Setting Up The Work Piece - Matco Tools MP200STDVI Owner's Manual

EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND SKIN!
Prolonged exposure to the welding arc can cause blindness and burns. Never strike an arc
or begin welding until you are adequately protected. Wear flame-proof welding gloves, a
heavy long sleeved shirt, trousers without cuffs, high topped shoes, and an ANSI approved
welding helmet.
h. Touch the tungsten that is installed in the TIG torch, to the work piece and quickly
pull away approximately 1/4" to create an arc.
DC STICK OPERATION
• High voltage danger from power source! Consult a qualified electrician for proper
installation of receptacle. This cutter must be grounded while in use to protect the operator
from electrical shock.
• Do not remove grounding prong or alter the plug in any way. Use only the supplied adapter
between the welder's power cord and the power source receptacle. Make sure the POWER
switch is OFF when connecting your plasma cutter's power cord directly to a properly
grounded 230 VAC, 60 Hz, single phase, 50 amp input power supply. Or, when using the
supplied adapter, connect the 120V adapter to a properly grounded 120V, 20 amp input
power supply.

1. SETTING UP THE WORK PIECE

1.1 Welding positions:
There are two basic positions, for welding: Flat and Horizontal. Flat welding is generally easier,
faster, and allows for better penetration. If possible, the work piece should be positioned so that the
bead will run on a flat surface.
1.2 Preparing the joint:
Before welding, the surface of work piece needs to be free of dirt, rust, scale, oil or paint or it will
create brittle and porous welds. If the base metal pieces to be joined are thick or heavy, it may be
necessary to bevel the edges with a metal grinder. The correct bevel should be around 60 degrees.
See following picture:
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