Product manual
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Wire is fed using two pairs of feed rollers, see Figure 8, which are linked to each
other. The power from the motor is transferred to the rollers via a pinion on the
motor shaft. The two upper rollers (1) are spring-loaded.
The pressure between the upper and lower rollers can be adjusted individually
using an adjuster screw (2).
All rollers are fitted with sleeve bearings.
The lower feed rollers (3) have grooves for two different wire diameters. The roll-
ers are turned so that the marking for the required wire diameter is facing forwards.
The motor (4) is of a permanent magnetised type and is equipped with an optical
tachometer meter for accurate speed control.
An inlet guide (5) is fitted when the marathon pac is used. The nozzle is locked
using the screw (6).
When the bobbin is used, the wire liner is fitted directly to the feed mechanism and
is locked by screw (6). The wire can roll off of the bobbin when the feed mecha-
nism stops at a high wire feed speed. To rectify this, the preset value on the brake
hub is changed to 5 kpcm (= 0,5 Nm), by turning the knob until the arrows align
with each other (locked bobbin position). The springs on each side of the knob are
turned synchronously inwards to increase the braking effect. If the wire feed speed
is too high so that the adjustment has no effect then the marathon pac ought to be
used.
Figure 8 Wire feed unit.
To guarantee proper wire feed the grooves in the feed rollers must be cleaned at
regular intervals. The wire used should be as clean as possible as filth can give rise
to slippage.
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