41
EN
Method 2
Open up the VR 4040
Take out the wire-spool carrier
Remove the damper (see: “Care, maintenance and inspection - Damper”)
Replace the damper with a metal strip that has 2 holes drilled in it (diameter of holes:
6.5 mm, distance between holes: 310 mm)
Only turn the fixing screws very gently, so that the metal strip can act as an articulated
joint
Insert the wire spool, complete with the wire-spool carrier
Insert the wire (see: “Inserting the wire electrode”) and fix it in the wirefeeder unit
CAUTION!
Danger from elasticity of the spooled wire electrode.
Wire electrode that suddenly breaks away and lashes out can cause very serious injury to
the face and eyes.
► keep the wire end away from your face and body
Cut the wire near where it comes off the spool, and take out the spool
Using a spring gauge, pull the cut-off end of wire downward until the overload coupling
(11) begins to slip
The “lever + drawback pulley” unit (1) moves upward
Read off the value shown on the spring gauge
The value indicated must correspond to the maximum wire tensile force set on the
overload coupling (11)
When fitting the damper back in, ensure that the washers and spacer bushes are fitted
correctly. The piston rod of the damper must be pointing downwards (see: “Care,
maintenance and inspection” - Damper).
Fit the damper back in
Close the VR 4040
Setting the wire
tensile-force limi
-
tation
The VR 4040 unreeling device offers the facility to limit the increased tensile load on the
wire during acceleration by means of an overload coupling (11). This limitation feature is
factory-set to a wire tensile force of 15 N.
The factory setting is ideal for nearly all applications where aluminium welding wires are
used as the filler metal.
Wirefeed speed (m/min)
Wire tensil-force (N)
4
7 - 9
8
14 - 16
12
22 - 24
16
31 - 33
20
40 - 42
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Summary of Contents for VR 4040
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Page 4: ...4...
Page 34: ...34 More details on mounting the end of wire watchdog 2 mm...
Page 55: ...55 EN...