ESAB MultiPower 460 Pulse Instrukcja Obsługi Pobierz pdf (Strona 31)

SECTION 3 OPERATION

Do not allow metal-to-metal contact between the wire feeder chassis and a metal surface connected

in any way to a welding ground. With such contact, a poor welding ground connection may create

a dierence in potential that sends part of the weld ing current through the safety ground wiring in

the control cable and wire feeder, resulting in burnout of that wiring and/or damage to wire feeder

circuitry. If the safety ground burns out, the opera tor may be exposed to electrical shock hazard.

3.1 OPERATING SEQUENCE

NORMAL

1 . Close gun trigger switch.

— Gas solenoid opens, weld contactor closes, wire feed motor runs at preset wire feed speed, or slow run-in, which-

ever has been selected.

2. Release gun trigger switch.

— Wire feed motor de-energized, brake circuit enabled.

— Anti-stick circuit energized.

— Weld contactor opens.

— Burnback circuit times out

(delay determined by setting of Burnback potentiometer).

— Gas solenoid valve closes. Default post ow time is 2-1/2 seconds.

Spot Weld (Option Installed)

I . Close gun trigger switch.

— Gas solenoid opens, weld contactor closes, wire feed motor runs at preset wire feed speed, or slow run-in, which-

ever has been selected.

— Spot weld timing circuit energized. The timer is not activated until the arc is established. This guarantees the spot

times are consistent.

2. Spot weld circuit times out (interval established by setting of spot weld potentiometer).

— Wire feed motor de-energized, brake circuit eective. Burnback circuit energized.

3. Burnback circuit times out (interval established by setting of Burnback potentiometer).

— Weld contactor opens.

4. Release gun trigger switch.

— Gas solenoid valve closes.

Trigger Lock Weld (Option Installed)

I . Close gun trigger switch, wait until the arc is established and then release the gun trigger.

— Gas solenoid opens, weld contactor closes, wire feed motor runs at preset wire feed speed or Slow Run-In which-

ever has been selected.

— The trigger lock circuit will only become engaged if the arc has been established. If the gun trigger is released

before the arc is established the wire will stop feeding.

2. The arc can be terminated by two dierent methods.

A. Method #1 - Press the gun trigger switch

— Wire feed motor de-energized, brake circuit eective. Burnback circuit energized.

B. Method #2- Break the arc by pulling the gun away from the work.

— Wire feed motor de-energized, brake circuit eective. Burnback circuit energized.

NOTE

The time setting can be overridden by releasing the gun trigger switch at any time during the weld.

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