TECHNOLOGY
The acronym
DSP, which is referred to this line of MOSA welders, stands for "
Digital
Signal Processor", and identifies the fact that the regulation of the
welding parameters is performed by means of a digital technique. More
precisely, in the DSP controller reside the programs which perform the
regulation of the different welding processes supported.
The
implementation of the control is accomplished by a power converter of the "Chopper"
type (Chopper System), which operates at high frequency (20 kHz).
The high
frequency conversion allows to obtain superior welding performances in
comparison with more conventional techniques at low frequency.
FEATURES
Via a rotary
selector you can choose between 5 different welding programs.
- LIFT ARC TIG – This program performs a TIG welding with a "Lift Arc"
start. With this feature the arc is started simply by touching the piece,
without scratch.
- STICK (3 PROGRAMS) - They are specific for the electrode
welding (CC), being characterized by three different arc force levels with
increasing short circuit current from 1 to 3.
- MIG MAG – It is dedicated to WIRE welding, WITH GAS or
FLUX CORED. This welding process is performed at constant voltage (CV).
The front
panel of the DSP control unit is provided with a military type circular
connector which can be connected to a MOSA remote control unit or wire feeder, for
MIG MAG. When plugging an external connector the control is automatically
switched from the front panel knob to the knob on the remote unit.
All the
machines of this series are equipped with digital meters to monitor the welding
current and voltage.
The
software of the control unit, depending on the version of welder on which it is
installed, can handle various functions, including:
a) Power Optimizer - A function that
prevents overloading of the engine during welding
b) VRD - (Voltage Reduction Device) a
function that reduces the open circuit voltage to a safe value when not welding
c) Reverse polarity – In the models
where this function is present , a switch on the panel commands the contactor which
implements the polarity reversal.
The DSP
controller also implements some security features:
- Chopper converter
overtemperature
- Overcurrent during welding (due to failure or malfunction)
- Current
sensor not connected
- Malfunction of the supply voltage
