Adjusting The Welder; How To Achieve The Best Welding Results; Mma Welding; Mma Welding Manual - Fimer KING 320 Mode D'emploi

7. ADJUSTING THE WELDER

Once the welding tension has been set,
maintain the length of the electric arc between
5 and 10 mm and adjust the wire speed to
achieve the best welding results. Initially,
carry out a welding test on a well-cleaned
sample, free of any coating, rust or paint.
NOTE The torch trigger controls the following
functions:
- gas flow
- wire movement
- welding current
8. HOW TO ACHIEVE THE BEST
WELDING RESULTS
1. Hold the torch at an angle of 45° from the
workpiece. Keep the gas nozzle (Fig. 4A) at
a distance of approximately 6 mm from the
workpiece.
2. Move the torch with a continuous move-
ment, using a push, not pull, motion. This will
guarantee the gaseous shield of the arc.
3. Avoid welding in high winds.
If the wind is too strong it could carry the gas
away from the welding pool, creating a porous
(weak) weld.
4. Keep the wire clean: never use rusty wire.
5. Make sure the torch cable is free of dents
or coils, which could compromise the correct
movement of the wire.
6. When changing the wire spool, always clean
the wire feed tube with compressed air.

9. MMA WELDING

To select this welding mode, use switch 10,
select MMA and press confirm.
Electric arc welding with a covered MMA
(Metal Manual Arc) electrode or SMAW
(Shielded Metal Arc Welding) is a manual
welding procedure that takes advantage of
14
the heat generated by the electric arc, which
strikes between a covered earthed electrode
and the workpiece. This procedure allows for
the creation of joints in any position, in the
workshop, outdoors, in confined areas or
places that are difficult to access.
With the King 320 it is possible to weld any
type of electrode and diameter. The spark of
the arc occurs by placing the electrode close
to the workpiece.
The correct connection of the electrode
clamp holder and the earth cable can be
seen in the table below:
Front Socket
WELDING
PROCESS
15 di Fig.1
ELECTRODE
MMA
CLAMP HOLDER
Always make sure that the earth and the
electrode clamp holder are kept far apart.

9.1 MMA WELDING Manual

This mode can be accessed using switch 10.
Selecting this option will take you to the
welding screen:
Switch 9 in fig. 1 adjusts the welding current
(very thick workpieces require a higher
current).
Front Socket
+ -
14 di Fig.1
EARTH CABLE