S.p.A. ITEM TE550 Instruction manual
Example:
After having run the welding tests, the result was that the usable life of the electrodes = 2000
welding spots. Another fact that ensued was that the required current for new electrodes = 15
kA, whereas after 2000 welding spots the diameter increase of the electrodes requires a
current of 19 kA.
Therefore calculate the change in percent as follows:
%26100
15
1519
100%
rentinitialcur
rentinitialcurendcurrent
Change
Consequently the following parameters are set in the “STEPPER MENU”:
PARAMETER PARAMETER DESCRIPTION VALUE
TOTAL STEPS Number of segments for stepper function 1
SPOTS 1 First segment spots number 2000
INCREMENT1 First segment increment percent 26%
The welding program should be adjusted for carrying out the first welding spot followed by the
adjustment that permits to obtain the required current with the starting electrode diameter: 15
kA. It does not matter whether the TE550 is programmed for a percent adjustment or a
constant current adjustment since the stepper function is operational in both modes.
Now the welding process can begin. Current will vary conforming to the set increment rule.
The graph below shows its pattern.
CURRENT INCREASE DURING THE PRODUCTION
INITIAL CURRENT = 15 kA
FINAL CURRENT = 19 kA
INCREMENT PERCENT = 26 %
WELDING SPOTS NUMBERS = 2000
WELDING CURRENT
kA
0
2
4
6
8
10
12
14
16
18
20
0 500 1000 1500 2000
NUMBER OF WELDING SPOTS
Upon having completed all 2000 welding spots the TE550 stops the production cycle and
displays the following message:
At this point the operator replaces the electrodes (or resets their original diameter) and clears
the spots counter to clear stepper calculations.
ERR 104
MAX SPOTS NUMBER
The TE550 resets the initial work parameters and begins a new increment phase.
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