TECNA TE700 - Page 64

Instruction Manual ITEM TE700 TECNA S.p.A.
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The N.TOTAL STEPS parameter determines the number of segments to be entered in the
stepper curve. Enter the number of welds that make up the segment in parameters SPOTS
1,2… and enter the relevant percentage increase to be carried out in parameter INCREMENT
1-L1,2-L1….
The programming procedure is outlined in the STEPPER MENU paragraph.
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
WELDING SPOTS EXECUTED NECESSARY CURRENT
0 (initial electrode diameter) 15 kA
700 17.8 kA
1800 19.5 kA
3000 20.2 kA
4000 (final electrode diameter) 20.7 kA
Therefore calculate the duration (in number of welding spots) and the percent increment of
each segment.
Please, notice that the percent increment must always be calculated referring to the beginning
of the considered segment.
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
%
.
..
rentinitialcu
r
rentinitialcurendcurrent
4 segment % Change 3100
220
220820
100 




The following parameters are consequently set in the STEPPER MENU:
PARAMETER PARAMETER DESCRIPTION VALUE
TOOLS N° Identifier of the tool on which the stepper module works 1
STEPPER WELD Parameter adjustment increase, current in the example ON L1
STEPPER TIME Weld time increase OFF
STEPPER THICK. Electrodes thickness decrease OFF
N.TOTAL STEPS Total number of stepper steps 4
SPOTS 1 Number of spots of first segment 700
INCREMENT 1-L1 Percentage increase of the first segment relevant to law L1 19 %