Weller WMA 3V Page 26 Operating Instructions Manual Download

Page: 26 / 76

Thank you for placing your trust in our company by purcha-
sing the Weller WMA3V. Production was based on stringent
quality requirements which guarantee the perfect operation
of the device.

1. Caution!

Please read these Operating Instructions and the attached
Safety Information carefully prior to initial operation. Failure
to observe the safety regulations results in a risk to life and
limb.

The manufacturer shall not be liable for damage resulting
from misuse of the machine or unauthorised alterations.

The Weller WMA3V corresponds to the EC Declaration of
Conformity in accordance with the basic safety requirements
of Directives 89/336/EEC and 73/23EEC.

2. Description

The WMA 3V comprises all the necessary functions for pro-
cessing of components in SM technology. The alternative
connections are a hot gas pencil (100 W), a soldering bit (25
to 80 W), a de-soldering bit (50 to 80 W) and various other
tools which are specified in the list of accessories. The functi-
ons for dispenser and vacuum tube are also available.

The various functions are controlled via the manual control
panel, footswitches or finger-operated switches. Temperature
is regulated on an analog basis, and the desired temperature
is set by means of the continuous-adjustment facility of a
rotary knob potentiometer.
For the hot gas pencil, temperatures of 150˚C to 550˚C can be
achieved, and on connection of a soldering or de-soldering bit
the setting range is automatically limited to 450˚C.
Attainment of the pre-set temperature is indicated by the
green LED flashing on and off. If the LED is continuously lit,

this indicates that the system is heating up. The hose of the
hot gas pencil is connected to the `Air' nipple, and the vacu-
um hose of the de-soldering bit is connected to the corre-
spondingly marked `Vac' nipple. The air flowrate for the hot
gas pencil has a continuous range of adjustment of up to 10
litres per minute by means of the `Air' precision choke valve.

Warning:

in order to prevent injury, always refrain from con-

necting the vacuum hose to the `Air' nipple.

The hot gas pencil is equipped with a return valve which pro-
tects the hot gas pencil from damage in the event of its being
inadvertently connected to the `Vac' nipple.
A wide range of products is available for carrying out various
soldering functions, comprising hot-air nozzles, suction nozz-
les and solder bits for the corresponding solder tools.
The vacuum for the vacuum tube is generated by a pressure
transducer which is operated either by footswitch or by
means of the manual operation control panel. The vacuum
tube is equipped with a suction connection and a guide rail.
The functions of suction and of deposition of SM components
can be performed by the operator's thumb or index finger.
Precise handling of the smallest SM components is greatly
simplified by the ergonomic form of the tube and by a wide
range of fittings (for example, the rotatable suction attach-
ment with 360˚C angle of rotation).
The dispenser pressure pulse for solder paste or adhesive
metering is generated from the manual control panel either
with a timer control in the approximate range of 0.05 to 1.5
seconds or without using a timer control. The duration of the
pressure pulse in the case of using the timer control is set by
means of the `Time' potentiometer. The required dispenser
pressure is set by means of a pressure regulating valve on
the back panel of the equipment and can be read off on the
pressure gauge on the front panel of the equipment. The
pressure regulation valve can be prevented from rotating by
pressing on the rotary knob.