Lincoln Electric S22693-121 manual General Description, Torch Mounting, Liner Installation

A-2 INSTALLATION A-2

GENERAL DESCRIPTION

The Tandem MIG 800 Amp Welding Torch is designed to deliver two wire electrodes to a single weld pool. The wire electrodes are electrically isolated from one another providing independent parameter control of both electrodes. The torch has two separate wire spacing options. The torch is designed primarily for robotic applications utilizing wire electrodes in the diameters of .035 through .062 inches. Torch ratings are based on the use of shielding gas mixtures con- taining a minimum of 82% argon gas.

The torch is designed for easy maintenance.

The aluminum construction of the gooseneck outer jacket and mounting /clamping assemblies defines the lightweight low profile of the torch. The long goose- neck design is provided for ease of robot program- ming for access to restricted welding joints.

Asingle water-cooling source to circulate water through the nozzle assembly establishes torch cool- ing. The aluminum mounting and clamping assembly serves as an added cooling feature providing a heat sink to draw heat from the contact tip area and goose- necks.

The torch may be operated as either a Tandem con- figuration with two wire electrodes, or as a single wire torch for special applications. Because of the size of the Tandem MIG nozzle, during single wire operation gas delivery through both diffusers is required.

TORCH MOUNTING

The torch mounting arm is an integral part of the torch mounting and clamping assembly, and should not be removed or altered. The mounting arm is designed to place the welding arc at the center line of a robot mounting plate for programming ease. The arm is fur- nished with a .647" hole for inserting a S22637 torch mounting locking wedge. The mounting wedge is designed to secure the torch to a common .75 " diam- eter torch collision sensor shaft.

Due to the weight of the torch and rapid movement of many robotic applications it is recommended that a rigid mount be used to secure the torch to a robot arm. The rigid mount S22693-172 is to be used in conjunction with robot collision sensing software.

NOTE: The S22693-172 rigid mount is a dummy colli- sion sensor. It is not designed to sense a torch colli- sion. For proper operator and equipment protection the S22693-172 rigid mount should only be used in conjunction with robotic arm collision sensing soft- ware.

For hard automation applications and for use with robots that do not have collision sensing software, a heavy-duty collision sensor is recommended (M17809).

The collision sensor must be of proper rating to withstand the high inertia stopping and starting associ- ated with robot high-speed motion without tripping the sensor.

LINER INSTALLATION

1.Lay the torch and cable on a flat surface and extend cables straight.

2.Remove contact tip and diffuser.

3.With cables straightened, loosen 3/8" liner nut from power pin. Grip liner with pliers and slowly remove.

Power Pin

3/8" Liner Nut

4.With dry compressed air blow cable cavity free of any accumulated dust or filings.

5.Feed replacement liner through cable assembly using short strokes to avoid kinking. Twist liner clockwise if necessary.

6.Seat liner retainer O-ring to inside shoulder bore of power pin by tightening the 3/8" liner nut.

7.Replace diffusers, tighten securely.

8.With liner extending through torch body (contact tip removed), trim liner to a 5/16" length.

5/16 " Extension

9.Remove any burr from end of liner that may obstruct wire feeding.

10.Replace contact tip and gas nozzle.

800 AMP TANDEM MIG TORCH