107
EN
Special functions and options
Arc break watch-
dog function
If the arc breaks and no current starts to flow again within a time defined in the Setup menu,
the system cuts out automatically. The service code "no | Arc" appears on the control pan-
el.
To start welding again, press the torch trigger again.
In the factory settings, the arc break watchdog function (Arc) is set to OFF.
The settings for the arc break watchdog parameter (Arc) are described in "Setup menu -
level 2".
Ignition time-out
function
The power source has the Ignition time-out function. This function is not factory-activated
as standard.
Once the torch trigger is pressed, gas pre-flow begins immediately. Wire feeding then be-
gins, followed by ignition. If no current starts flowing before the length of wire specified in
the Setup menu has been fed, the power source cuts out automatically. The service code
"no | IGn" appears on the control panel.
“E55” is displayed on the JobMaster torch and on the field bus module.
To make another attempt to achieve ignition, press the torch trigger again.
The settings for the Ignition time-out parameter (ito) are described in the "Setup-menu-lev-
el 2" section.
Spatter-free igni-
tion option
The spatter free ignition option (SFi) makes it possible to ignite the arc with practically no
spatter. At the beginning of welding, the wire is slowly fed as far as the surface of the work-
piece and then stopped as soon as it touches it. Next, the welding current is activated and
the wire is pulled back. Once the correct arc length has been reached, the wire starts being
fed at the speed specified for this welding process.
System requirements:
- Firmware version on the power source: OFFICIAL UST V2.60.1
- Firmware version on the wire-feed unit: OFFICIAL SR41 V1.40.15
NOTE! At maximum welding current and very low arc length it is possible that the
arc will break without the service code “no | Arc” appearing. If the arc is reduced
significantly, the welding current would have to be increased to more than the
maximum current in order to be able to maintain the requested welding power. As
this is not acceptable, the power source switches off for safety reasons.
NOTE! The optimum function of the spatter-free ignition option can only be guar-
anteed in aluminium applications in conjunction with Fronius push-pull wire-feed
unit systems.
NOTE! External enabling of the spatter-free ignition option is possible from
firmware version OFFICIAL UST V2.70.1 (power source) upwards. At present,
this option only supports aluminium wires of diameters:
- 0.8 mm / 1.0 mm / 1.2 mm / 1.6 mm
- USA: 0.9 mm (0.035 in.) / 1.2 mm (0.045 in) / 1.6 mm (1/16 in.)
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