K2330-1 - Lincoln Electric Postflow and Burnback Timer Kit for LF-72/LF-74

Optimize Weld Termination with Precision Timing

The Lincoln Electric Postflow and Burnback Timer Kit (K2330-1) is a critical accessory designed to enhance the performance of industrial wire feeding systems. Specifically engineered for compatibility with the LF-72 and LF-74 wire feeders, this kit addresses common issues associated with high-speed wire welding, particularly the phenomenon of electrode sticking and crater formation.

In high-production environments where high wire feed speeds are utilized, the momentum of the wire drive system can sometimes cause the electrode to continue feeding for a fraction of a second after the trigger is released. Without proper burnback control, this excess wire can plunge into the freezing weld pool, causing it to stick. This not only damages the finished weld appearance but can also fuse the wire to the contact tip or the workpiece, necessitating downtime to cut the wire and reset the equipment. The K2330-1 provides an adjustable delay for the power source output shut-off, allowing the arc to remain established just long enough to burn off the remaining wire extension, ensuring a clean break and a ready-to-weld stick-out for the next arc start.

Furthermore, the kit includes postflow timing capabilities. Proper shielding gas coverage is essential not just during the weld, but immediately after the arc is extinguished while the puddle solidifies. By maintaining gas flow for a preset duration after the arc ends, this timer kit protects the hot metal from atmospheric contamination, reducing the risk of oxidation and porosity in the crater area. This dual-functionality makes the K2330-1 an indispensable upgrade for achieving code-quality welds and maintaining the longevity of your consumables.

Installation is straightforward, integrating directly into the control architecture of the LF-72 and LF-74 units. By refining the end of the weld cycle, operators can achieve more consistent results, reduce spatter at the stop point, and eliminate the frustration of stuck electrodes.