Messer Cutting & Welding K4 Operations Instructions download pdf (Page 48)

4 Description of control M200 / M210 (optional)

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4.9.4 MIG spot-welding function sequence

Fig. 4/7; MIG spots

Spot-welding starts

Torch trigger is operated and held

• Shielding gas is expelled (gas pre-flows).

• Wire feed motor runs at “creep speed”.

• Arc ignites after the wire electrode makes contact with the workpiece, welding current flows.

• Changeover to pre-selected WF speed.

• Wire-feed motor stops after the selected spotting time expires.

• Arc is extinguished after the set wire burn-back time elapses.

• Gas post-flow time elapses.

End spot-welding

• Spot-welding ends when the pre-selected spotting time expires.

• Early ending of spot-welding with the release of the torch trigger.

Release torch trigger: spot-welding can be resumed.

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Messer Cutting & Welding K4 Operations Instructions Page 48