Daihen Welbee WB-A350P, Руководство пользователя

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S
ETTINGS FOR
AC TIG W
ELDING AND
AC-DC TIG W
ELDING
W
ELDING
C
ONDITION
C
HAPTER
6
6-22
6.7.4 Setting cleaning width
Set the strength of the cleaning action during AC TIG welding.
When either one of the initial condition, welding condition and crater condition is selected, press the
CLEANING WIDTH key. The upper left LED is illuminated and the set value is displayed on the right
digital meter. (At this time, all the LEDs of the unit turn off.)
The cleaning width can be adjusted with the parameter adjustment knob in this condition, Setting range
is within 0 to ±20.
Pressing the CLEANING WIDTH key again or the PARAMETER SELECT keys switches to the
parameter setting just before the adjustment.
The standard set value of the cleaning width is "0", and the cleaning width becomes narrower in minus
direction and the minimum set value is "-20". Also, the cleaning width becomes larger in the plus
direction and the maximum set value is "20".
The following shows the relations among the cleaning width setting, welding result, and electrode wear
degree.
EN refers to the period during which the base material is the positive electrode (+) and the torch is the
negative electrode (-). EP means the period during which the base material is the negative electrode (-)
and the torch is the positive electrode (+).
If you adjust the cleaning width, the EP ratio changes by 1% against the operation amount "1". The
standard value of the EP ratio (the value at the center position "0") differs for each AC waveform, and the
maximum value and the minimum value that can be set as EP ratio also differ.
While setting the cleaning width, you can change the value displayed on the digital meter from the
standard value to the EP ratio. ( 6.10.2.15 F15: Switchover of cleaning width display)
The standard EP ratio for each AC waveform, the maximum value and minimum value you can set are
as shown in the table below.
Minus direction
Cleaning width setting
Plus direction
Narrow Cleaning width Wide
Deep Penetration depth Shallow
Little Electrode wear Much
Small EP ratio Great
AC Mode Standard value Maximum value Minimum value
Standard 30% 50% 10%
Soft 30% 50% 10%
Hard 20% 30% 5%
EP
（＋）
0
EN
（−）
lep
len
EP ratio is the current ratio (ratio of area)
of EP polarity in one AC cycle expressed
in a percentage and is defined by the
following formula.
EP ratio = × 100%
lep
len + lep