Ransburg MGS Multi-Gun Source 76789, 77046 - Manual (Page 8)

CP-99-01
The REA Process is an air atomized method for
applying coatings to objects electrostatically. The
REA system applies a high voltage DC charge to
the applicator nozzle electrode, creating an elec-
trostatic field between the atomizer and the target
object. The target is electrically grounded through
its support which may be either stationary or
moving.
A regulated pressure fluid system delivers coating
material to the atomizer. At the atomizer, air is
applied which atomizes the coating material form-
ing a spray mist which, under the influence of the
electrostatic field, becomes electrically charged.
The charged particles are attracted to and depos-
ited on the target object. The forces between the
charged particles and the grounded target are
sufficient to turn most normal overspray around
and deposit it on the side and back surfaces of the
target. Therefore, a high percentage of the spray
is deposited on the target.
INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION INTRODUCTION
> Except where indicated, this manual
is applicable to all models of the MGS
unit.
The MGS 2000C offers the same features as the
MGS 2001. Additionally, the MGS 2000C is
supplied with High Voltage Modules (one for each
gun) that convert the low voltage output of the
MGS control unit to high voltage. This allows the
MGS system to be used with non-cascade (classic)
guns.
Another difference between the MGS 2001 and
MGS 2000C is the use of reed switches in the
transformer, and air flow switches in the latter, to
trigger the high voltage. This results in a larger box
for the MGS 2000C, as the flow switches are
mounted inside the MGS enclosure, compared to
the MGS 2001 where the reed switches are located
in the gun.
GENERAL DESCRIPTION GENERAL DESCRIPTION GENERAL DESCRIPTION GENERAL DESCRIPTION GENERAL DESCRIPTION
The ITW Ransburg REA Process The ITW Ransburg REA Process The ITW Ransburg REA Process The ITW Ransburg REA Process The ITW Ransburg REA Process
The MGS 2001 is a multi-gun control unit which
may supply low voltage for up to 20 guns. The
circuitry is designed to lock out all other guns if one
gun is actuated with voltage.
The MGS 2001 unit converts standard AC line
voltage to a high frequency, low voltage signal
ranging from 0 to 10 Vrms. This signal is supplied
to the REA/REM spray gun where it is converted
to DC high voltage. The voltage/current charac-
teristic is designed to optimize the charging pro-
cess under varying load conditions and to limit the
operating current to a safe maximum value. In
addition to supplying low voltage output to the
spray gun, the MGS 2001 unit also provides
controls for AC power ON/OFF, high voltage
adjustment, a high voltage meter, a current meter,
a HIGH VOLTAGE indicator light, and a POWER
MGS 2001 Low V MGS 2001 Low V MGS 2001 Low V MGS 2001 Low V MGS 2001 Low Voltage oltage oltage oltage oltage
Control Unit Control Unit Control Unit Control Unit Control Unit
ON indicator light. Additionally, interlock connec-
tions for a conveyor, exhaust fan and high voltage
control are provided with all MGS units.
The MGS 2001 also includes an Independent Gun
Control (IGC) board. This board allows the volt-
age to each gun to be adjusted independently of
the other guns, if desired.
MGS 2000C High V MGS 2000C High V MGS 2000C High V MGS 2000C High V MGS 2000C High Voltage oltage oltage oltage oltage
Control Unit Control Unit Control Unit Control Unit Control Unit
N O T E N O T E N O T E N O T E N O T E
4 4 4 4 4
MGS Multi-Gun Source - Introduction
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