Weco WF-104, Инструкция по эксплуатации, Страница: 35 / 96

WELD THE WORLD
Cod. 006.0001.0940
16/04/2018 V.2.25
WF-104
WF-108
35
ENGLISH
• BURN BACK
○ The BURN BAck
vAlUe iS ASSOciATed wiTh The qUANTiTy OF wiRe ThAT iS BURNT AT The eNd OF The weld
-
iNg pROcedURe
.
○ In synergic welding the optimal BURN BACK value (indicated with SYN) varies in general with
variations of the synergic parameters.
○ In synergic welding, if the value BURN BACK = SYN is selected the welding power source will
always have the optimal BURN BACK value set when the main welding parameter changes.
○ If you set a value other than SYN, this value is stored and fixed.
- Consequences of a higher value:
• Wire significantly retracted into the torch nozzle.
- Consequences of a lower value:
• Stick-out at welding start is longer.
• POST GAS
○ Time of post gas delivery when the welding arc is extinguished.
○ This is useful when welding at high current values or with materials that oxidise readily to cool the
weld pool in an uncontaminated atmosphere.
○ In the absence of specific requirements the value should generally be kept low.
- Consequences of a higher value:
• More effective pickling (improved appearance of workpiece at the end of the welding pass).
• Higher gas consumption.
- Consequences of a lower value:
• Lower gas consumption.
• Oxidation of electrode tip (more difficult arc strike).
• POWER FOCUS
○ The parameter changes the concentration of the electric arc, increasing or reducing the energy
transferred to the workpiece.
- Consequences of a higher value:
• Welding arc concentration.
• Penetration increase.
• SPOT TIME
○ When the torch trigger is pressed the welding arc persists for the time set in the parameter.
○ Press the torch trigger again to resume the welding process.
○ The welding process cannot be interrupted once it has been started.
○ When the torch trigger is pressed, if the arc does not strike within 10 seconds, the process is
deactivated.
○ The welding parameters can be modified during the welding process.
• B-LEVEL
○ The parameter enables a special torch trigger function.
○ Pressing and releasing the torch trigger rapidly in welding mode (in time 2) serves to switch from
the main welding current to a secondary current.
○ Pressing and releasing the torch trigger again switches from the secondary current to the main
current. This switching can be performed repeatedly at the discretion of the operator.
○ To close the welding cycle (time 3) operate the torch trigger with a prolonged press. When the
trigger is released the welding cycle will close (time 4).
• START 3LEV
• Start in 3 levels operation
○ The parameter adjusts the 1st level wire feed rate as a percentage of the wire feed rate set for