GB
6.2
Switching- -on and overheating protection
When machine is switched on with the illuminated switch [1], its lamp is on. If the ma-
chine is not overheated (lamp [2] is off) it is ready to work. If the internal temperature
during welding becomes too high, the welding is interrupted and disabled. This state is
indicated by permanent lighting of the orange indicating lamp [2] on the front of the unit.
It resets automatically when the temperature falls down.
6.3
Operation
Operator can manually select and set welding parameters as follows:
required welding voltage ( and thus welding current) with knob [3]
S
appropriate wire feed speed with knob [7]
S
burn--back time with potentiometer [10] located in the wire feeder compartment
S
spot welding, activated by turning the knob [6] clockwise, spot welding time
S
increases while turning the knob [6] clockwise; set knob [6] in the left utmost
position in order to return to the continuous welding.
If the welding gun is used, welding process starts after its trigger is pressed and the wire
speed is controlled with potentiometer [7] on the front panel.
If the spool--on gun is used, welding process starts after its trigger is pressed, the spool--
on gun motor starts and wire speed is controlled with the potentiometer in the spool--on
gun grip.
Note: For spool--on gun current cable connection it is necessary to use the OKC "T"
adapter (see Accessories in User Manual).
6.4
Wire feed pressure
Start by making sure that the wire moves smoothly through the wire guide. Then
set the pressure of the wire feeder pressure roller(s). It is important that the
pressure is not too great.
Fig 1
To check that the feed pressure is set correctly, you can feed out the wire against
an insulated object, e.g. a piece of wood.
When you hold the gun approx. 5 mm from the piece of wood (fig. 1) the feed
roller(s) should slip.
If you hold the gun approx. 50 mm from the piece of wood, the wire should be
fed out and bend (fig. 2).
MM215Pe
Fig 2
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