Instruction manual
ITEM TE550
S.p.A.
2.3
- CONSTANT CURRENT OPERATING MODE
WORKING MODE parameter selected in IK: the working frame is the following one:
PROG. 001 SPOT 12340
WELD CYCLE 01.0 ~
CURRENT RMS 43.26 kA
CONDUCTION DEG 142°
When the control unit works in constant current, it is possible to directly set the welding
current value one wants to carry the welding process out with. During the welding process the
control unit measures, for each half-cycle, the true efficacious welding current RMS value
and, based on a correcting mathematical algorithm, keeps the set current.
In addition to simplifying the programming operations, this operating mode also permits to
keep the desired welding current even if some factors change such as: mains voltage,
welding circuit dimensions and impedance, conditions of the welding tools or surface
condition of the materials being processed.
CONSTANT CURRENT BEHAVIOUR READINGS
Welding current changes (I) according to the mains
voltage (V) variation in standard operating mode
Welding current changes (I) according to the mains
voltage (V) in constant current operating mode
.
It is advisable to activate the CONTROL MODE in DEG and to check, before proceeding with
production, the limit use conditions. For instance, if the use is meant with 2 sheets the limit
conditions would be those with either 1 or 3 sheets. The welding constant current is adjusted
by the TE550 control unit (if the conduction degrees are not close to the value of 180°).
However, still the conduction degrees value has to be checked with one sheet so to be set as
minimum limit and to be checked with 3 sheets so to be set as maximum limit.
However, it is not possible to undoubtedly assure that the piece has been effectively
welded, as all the conditions and parameters involved in the welding process
execution should be checked.
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