Overload Protection - Eastwood MP250i Instructions Manual

SPOOL GUN WELDING OPERATION
Your Eastwood MP250i can be used to weld aluminum utilizing the # 20172 Spool Gun (Not Included). The Spool Gun is sold as an accessory to the MP250i, and
you will also need to purchase a cylinder of 100% Argon gas from your local welding supplier. This following welding process is just a baseline to get you started.
• Refer to the 'Suggested Settings' chart which is located inside the side door of your Welder. From the chart select your baseline starting point for the
recommended settings described in the chart.
• Ensure that the polarity is confi gured for DCEP welding.
• Set the process selector switch to MIG.
• Set the MIG / Spool Gun Selector Switch to 'Spool Gun' on Front Panel.
• Connect your ground clamp to the work pieces that are to be welded. Make sure the ground clamp contacts are placed on a clean piece of metal free of
paint, grease, rust, oils, etc. It is recommended to place your ground clamp as close to the weld area as possible.
• Assess your weld area and make sure the welding area is also cleaned of any paint, grease, rust, oils, etc. Aluminum has a layer of oxide on the surface
that should be removed prior to welding.
• Plug in the Welder and turn the switch on the Rear Panel to the "ON" position.
• Open your gas valve on the bottle and adjust the fl ow rate if necessary.
• Depress the Spool Gun trigger for a few seconds pointing the welding gun away from your body and then let go of the trigger and cut the wire back to
~3/4" stick out length.
• Wearing your welding helmet, gloves, and long sleeve shirt and pants, put the end of the wire sticking out of the Spool Gun into the joint to be welded.
• Position the Spool Gun so that it is perpendicular to the base metal with 10-15° angle in the direction of push travel.
• Depress the trigger to start the wire feed which starts the arc. NOTE: When welding aluminum with a Spool Gun it is recommended to use a push
technique. Using a drag technique will result in poor, dirty welds.
• When welding aluminum a spray arc transfer is preferred rather than short arc transfer that can be more commonly used on steels. This method involves
using a longer wire stick out (~3/4"). When the Welder settings and technique have been dialed in the spray arc transfer should create a hissing sound and
little or no spatter. Once positioned the trigger can be pulled and the weld started.
• Release the trigger on the Spool Gun to stop the weld.
• After welding is completed, close the valve completely on the Shielding Gas Bottle, turn Power Switch to the "OFF" position and unplug Welder.

OVERLOAD PROTECTION

Your Eastwood MP250i Welder is equipped with an internal overload breaker and an external circuit breaker. If the Duty Cycle is exceeded, the internal breaker
will trip and stop power supply to the drive motor although the fan will still run to cool the unit. In the event of an overload, the Overload Indicator on the Front
Panel will illuminate GREEN and the Circuit Breaker on the Rear Panel of the Welder will trip. This circuit breaker must be reset manually. Before resetting the
circuit breaker button allow the Welder to cool for a minimum of 15 minutes.
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Eastwood Technical Assistance: 800.544.5118 >> techelp@eastwood.com