TECNA S.p.A. ITEM TE700 Instruction Manual
2.3 – FIX OPERATING MODE (FIX)
In FIX working mode the inverter welding unit does not make any adjustments to the current
supplied during welding. The operator must set the power slicing percentage supplied by the
inverter, which ranges from 5% to 100%. The power supplied during the welding operation
increases for higher slicing values.
In this case the current actually supplied by the inverter involves various factors and is no
longer constant.
The factors that might affect the current supply are: changes in the resistance of the material
to be welded, wearing out of the electrodes and changes in the geometry of the secondary
circuit or mains voltage fluctuations.
The FIX WORKING MODE may be advisable for short-term welding with great resistance
changes or when using the welder as a metal-heating device.
The slicing of the inverter (RO) is kept constant. The slicing is understood to be the
relationship between the switch-on time of the IGBT power devices and their OFF time. The
current supplied to the secondary circuit is no longer constant but depends on the resistance
of the secondary circuit and on the resistance of the material to be welded.
27/128
To Next Page
Loading...
