26
Side of wire-feed
unit
VR 4000 - side view
(1)
Wirespool holder with brake
for attaching standardised wirespools up to max.16 kg (35.27 lbs.) and with a max-
imum 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 inch-
ing 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
1)
"Mode selector switch" option
(2)
(1)
(3)
(5)
(4)
