S.p.A.
TE470/TE480 Instruction
Manual
2.4 - CONSTANT ENERGY WORKING MODE (ONLY IN TE480)
WORKING MODE parameter selected in ENE, the working frame is the following one:
01 08.0~ 08.00kA
02500J 104°12345
Adjustments are performed in the constant energy control unit (TE480) as in a conventional control unit except
for the ENERGY parameter and the weld time parameter for which a precise value is not set, just the minimum
and maximum value.
During welding, the control unit reads the true efficacious welding current RMS, the non-inductive component of
the voltage at the electrodes in volts (V x cos
) and the welding duration in cycles. The product of I x V x cos
x time gives the thermal energy produced during welding, expressed in joules (W x sec).
Since the energy subtracted by conduction and that dissipated between the external sheets and the electrodes,
reduce the precision of the energy measured, it is advisable to weld with short timings and high electrode force.
Therefore it is important, for good execution of the spot quality control, that the welding machine it is applied to
has adequate specifications relating to power, electrode force and welding current for the execution of high A
and B class spots.
To ensure correct use of the control unit in this operating mode, we recommend following the procedure below
step by step:
1. adjust the welding pressure, the welding current and the diameter of the electrodes according to the
traditional tables for the execution of the required welding.
2. disable the stepper function or the dressing function if activated.
3. adjust the minimum welding time to the same as the maximum welding time (WELD MIN = WELD
MAX) with the cycles value indicated in the traditional welding tables.
4. carry one spot weld out and verify that it is satisfactory
5. read the value of the total developed energy and set it in the ENERGY parameter of the working
program
6. adjust the minimum time (WELD MIN) to the number of periods necessary for carrying the spot out with
the new electrodes
7. adjust the maximum time (WELD MAX) to a number of periods that does not spoil the piece
ENERGY TREND READINGS DURING WELDING
0
200
400
600
800
1000
1200
1400
0
2
4
6
8
10
12
14
E
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g
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Semi-cycles
16/52