Instruction Manual
ITEM TE700
TECNA
S.p.A.
62/128
Example:
The welding tests proved that: the electrode life corresponds to 2000 welding spots; that with
new electrodes the required current is 15 kA; that after 2000 spots the electrodes diameter
increment requires a 19 kA current.
The percent variation is calculated as follows:
%
26
100
15
15
19
100
%
rent
initialcur
rent
initialcur
endcurrent
Change
Consequently the following parameters are set in the "
STEPPER MENU
":
PARAMETER
PARAMETER DESCRIPTION
VALUE
TOOLS N°
Identifier of the tool which the stepper module works on
1
STEPPER WELD
Parameter adjustment increase, current in the example
ON L1
STEPPER TIME
Weld time increase
OFF
STEPPER THICK.
Electrodes thickness decrease
OFF
TOTAL STEPS
Total number of stepper steps
1
SPOTS 1
Number of spots of first segment
2000
INCREMENT 1-L1
Percentage increase of the first segment relevant to law L1
26 %
INCREMENT 1-L2
Percentage increase of the first segment relevant to law L2
00 %
The welding program must be set in order to carry out the first welding spot, which is with an
adjustment enabling to obtain the necessary current with the starting electrodes diameter:
15 kA.
Now the welding process can begin. Current will vary conforming to the set increment rule.
The graph below shows its pattern.
INITIAL CURRENT = 15 kA
FINAL CURRENT = 19 kA
INCREMENT PERCENT = 26 %
WELDING SPOTS NUMBERS = 2000
CURRENT INCREASE DURING THE PRODUCTION
0
2
4
6
8
10
12
14
16
18
20
0
500
1000
1500
2000
NUMBER OF WELDING SPOTS
WELDING CURRENT (kA)
On having completed the 2000 welding spots, the control unit stops the production cycle and
displays the following message:
STEPPER [164]
END
WARNING ON TOOLS T1
PUSH [///] TO RESET
