Lincoln Electric SVM170-A Spool Gun, Operating Instructions For Timer Kit, Accessories

C-3 ACCESSORIES C-3

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OPERATING INSTRUCTIONS FOR TIMER KIT

If the optional Timer Kit (K1701-1) is installed, select the desired mode with the selector switch:

A. Normal Welding mode provides weld power only while the trigger switch is depressed. This is the same operation as when the Timer Kit is not installed.

B. 4-Step Trigger interlock mode eliminates the need to hold the gun trigger while welding. It operates in 4 steps:

1.Close trigger and establish welding arc.

2.Release trigger and continue welding.

3.Reclose trigger near end of weld.

4.Release trigger again to stop welding.

If the arc is broken while using this feature, the machine will reset to the "trigger off" condition automatically.

Note: 4 Step Trigger interlock mode does not function with a Spool Gun.

C. Spot Weld Mode is is used for tack welding parts into position or for spot plug welds to hold thin sheet metal together prior to manual stitch or continuous welding. To use this feature, adjust the On-Time (0- 5 seconds) as appropriate to obtain the desired results. Closing the trigger initiates a single timed spot weld cycle.

Plug welds are made by using a punch to make a 3/16" (5 mm) diameter hole in the top sheet and arc welding through the hole into the back sheet.

To make spot plug welds, punch 3/16" (5 mm) holes in the top sheet. Set the Spot Time control to approximately 1.2 seconds and set the procedure for the metal thickness to be welded. Install spot weld nozzle (if available) on gun and press it against the top sheet so the top and bottom sheets are tight together. Close trigger and hold it closed until the arc goes out. If a spot weld nozzle is not used, smoother welds will result by moving the welding wire in a small circle during the weld.

D. Burnback Time control provides manual adjustment of the burnback time (0-250 milliseconds) for any selected welding mode. this control should be set as low as possible without the wire "sticking" in the puddle after each weld. Too long of a burnback time may form a "ball" on the end of the wire, or may "flash back" to the gun tip.

E. Run-In Mode is used to adjust the starting wire feed speed. Starting conditions for certain welding applications can be improved with adjustment to the Run-In speed. The control allows for initial starting speeds from 50 - 150 IPM. After the arc is started, the set point on the wire feed speed control will dominate. Note that the Run-in is not functional with the spool gun. Also note that if Run-in is set fully counter clockwise to "OFF", Run-in speed will equal the preset WFS on the machine.

SPOOL GUN

Remove all input power to the POWER MIG 255C before proceeding.

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WARNING

The POWER MIG 255C provides direct connection and use of the Spool Gun (with remote speed control).

It also provides gun trigger switch transfer between the machine’s use with its feeder gun or the spool gun for same polarity welding with different wire and gas processes.

K2297-2	Prince® XL Spool Gun
K487-25	Magnum® SG Spool Gun (requires K2445-1
	Cable Adapter)

K2445-1 Magnum SG Spool gun Control Cable Adapter

Allows the K487-25 Magnum SG spool gun’s 6-pin control cable plug to connect to the Power MIG 255C’s 7-pin spool gun control cable receptacle.

K1738-1 Spool Gun Hanger Accessory

CONNECTING THE SPOOL GUN TO THE POWER MIG 255C

(See Figure C.1)

1.Connect the Spool Gun control cable to the mating 7-pin receptacle in the Power MIG wire drive compartment. K487-25 Magnum SG Spool Gun requires K2445-1 cable 7-pin to 6-pin adapter.

2.Connect the Spool Gun electrode lead to the (+)positive stud with the Spool Gun electrode lead sandwiched between the (+)positive power source electrode lead and the (+)positive stud. Tighten and be careful not to strip the threads.

3.Attach the Spool Gun gas line to the 5/8 Gas fitting on the front of the machine.

4.Attach a Gas hose from the Gas supply to the rear inlet gas fitting on the Power MIG 255C.

POWER MIG 255C