Operation; Loading The Filler Wire; Mounting And Locking The Wire Spool; Adjusting The Spool Brake - Kemppi X3 Operating Manual

4.

OPERATION

4.1 Loading the filler wire

4.1.1 Mounting and locking the wire spool

LOCKED OPEN
• Release locking nails of wire spool hub by
turning locking knob a quarter round.
• Mount the spool at its place. Note rotating
direction of spool!
• Lock the spool with locking knob, locking nails
of hub remain to outside position and will lock
the spool.

4.1.2 Adjusting the spool brake

Brake force is adjusted through the hole behind the
locking clip. Remove the locking clip by hand, and adjust
the tension and pressure to the friction pads mounted
inside with a screw driver. See diagram and location A.
The load applied varies depending on the size and weight
of the filler wire and spool, but also on the wire feed
speed. The heavier the wire spool and the faster the feed
speed, the greater the need to increase the braking load.
Adjust the pressure, secure the locking clip, set the wire
feed speed and check that the braking force is enough
to ensure the filler wire does not spill from the spool on
overrun.
Too much or unnecessary loads can impact welding
quality, load and wear to the wire feed system.
© Kemppi Oy 2018

4.1.3 Adjusting the pressure arms

Adjust the drive pressure to the filler wire with the thumb
screws mounted over the pressure arms. Notice the grad-
uated scales indicating load. The load applied should be
sufficient to overcome a light braking force applied by
hand to the filler wire, as it exits the welding gun contact
tip.
For smaller diameter and soft filler wires, less feed pres-
A
sure is required. It should be possible to apply a light
breaking force to the filler wire by hand, as it exits the gun
contact tip. But slightly more wire flow restriction should
render the drives rolls to slip slightly over the filler wire
without deforming the wire.
and damage to coated or cored filler wires. It also causes
undue wear of the feed rolls and increases gearbox load, so
reducing service life.
9
X3 MIG Welder
Excessive pressure causes flattening of the filler wire
1814