MIG Welder

The Millermatic 210

Make: Miller Electric

Model: Millermatic 210

Ace: Wyatt Bertis (wbertis22@georgefox.edu).

Location: Welding Shop

Description

The Millermatic 210 is a wire feed metal inert gas (MIG) welder that is meant for light industrial use. Metal inert gas is a welding process in which an electric arc forms between a consumable MIG wire electrode and the base metal, which heats the base metal, causing them to melt and join. Along with the wire electrode, a shielding gas feeds through the welding torch, which shields the process from contaminants in the air. This is the easiest and most common type of welding which makes it perfect for those learning to weld. It uses 72/25 CO2 and Argon gas mixture to shield the molten weld from oxygen. If the weld pool is exposed to oxygen, it can create a handful of problems such as porosity and excessive spatter in the bead. This welder is capable of welding carbon steel as well as stainless steel. Below is a short video explaining MIG welding.

Documentation

Terminology

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User Manual

Training

Overview

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Demonstration

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General Procedure

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Safety

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Certification

Foxtale Quiz

Maintenance

General maintenance

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Specific Maintenance Tasks

Maintenance Procedure	Frequency	Done By
Sample	Sample	Sample

The current Ace of the MIG Welder is Wyatt Bertis (wbertis22@georgefox.edu).

Documentation

• Owner's Manual

Procedures

Prior to Welding

1. Place the fume hood over the area you will be welding at
2. Attach the ground clamp to the bench your workpiece will be on  
3. Ensure the workpiece is touching the conductive surface of the table
4. Ensure the adjusting screw on the tank regulator is loose (Do not unscrew all the way)
5. Open cylinder valve all the way
6. Turn the adjusting screw (clockwise) to increase pressure to 15 CFH.
7. Identify material type and thickness that is going to be welded
8. Refer to MIG welding chart for specified adjustments, specific to your application
9. Turn on the welder and adjust wire speed and voltage
10. Ensure you are wearing all necessary protective gear
11. Ensure the welding torch has proper amount of wire protruding from tip (about ¼ inch) If too long, trim excess with the welding pliers.
12. Weld!   

After Welding

1. Close gas cylinder valve
2. Bleed remaining gas by depressing trigger until regulator drops to 0
3. Back out adjusting screw on regulator (Do Not unscrew all the way)
4. Turn off the welder
5. Remove ground clamp

Warnings

1. Don’t weld lead, zinc, copper, cadmium, stainless, or beryllium. Welding these materials can be harmful if not equipped with proper safety gear and training.  
2. Don’t weld in wet gear or standing water
3. Always turn gas and the welder off when you are done in the welding shop
4. Never weld without a welding helmet
5. Never weld without gloves
6. Don't weld with the vent hood off
7. Don't weld with the gas off
8. Don't exceed gas pressure past specified value
9. Don’t unscrew valve adjusting screw all the way out