Campbell Hausfeld WG2045, WG3000, WG2044, WG2040 manual Shielding Gas Preparation

! DANGER

Model WG2040, WG2044, WG2045, WG3000

Assembly (Continued)

Torch Diffuser

Contact Tip

Nozzle

Figure 6 - Torch Nozzle

Contact Tip Markings

Mark	Wire Size
0.6 mm	.024"
0.8 mm	.030”
0.9 mm	.035”

DUTY CYCLE / THERMOSTATIC PROTECTION

Welder duty cycle is the percentage of actual weld time that can occur in a ten minute interval. For example, at a 20% duty cycle, actual welding can occur for two minutes, then the welder must cool for eight minutes.

Internal components of this welder are protected from overheating with an automatic thermal switch. A yellow

lamp is illuminated on the front panel (on/off switch) if the duty cycle

is exceeded. Welding operations may continue when the yellow lamp is no longer illuminated.

POLARITY

To change between flux wire and MIG wire the polarity must be changed.

1.Open the wire feed door.

2.Locate red (+) and black (-) polarity connectors just above wire feed mechanism (See Figure 7).

3.For MIG welding with gas, connect torch cable from wire feed mechanism to red (+) polarity connector, then connect work cable to black (-) connector.

4.For flux-core welding, connect torch cable from wire feed mechanism to black (-) polarity connector, then connect work cable to red (+) connector.

Figure 7 - Cable connection

Shielding Gas Preparation

Improper handling

! DANGER and maintenance of compressed gas cylinders and regulators can result in serious injury or death!

Always secure gas cylinders to tank bracket kit, a wall or other fixed support to prevent cylinder from falling over. Read, understand and follow all compressed gas and equipment warnings in the safety instructions.

NOTE: Shielding gas is not required if flux-cored welding wire is used.

GAS TYPES

There are 3 types of gas generally used for gas metal arc welding; 100% argon, a mixture of 75% argon and 25% carbon dioxide (C25) or 100% carbon dioxide.

Use ONLY the type of gas

recommended for your welder. Use ONLY an inert, non-flammable type of gas. Failure to do so will result in a very hazardous situation.

NOTE: 100% carbon dioxide is not

recommended due to unsatisfactory weld beads.

The 75/25 mixture is recommended for general steel welding. For aluminum welding, use 100% argon. Cylinders of either type gas may be obtained at your local welding supply outlet. Secure cylinder in place on your welding machine or other support to prevent the cylinder from falling over.

Obtaining Correct Gas Type. The gas used in any welding application for your welder must be an INERT, NON- FLAMMABLE TYPE. You can get the type of gas needed from a nearby welding gas distributor (often found in the yellow pages under “Welders” or ‘Welding Equipment”).

REGULATOR

An adjustable regulator without gauges is supplied with this welder. The regulator provides a constant shielding gas pressure and flow rate during the welding process. Each regulator is designed to be used with a specific gas or mixture of gases. The argon and argon mixture use the same thread type. The 100% carbon dioxide uses a different thread type. An adapter is available at your local welding gas supplier to change between the two.

HOOKUP PROCEDURE

!WARNING

Cylinder gas is under high pressure. Point cylinder outlet away from yourself and any bystanders before opening.

1.With cylinder securely installed, stand on side of cylinder opposite cylinder outlet then remove cylinder cap and open valve slightly by turning

Figure 8 - Hookup

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