Pressure Regulation - Mestra R-080246 Manual De Instrucciones

The Planetarium Plus IV R -080246 is a
sand blaster specially designed for micro-
sandblasting small articles of jewellery and
dental prostheses. To get the most out of these
apparatuses, carefully read the instructions
below.
INSTALLATION
• Carefully u npack the apparatus. Inside you
will find the following items:
1. Quick-fit mains
connection with 6 mm diameter tube.
2. 90º PVC elbow-bend
exhauster outlet tube if necessary.
3. Pedal for operating the apparatus.
4. Plastic protection screens (2 units).
• Set up the apparatus on a hard, flat surface
away from sources of vibration and heat, in
an atmosphere that is not too humid. Excess
humidity can cause particles of grinding
medium in the booth to compact, causing
them to clog the micro-sandblasting nozzles.
Ensure the unit is at a height where objects
inside the booth can be handled comfortably.
• Position the plastic protector inside the glass.
• Connect one end of the quick-fit air connector
provided with the unit to the inlet connector
on the rear panel of the booth (4) and the
other end to a compressed air outlet working
at a minimum of 7 bar and a flow rate of at
least 100 l/min.
• Plug the electrical lead (2) into an earthed
230 V 50/60 Hz power outlet.
• Press the main switch (1)
• Connect the drive pedal tube to the nozzle on
the left rear of the unit (3). Then place the
pedal within reach of your foot, in a position
where it can be worked easily. This pedal can
also be set up to be worked with the knee if
this is more comfortable, or if considerations
of space make it advisable.
• Remove the threaded stoppers from the
micro-sandblasting modules (A) and fill the
vessels with grinding medium. Never fill
beyond the maximum level marks on each
vessel. Screw the stoppers back on and
ensure that the seal is leak tight.
• The unit is supplied with colour coded
nozzles in the following diameters:
Yellow nozzle
Blue nozzle
Green nozzle
Red nozzle
compressed
for fitting
Ø 0.75 mm
Ø 1 mm
Ø 1 mm +
Ø 1.25 mm
GB

PRESSURE REGULATION

The blowing pressure of the sandblasting guns
can be set to suit the nature and characteristics
of the work to be done by adjusting the pressure
regulator (B) for each vessel. Pull the pressure
regulator knob up and turn it to select the
pressure desired. Each vessel has its own
pressure gauge, so working pressure can be
selected easily. Once the pressure is set, push
air down the knob to lock it in place.
CONNECTING THE EXHAUSTER
on
The micro-sandblasting unit must always be
used with a forced-draught exhauster. Outlet
tube (J) on the left hand side of the unit is fitted
for this purpose. The exhauster must be capable
of creating a slight vacuum pressure inside the
booth so that dust particles move smoothly and
continuously towards the outlet tube.
The PVC elbow-bend supplied with the machine
can be used if the shape of the external
exhauster makes it necessary.
SAND HEATING SYSTEM
The vessels of the Planetarium sandblaster are
electrically heated to maintain sand at around
40-50 ºC. This eliminates damp and prevents
the sand from compacting and clogging the unit.
This device is especially recommended for work
in humid atmospheres.
To start up the heater just connect the switch on
the top of the booth (F). Au automatic regulator
will then maintain the temperature. The lamp on
the switch burns steadily when the heater is on.
When connecting the automatic sand heater
remember that the pneumatic parts of the unit
will expand during the early stages of heating
until they reach thermal equilibrium. During this
period there may be whistling or other
noises in the electro-valves as they operate.
These noises do not affect the operation or
service life of the unit, but may be a nuisance
to users. We therefore recommend that the
vessel heating system be connected at least half
an hour before work is due to begin.
USING THE APPARATUS
These recommendations will help you obtain the
best results when micro-sandblasting:
1. If the time of year or the conditions at your
laboratory make it advisable to use the sand
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