TECNA TE550 - Page 41

S.p.A. ITEM TE550 Instruction manual
Example:
After a number of welding tests, the ensuing life of the electrodes resulted to be 4000 welding
spots and the following current values are required during the 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
Therefore calculate the duration (in number of welding spots) and the percent increment of
each segment.
Keep in mind that the percent increment must always be calculated in relation to the
beginning of the segment being examined.
spots 700=0-700=1segment ofDuration
spots 1100=700-1800=2segment ofDuration
spots 1200=1800-3000=3segment ofDuration
spots 1000=3000-4000=4segment ofDuration
%19100
15
158.17
1001 % 




rentinitialcur
rentinitialcurendcurrent
segmentChange
%10100
8.17
8.175.19
1002 % 




rentinitialcur
rentinitialcurendcurrent
segmentChange
%4100
5.19
5.192.20
1003 % 




rentinitialcur
rentinitialcurendcurrent
segmentChange
%3100
2.20
2.208.20
1004 % 




rentinitialcur
rentinitialcurenecurrent
segmentChange
The following parameters are consequently set in the STEPPER MENU:
PARAMETER PARAMETER DESCRIPTION VALUE
TOTAL STEPS Number of segments per stepper function 4
SPOTS 1 Number of spots of the first segment 700
INCREMENT1 Increment percent of first segment 19
SPOTS 2 Number of spots of the second segment 1100
INCREMENT2 Increment percent of second segment 10
SPOTS 3 Number of spots of the third segment 1200
INCREMENT3 Increment percent of third segment 4
SPOTS 4 Number of spots of the fourth segment 1000
INCREMENT4 Increment percent of fourth segment 3
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