Lincoln Electric SVM 117-A service manual Timer KIT K585-1

C-6 ACCESSORIES C-6

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TIMER KIT (K585-1)

The Timer Kit provides selectable 4-step trigger inter- lock, spot and stitch functions, and manual adjustment of burnback time. This kit installs easily using only a screwdriver. It replaces the blank upper panel on Case Front. It offers the following mode selections:

•The Normal Welding mode provides welding power only while gun trigger is pressed.

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

1.Close trigger and establish welding arc.

2.Release trigger and continue welding.

3.Re-close trigger near end of weld.

4.Release trigger again to stop welding.

•The Spot Weld mode allows a single timed weld cycle each time the gun trigger is held closed. Duration is set with SPOT/STITCH ON TIME knob.

•The Stitch Weld mode allows repeated timed weld cycles while gun trigger is held closed. Weld on- time is set with SPOT/STITCH ON TIME knob, and weld off time is set with STITCH OFF TIME knob.

The BURNBACK TIME knob is used to manually set arc power delay at the end of any above selected weld mode to prevent wire sticking in the weld. With the Timer Kit not installed, a preselected delay is automat- ically set by the machine.

TIMER KIT INSTALLATION (OPTIONAL K585-1)

WARNING

Remove all input power to the WIRE-MATIC 250 before proceeding.

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1.Verify that the following items have been included in the kit:

a.Timer Board and Panel Assembly.

b.Two sheet metal screws.

c.Wiring harness.

2.Turn the POWER SWITCH to OFF.

3.Disconnect AC input power to the machine.

4.Remove the Cover Plate Assembly from the front of the machine by removing the two screws which fasten it using a screwdriver, a 5/16" (8mm) nut dri- ver, or other suitable tool.

5.Reach through the exposed panel opening and attach the rectangular 8-pin plug connector on the Timer Kit wiring harness to the available mating receptacle connector on the upper left corner of the Control Board inside the machine.

a.Be sure that the latch on the connector is aligned with that on the Control Board and insert it until the latch engages.

b.Check that the remaining connector on the opposite end of the wiring harness is firmly attached to the mating connector on the PC Board on the Timer Kit panel, and that the latch is engaged.

6.Align the Timer Kit panel so you can carefully insert the printed circuit board and wiring harness through the opening in the front panel.

a.Make sure the wiring harness is not pinched between panels or between printed circuit board and front panel.

7.Fasten the Timer Kit assembly with either the two supplied screws or with the original screws to com- plete the installation.

WIRE-MATIC 250