Reference Table; Replacement Of The Wire Spool; Welding Tips; Spot Welding - Helvi READY MIG 100 Manual De Uso

9.1

REFERENCE TABLE

10.0 REPLACEMENT OF THE WIRE SPOOL

Your welding power source is supplied with a mini wire spool of about 0.225 Kg of 0.9mm diameter wire. When the wire
spool is fi nished it can be replaced with a wire spool of 0.45Kg.
The wire is pushed by a roll which is moved by a series of mechanisms. The roll has two grooves one marked by 0.9mm
and the other marked by 0.7mm. It is very important to use the correct groove as explained in paragraph– " PREPARATION
FOR WELDING" – otherwise the wire will not be fed regularly or it will be crashed; make sure that the torch tip matches with
the wire diameter. Your welding power source is supplied with a torch complete of tip for the wire included with the power
source.
Make reference to fi gure 3 and follow the procedure described in paragraph "Installation of the welding wire" for the
replacement of the wire spool.

11.0 WELDING TIPS

1. Keep the torch handle with an angle of 45° with respect to the workpiece and maintain the nozzle about 6mm from
the surface.
2. Move the torch handle with prudence and steadiness.
3. Avoid welding in areas with too much air. The air that blows away the shielding gas from the weld pool mainly causes
porosity in the weld.
4. Keep the wire and its cover clean. Do not use rusted wire.
5. Avoid sharp bends and kinks on the welding hose.
6. If possible, clean with compressed air the wire liner when replacing the wire spool.
7. Periodically remove the dust, using low pressure (3-4bar / 20-30 PSI) from the inside of the power source, to assure
adequate heat dissipation from power source during operation.

12.0 SPOT WELDING

Spot welding is possible by replacing the welding torch with a spot welding kit (not included). You can buy the spot welding
kit by any supplier of welding material. Spot welding can be performed on carbon steel sheets of 0.8mm thickness.
Place the spot welding nozzle on the upper sheet, push the torch and press the trigger to point the fi rst sheet with the second
one. For spot welding the machine must be set at maximum current and maximum wire speed.

13.0 ADJUSTMENT OF THE POWER SOURCE

Set the voltage: use the correct "stick out". The wire "stick out" is the distance between the contact tip and the workpiece.
The wire "Stick out" (sometimes improperly called arc length) should remain in the range 5mm ÷ 10 mm in order to obtain
best welding (and sound) performances.
1. Position the voltage switch in the desired position. Select lower position for lower thickness and higher settings for
higher thickness.
2. Adjust the wire speed. Start using a trial metal sheet thoroughly cleaned from layers of rust or paint. Connect the ground
cable to the workpiece. Adjust the wire speed at high setting. Press the torch switch (note: The torch switch must
be pressed thoroughly in order to perform its three functions, gas fl ow, wire feed and welding current). Start welding
and decrease the wire speed gradually. Continue to decrease the wire speed and listen to the sound. The sound will
change from a crackling noise to a regular and strong buzzing (similar to the sound of frying bacon). This buzzing
sound indicates the correct wire speed for the workpiece being welded. When the current regulation is changed set
again the wire speed. Start always from a higher wire speed. This operation prevents from damaging the contact tip
during welding. During welding the torch should be kept with the 45° angle from the workpiece. Keep the top of the
nozzle at 5-10mm from the work-piece.
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