TECNA TE470, Instruction Manual, Page: 28 / 52

S.p.A.
TE470/TE480 Instruction Manual
Example:
Welding tests have determined that the electrode life corresponds to 4000 welding spots, and that the following
currents values are necessary at different moments of the electrodes life
SPOTS PERFORMED REQUIRED CURRENT
0 (initial electrodes diameter)
15 kA
700 17.8 kA
1800 19.5 kA
3000 20.2 kA
4000 (end electrodes diameter)
20.7 kA
For each segment, it is then possible to calculate both the duration (expressed in welding spots) and the percent
increment.
Please, notice that the percent increment must always be calculated referring to the beginning of the considered
segment.
spots 700 = 0 - 700 = 1 segment of Duration
spots 1100 = 700 - 1800 = 2 segment of Duration
spots 1200 = 1800 - 3000 = 3 segment of Duration
spots 1000 = 3000 - 4000 = 4 segment of Duration
% 19 100
15
15 8 . 17
100 1 %
 

 


rent initialcur
rent initialcur endcurrent
segment Change
% 10 100
8 . 17
8 . 17 5 . 19
100 2 %
 

 


rent initialcur
rent initialcur endcurrent
segment Change
% 4 100
5 . 19
5 . 19 2 . 20
100 3 %
 

 


rent initialcur
rent initialcur endcurrent
segment Change
% 3 100
2 . 20
2 . 20 8 . 20
100 4 %
 

 


rent initialcur
rent initialcur enecurrent
segment Change
The following parameters are set in the
SETUP MENU
:
PARAMETER PARAMETER DESCRIPTION VALUE
TOTAL STEPS Number of segments per stepper function 4
SPOTS 1 Number of spots of the first segment 700
INCREMENT 1 Increment percent of first segment 19%
SPOTS 2 Number of spots of the second segment 1100
INCREMENT 2 Increment percent of second segment 10%
SPOTS 3 Number of spots of the third segment 1200
INCREMENT 3 Increment percent of third segment 4%
SPOTS 4 Number of spots of the fourth segment 1000
INCREMENT 4 Increment percent of fourth segment 3%
The welding program must be set in order to carry out the first welding spot, that is with an adjustment enabling
to obtain the necessary current with the starting electrodes diameter: 15 kA.
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