Amperage Setting - Speedaire SDR8CG00 Manuel D'utilisation Et De Pièces

WELDER GUIDELINES (CONTINUED)
Electrode Type and Size
Four types of electrodes are recommended for this welder. The
electrodes are commonly known by the AWS (American Welding
Society) designation as follows:
1. E-6011 Deep penetrating
• Flat bead with deep penetrating arc
• For rusted or dirty mild steel general repair work
2. E-6013 General Purpose
• All position, smooth deposit rod with low spatter
• For all mild steel and general purpose work
3. E-7014 Fast fill
• Smooth bead and fast deposition
• Ideal for joints with poor fitup and general repair work
4. E-7018-AC High Strength
• Ideal for pipes and structural applications
• Low hydrogen reduces porosity for a strong weld
Arc Welding Basics
Four basic techniques affect weld quality. These are: amperage setting, weld angle, arc length, and travel speed.
Proper use of these techniques is necessary for good weld quality.

Amperage Setting

The correct amperage involves the adjustment of the welding machine to the required amp setting. This is
regulated by a current range selector switch and a welding current selector knob. The amperage required
depends on the size (diameter) of electrode used and the thickness of the work piece.
Consult specifications listed on the welder. Excessive amps burn through light metals and the weld bead is flat
and porous (See Figure 8). The bead appears high and irregular if the amperage is too low.
Arch Length
Arc length is the distance from the work piece to the tip of the electrode, the distance which the arc must travel.
A proper arc length is essential to generate the heat needed for welding (See Figure 8). An arc that is too long
produces an unstable arc, reduces penetration, increases spatter, and causes flat and wide beads. Too short an
arc does not create enough heat to melt the work piece, the electrode has a tendency to stick, penetration will be
poor, and uneven beads with irregular ripples result. A proper arc should be no longer than the diameter of the
rod.The sound of a proper arc is a steady, crisp sizzle, similar to bacon frying.
Travel Speed
The travel speed is the rate at which the electrode is moved across the weld area (See Figure 8). When the
speed is too fast, the bead is narrow and bead ripples are pointed as shown. When the speed is to slow, the weld
metal piles up and the bead is high and wide. To control travel speed, watch the width of the weld bead (not the
arc) when welding. The weld bead is the orange, molten metal behind the arc. The width should be approximately
twice the diameter of the welding rod. Control travel speed to obtain a consistent bead width.
Slag Removal
anyone in the area.
After completing the weld, wait for the welded sections to cool. A protective coating called slag now covers the
weld bead which prevents contaminants in the air from reacting with the molten metal. Once the weld cools to the
point that it is no longer glowing red, the slag can be removed. Removal is done with a chipping hammer. Lightly
tap the slag with the hammer and break it loose from the weld bead. The final clean-up is done with a wire brush.
When making multiple weld passes, remove the slag before each pass.
Wear ANSI compliant safety glasses (ANSI Standard Z87.1) and protective
clothing when removing slag. Hot, flying debris can cause personal injury to
Same as Electrode Diameter
Figure 7 - Scratching Method
1/16 inch