Amada MD Series, Руководство по эксплуатации

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MD Series
2. Features
2-1
2. Features
MD-A10000A and MD-B5000A are transistor welding power supplies for precision
welding. Small power supply units can be used since all welding is powered by energy
accumulated in a capacitor.
MD-A10000A : Standard type
MD-B5000A : Polarity switching type
■ The switching method adopted for welding current control permits the small model to
achieve high output and high efficiency.
■
Select any of the following three control methods:

Constant-current control ( )
Realizes a stable welding since a fixed current is supplied regardless of the
resistance of workpiece.

Constant-voltage control ( )
Controls the voltage between electrodes. Welding free of surface flash and
expulsion can be performed since the voltage is fixed from the start and the
current is reduced even the welding of material having high specific resistance
and the welding of workpiece having high contact resistance such as cross wire.

Combination control of constant-current and constant-voltage ( )
In the early stage of welding, welding free of surface flash and expulsion can be
performed by the constant-voltage setting. The weld time to start of constant
current can be adjusted.
■ The quick welding current rise is optimal for fine welding.
Current of the later stage is
suppressed and excessive
burn is prevented.
Only the welding
start part can be
adjusted by the
constant-voltage
setting.
Voltage becomes
high and surface
flash and expulsion
can easily occur.
constant-
voltage constant-current
Current waveform
Voltage waveform
constant-
voltage constant-current