FitWeld Evo 300 [15/20] Adjusting the shielding gas flow

2.6.4 Adjusting the shielding gas ow

Using a rotameter as shown in the picture, you can adjust the gas ow rate to the gun by

turning the shielding gas adjustment regulation valve screw inside the FitWeld Evo 300 wire

cabinet.

By turning the screw anticlockwise you increase the gas ow to the gun nozzle. Clockwise

adjustment will reduce the gas ow rate.

MMT32

l/min

NOTE! The shielding gas ow rate set from the gas cylinder regulator must exceed the ow rate

measured at the welding gun. If these rates are the same, the gas indication light will shine on the

control panel and welding is prevented.

2.6.5 Reversing polarity

Some ller wires are recommended to be welded with the gun in the negative pole, so the

polarity should be reversed. Check the recommended polarity from the ller wire package.

To reverse polarity:

1. Disconnect the machine from the mains.

2. Pull away the rubber covers to expose the terminal pole connections and allow access to

the Allen screws.

3. Using the Allen key attached to the wire cabinet wall, unscrew the pole connection bolts.

Note the correct order of washers.

4. Interchange the cables.

5. Install the washers in the correct order and tighten the bolts rmly.

6. Replace the rubber covers correctly.

NOTE! The rubber cover must always protect the poles.