Installation And Operator Instructions - Lincoln Electric LF-31 Bedienungsanleitung

SAFETY MARK: This equipment is suitable for supplying power for welding operations carried out in
an environment with increased hazard of electric shock.

Installation and Operator Instructions

Read this entire section before installation or operation
of the machine.
Location and Environment
This machine will operate in harsh environments.
However, it is important that simple preventative
measures are followed to assure long life and reliable
operation.
•
Do not place or operate this machine on a surface
with an incline greater than 15° from horizontal.
•
This machine must be located where there is free
circulation of clean air without restrictions for air
movement to and from the air vents. Do not cover
the machine with paper, cloth or rags when switched
on.
•
This machine has a protection rating of IP23. Keep
it dry when possible and do not place it on wet
ground or in puddles.
•
Locate the machine away from radio controlled
machinery. Normal operation may adversely affect
the operation of nearby radio controlled machinery,
which may result in injury or equipment damage.
Read the section on electromagnetic compatibility in
this manual.
•
Do not operate in areas with an ambient
temperature greater than 40°C.
Input Supply Connection
Verify the connection of grounding wires from the power
source to the input source.
Gas Connection
Once a gas cylinder has been securely installed on the
machine, connect the gas hose of the input cable to the
gas cylinder using a flow regulator.
Installation of Drive Rolls and Guide
Tubes
•
Mount the wire spool on the output shaft so that, by
dragging the end of the wire, the spool turns
counterclockwise.
•
The wire diameter must fit the diameter stenciled on
the visible side of drive rolls (A). If this is not the
case, unscrew the screws holding the drive rolls (B),
turn them over or replace them with drive rolls that
fit the wire diameter used.
•
Every drive roll is provided with 2 grooves to allow
the feeding of wires with different diameters.
•
Specific drive rolls are available for cored or
aluminum wires. It is also possible to configure the
wire feeder with 4 driven rolls (see "Accessories").
•
Lift the levers (C) of ball bearings (D) which press
on drive rolls (B).
•
Insert the wire into the inlet guide tube and let it out
from the torch adapter (E). Lower the levers
regulating the bearings and use the adjustment nut
(C) to modify the pressure of the bearings.
Idle Roll Pressure Setting
For small wire sizes and aluminum wires, the idle roll
pressure varies with type of wire, surface condition,
lubrication and hardness.
An excessive idle roll pressure may cause wire
distortion. The wire may be jammed or break which may
cause early wear and tear of the feeding motor. Loosen
the adjusting knob and repeat the operation. Very low
pressure may cause wire feeding irregularities.
•
Connect the gun to the gun adapter.
•
Take off the gas nozzle from the gun extremity and
unscrew the contact tip. The wire must feed
regularly without any variation in wire feed speed. If
this is not the case, or if the wire slips, increase the
pressure setting using the adjustment nut until the
wire feed speed becomes regular.
•
Mount again the contact tip and the gas nozzle. Be
sure that both the wire feed speed and the size of
contact tip are correct.
•
Connect the work clamp to the work piece or to the
welding table making sure that the clamp is provided
with a good quality contact. The surface of the work
piece must be clean and must not show any rust,
paint or oily stains.
•
Attention : For cold inch, push (F) in the down
position. You can adjust the cold inch wire feed
speed by turning the left knob (I) while pushing (F)
in the down position. When inching with the gun
trigger, the electrode and drive mechanisms are live
to work and ground.
•
For gas purging, push (F) in the up position.
Connecting the Welding Gun
Position the gun connector, located at the end of the
torch, in front of the gun connector of the wire feeder (E).
Gently push and screw the black locking nut.
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