S.p.A.
ITEM TE550
Instruction manual
2.4
- CONSTANT ENERGY OPERATING MODE
WORKING MODE parameter selected in ENE, the working frame is the following one:
PROG. 001 SPOT 12340
WELD CYCLE 01.0 ~
RMS 43.26kA DEG 000°
ENERGY 01351 joule
With a constant energy control unit, all the settings are made as for conventional control units
except for the ENERGY parameter and the welding time parameter, where a set rating is not
required but minimum and maximum ratings are set.
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
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Semi-cycles
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