The Lincoln Electric K221 Start Controls P.C. Board is a critical accessory designed to enhance the performance of automatic welding operations, specifically those utilizing the NA-3S and NA-4 submerged arc controllers. In high-precision industrial environments, the quality of the weld start is just as critical as the steady-state weld. Standard welding procedures often dictate a single current and voltage setting, which may not be ideal for the initial establishment of the arc. The K221 board bridges this gap by providing a dedicated interface to adjust starting parameters independently from the main welding schedule.
This printed circuit board integrates directly into the control architecture of compatible Lincoln Electric automatic systems. Once installed, it enables the operator to set a starting current and voltage that is either higher or lower than the running procedure. This adjustment is maintained for a settable duration, allowing the arc to stabilize and the weld pool to establish proper wetting and penetration characteristics before the system ramps to standard operating parameters. This capability is essential for controlling bead geometry at the very beginning of the joint, ensuring that the finished product meets rigorous structural specifications.
The K221 is particularly valuable in submerged arc welding (SAW) applications where flux coverage can obscure the immediate start of the arc, making automated parameter control vital. By fine-tuning the start energy, operators can mitigate common issues such as cold lapping at the start or excessive energy input that leads to burn-through on thinner sections. The board is engineered to Lincoln Electric's industrial standards, ensuring reliability and longevity even in demanding manufacturing environments. With a compact form factor of 9.25 x 5.25 x 3.25 inches, it fits securely within the controller housing.
Manufactured by Lincoln Electric, a global leader in arc welding solutions, the K221 Start Controls P.C. Board is backed by a 3-year warranty, providing peace of mind for maintenance and repair operations. It represents a cost-effective upgrade to existing NA-3S and NA-4 setups, extending the capability of older equipment to meet modern quality demands.
| Additional Information |
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| Brand:Lincoln Electric |
| Packaging Description:1 Per Ea |
| Compatible Models:NA-3S Automatic Control, NA-4 Automatic Control |
| Accessory Type:Start Controls PC Board, Automatic Welding Controller Part |
| Function:Adjusts starting current, Adjusts starting voltage, Controls start duration |
| Warranty:3 Years |
| Net Weight:2 lbs, 0.907 kg |
| Dimensions:9.25 in x 5.25 in x 3.25 in |
