Instruction Manual
TE470/TE480
S.p.A.
COMPLETE USE OF THE STEPPER MENU FUNCTION (NON-LINEAR INCREMENT CURVE)
It is possible to use the non-linear increment curve function by knowing the real electrodes consumption only.
In the aforesaid work method, a linear welding current increment is used during the whole life span of the
electrodes. In actual fact the increase of the contact section of the electrode on the sheet is not linear but has a
pattern that is similar to the one shown in the graph below.
IDEAL CURRENT VARIATIONS
REAL CURRENT VARIATIONS
WITH LINEAR STEPPER
CU
R
R
E
NT
NUMBER OF WELDINGS
The use of the linear increment is an approximation enabling to carry out good results in most applications.
Nevertheless, when it is necessary to get the maximum stability of the working condition, it is possible to set a
non-linear increment curve by defining a specific number of segments.
This type of adjustment requires a precise knowledge of the electrodes wear out; as well as of the parameters to
be used during the electrode life. Therefore, it is necessary to carry out many welding tests in order to determine
the working condition in different moments of the electrodes life.
IDEAL CURRENT VARIATIONS
REAL CURRENT VARIATIONS
WITH PROGRAMMED
INCREMENT CURVE
CU
RR
E
N
T
NUMBER OF WELDINGS
The increment curve is programmed by determining a specific number of linear segments. For each segment it
is necessary to determine both the number of the welding spots, and the desired increment.
The INCREM. N. parameter determines the number of segments to be entered in the increment curve. The
number of welds that make up the segment are entered in the SPOTS 1,2… parameters; the relevant
percentage increment that is to be achieved is entered in the INCREMENT 1,2… parameter.
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