Lincoln Electric POWERTEC i250C STANDARD Operator's Manual page 24

For non-synergic mode can set:

Wire Feed Speed, WFS

The welding voltage

Burnback Time

Run-in WFS

Preflow Time/ Postflow Time

Spot Time

2-Step/4-Step

Start Procedure

Crater Procedure

Wave Control: Pinch
Welding GMAW and FCAW Process in
synergic mode CV
In synergic mode, the welding voltage is not set by user.
The correct welding voltage will be set by the machine
software. Optimal voltage value depends of input data:

Wire Feed Speed, WFS.
If it is needed, the welding voltage can be adjusted by the
right knob [36]. When the right knob is rotated, the display
will show a positive or negative bar that indicates if the
voltage is above or below the optimal voltage.
Additionally user can manually set:

Burnback Time

Run-in WFS

Preflow Time

Postflow Time

Spot Welding Settings

2-Step/4-Step

Start Procedure

Crater Procedure

Wave Control: Pinch
Loading the Electrode Wire
Depending on the type of wire spool it can be installed on
the wire spool support without adapter or installed with
use applicable adapter that must be purchased separately
(see "Accessories" chapter).
WARNING
Turn the input power OFF at the welding power source
before installation or changing a wire spool.

Turn the input power OFF.

Open the side panel of the machine.

Unscrew the Locking Nut [46] and remove it from the
Spindle.

Place the spool [23] on the Spindle [24] making certain
the Spindle Brake Pin is put in the hole in back side of
spool.
If using adapter (see "Accessories" chapter), place it
on the spindle [24] making certain the spindle brake
pin is put in the hole in back side of the adapter.
WARNING
Position the spool so that it will rotate in the same
direction as wire feed and electrode wire should feed from
the bottom side of the spool.

Install the Locking Nut [46]. Make sure that the
Locking Nut is tightened.
English
Adjustments of Brake Torque of Sleeve
To avoid spontaneous unrolling of the welding wire the
sleeve is fitted with a brake.
Adjustment is carried by rotation of its screw M10, which
is placed inside of the sleeve frame after unscrewing the
brake locking nut.
46. Locking Nut.
47. Adjusting Screw M10.
48. Pressing Spring.
Turning the M10 screw clockwise increases the spring
tension and increase the brake torque
Turning the M10 screw anticlockwise decreases the
spring tension and decrease the brake torque.
After finishing of adjustment, you should screw brake
locking nut again.
Adjusting of Pressure Roll Force
The pressure arm controls the amount of force the drive
rolls exert on the wire. Pressure force is adjusted by
turning the adjustment nut clockwise to increase force,
counterclockwise to decrease force. Proper adjustment of
pressure arm gives the best welding performance.
If the roll pressure is too weak the roll will slide on the
wire. If the roll pressure is set too heavy the wire may be
deformed, which cause feeding problems in the welding.
The pressure force should be set properly. For this
purpose decrease the pressure force slowly until the wire
just begins to slide on the drive roll and then increase the
force slightly by turning of the adjustment nut by one turn.
22
46
47
48
Figure 13
WARNING
English