaining the
desired voltage set point of 0-70 kV.
The actual settings will depend upon various coating
application requirements and must not exceed 70
kV or 300 micro-amps during normal operating
conditions.
SHAPING AIR
Shaping air is used to shape the spray pattern.
The lower the pressure, the wider the pattern and
conversely, higher pressures result in
narrower patterns. Shaping air does not help atomize
the material, but does assist in the penetration of
atomized particles into cavity areas. Shaping air
should be kept at a minimum, consistent with coating
requirements. Excessive shaping air may assist some
atomized paint particles to blow by the target not
allowing full “wrap”, or causing paint particles to
bounce back onto the atomizer.
TARGET DISTANCE
The distance from the Aerobell atomizer to target
affects the spray application. For instance, closer
distances give a smaller spray pattern and greater
efficiency. Increasing the distance will give a larger
pattern and possibly reduce efficiency. If the distance
Aerobell Copes - Operation
15
is too great, material may “wrap back” on the Aerobell.
However, coming too close may cause arcing. See
Warning below.
TURBINE AIR
If an air heater is used to increase the turbine drive
air inlet temperature, it should be adjusted only
high enough (not to exceed 140 ° F) to prevent
condensation from forming on the shroud or at the
exhaust ports.
> If the turbine drive air is heated, check
the maximum rated temperature for the air
supply tubing to be used. 9704-07, polyeth-
ylene tubing, is rated for a maximum of 80 °
F (27 ° C). 7113-13, nylon tubing, is rated for
200 ° F (95° C) maximum.
NOTE
> If the thermal insulator and disposable
cover are used, a maintenance schedule
must be developed to ensure contaminated
coves are continually replaced and a stock-
pile of new are kept on hand.
NOTE
The 76739-00, foam insulator, and 76738-00,
disposable cover, are used as a thermal insulator to
prevent condensation from forming on the shroud.
The foam insulator and disposable cover may be used
in place of air heaters.
LN-9230-00.1
> Risk of arcing/fire hazard. The Aerobell
must be located a safe distance from the object
to be sprayed, as well as all other grounded ob-
jects. The safe distance is at least 1 inch per 10
kV of applied electrostatic voltage. Example: if
the Aerobell Copes is used with 70 kV applied
voltage, the electrode tips must be at least 7
inches from the object to prevent arcing.
W A R N I N G !