Fronius VR 4000 - Side of Wire-Feed Unit

Side of wire-feed
unit
(2)(1)
(3)
(5)
(4)
VR 4000 - side view
(1) Wirespool holder with brake
for attaching standardised wirespools up to max.16 kg (35.27 lbs.) and
with a maximum diameter of 300 mm (11.81 in.)
(2) 4-roller drive
(3)
"Wire threading/gas test" button
1)
To feed the wire electrode into the torch hosepack with no accompanying
flow of gas or current. While the button is held down, the wire-feed unit
runs at feeder inching speed.
Push button upwards
to set the required gas flow rate at the pressure regulator. As long as the
button is pressed up, gas flows out.
The "wire threading/gas test" button (5) can also be installed as a separate
option on the VR 4000.
(4)
Mode selector switch
1)
for selecting the following modes:
2-step mode
4-step mode
Special 4-step mode (aluminium welding start-up)
Spot welding
(5)
Process selector switch
1)
for selecting the following processes
MIG/MAG Pulse-Synergic
MIG/MAG Standard-Synergic
MIG/MAG standard manual welding
Job welding
TIG welding with touch-down ignition
MMA welding
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