Ronch Ronch Weld 315MAX, User Manual

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2. SUMMARY
• 2.1. Brief Introduction
MMA- series
（
discrete
）
welder is a MMA arc welder which adopts the latest pulse width
modulation (PWM) technology and the insulated gate bipolar transistor (IGBT) power module. It
can change work frequency to medium frequency so as to replace the traditional hulking work
frequency transformer with the cabinet medium frequency transformer. Thus, it is characterized
with portable, small size, light weight, low consumption and etc.
MMA- series
（
discrete
）
has excellent performance: constant current output makes welding arc
more stable; fast dynamic response speed reduces the impact from the arc length fluctuation to
the current; accurate stepless current adjustment and pre-setting function. There are also some
automatic protection functions for under voltage, over current, over heat, etc. inside the welder,
when the problems listed before occurred, the alarm light on the front panel is on and at the same
time the output current will be cut off. It can self-protect and prolong the using life and greatly
improved the reliability and practicability of the welder.
For MMA- series
（
discrete
）
, welding current, arc force and hot start can be adjusted by the
adjustment knob, which can satisfy with several kinds of welding technologies. They can also
realize high quality welding especially for using basic electrode, acid electrode and cellulose
electrode. When using cellulose electrode, they can also realize downward welding for butt joint in
all position.
MMA- series
（
discrete
）
is widely used in Petroleum, chemical, mechanical, shipbuilding,
architecture, boiler, pressure container, war industry and installation and so on.
MMA——Manual Metal Arc welding;
PWM——Pulse Width Modulation;
IGBT——Insulated Gate Bipolar Transistor
• 2.2. Model explanation
The model explanation of arc welding machine is as follows.(Take MMA -315 as an example)