Instruction manual

INTRODUCTION

The CW-18 (CWO-1800) Circle Welder is designed for welding of nozzles into vessels or

domed heads utilizing SUB-ARC, MIG or FLUX CORED PROCESS, with gas shielding. The

CW-18 mounts on a 3-Jaw Chuck welding diameter 6” to 50” O.D.

Features:

• Wire feeder with one set of drive rolls.

• 1/12 HP P.M. motor and rotational speed control.

• 600 AMP gun & cable assembly.

• Internal to NA3

• 50 ft. (15 m) power cable.

• 50 ft. (15 m) gas shielding hose.

• 50 ft. (15 m) weld cable.

• Quick disconnects for all cables.

• Pre and post ow controls.

• Wire reel adaptor for 60 lb. (27 kg) spools.

• Adjustable vertical and horizontal torch positioning system.

• Rise and fall cam assembly with 5” (125 mm) of travel.

• Brushes and collector rings for welding current, rated at 600 AMPS 100% duty cycle.

• Brushes and collector rings for all controls, eliminates cable and hose wrap.

NA 3 Control Provides:

• Wire Spool (amperage) control

• Voltage Control

• Wire burn back

• Weld contact

• Cold wire switch

• Weld start parameter adjustment

• Weld Crater parameter adjustment

SET-UP AND OPERATION:

POWER SOURCE:

Please refer to the included Lincoln NA3 user’s manual for welding power source requirements

and system set-up.

GUNS AND CABLES:

All circle welders come equipped with a gun and cable assembly. It is our recommendation that

at least once a week the liner be taken out of the cable and soaked overnight in a solvent solu-

tion. To keep the wire moving it is also recommended that a felt clip be saturated with a product

like Ferro Slick and feed through the incoming tube of the wire feeder at least once a day.

ADDITIONAL CABLES:

The circle welders are supplied with the following cables:

1. CWO-3971 50’ (15 m) power cable that connects the power source to the cable

connector on the top gear of the machine.

2. CWO-3040 50’ (15 m) weld cable that connects the lead coming out of the top of the

machine using the quick connect connector to your power supply.

3. CWO-9406 50’ (15 m) gas shielding hose that connects the gas tting on the top of the

shaft to your shielding gas supply.