Kemppi Protig 410 User Manual

Page 15

3.1.3 Selection of torch switch operation

2-function:

After having pressed torch switch down, shielding gas starts to flow. Welding starts after

ca. 0,3 s pregas time, welding current goes immediately up to current level according to

settings.

When you release torch switch up, welding current begins to go down smoothly, and

current is cut off after time defined by down-slope time. When welding current is zero,

there begins post gas time.

Tack weld automatics with 2-function: if welding time was less than 3s, there won`t come

any down-slope time.

Begin trial operation of unit with this mode of switch in order to avoid confusion. Go through

all operations and controls of panel.

4-function:

Press torch switch down, shielding gas begins to flow.

Release the switch up, welding is started as above. Welding is continued, when the

switch is released.

Press the switch again down, welding is continued.

Release the switch up, welding is stopped as above.

Stopping unintentional start
With spark ignition:

If arc is not ignited, e.g. torch has not been directed towards work piece, ignition spark will go

out within 1 s from pressing down the torch switch. If eletrode is fastened on the work piece

when the torch is pressed down, welding current will be switched off immediately and there

comes no ignition spark.

With contact ignition:

If electrode is fastened on the work piece, when torch is switched down, and electrode is not

lifted off from the work piece, welding current is switched off within 1 s.

ig 410 H

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