4646 - Tecna 4646 20kVA Rocker Arm Spot Welder with TE-101 Control

Industrial 20kVA Rocker Arm Resistance Welder

The Tecna Model 4646 is a high-performance rocker arm spot welder designed for professional industrial applications requiring reliable resistance welding of sheet metal. Rated at 20 kVA, this machine utilizes a high-efficiency transformer coupled with a rigid mechanical structure to deliver consistent weld force and current. The unit operates on a standard 230V single-phase power supply, making it accessible for a wide range of fabrication environments. A key engineering feature of the Model 4646 is its versatile arm configuration; the water-cooled arms are adjustable, offering a throat depth of up to 22 inches. This adjustability allows operators to optimize the machine's geometry for specific workpiece dimensions, ensuring proper electrode access and minimizing mechanical stress on the components.

Control and precision are managed by the integrated TE-101 microprocessor weld control unit. This digital controller allows for the precise regulation of squeeze time, weld time, hold time, and current amplitude, ensuring repeatability across production batches. The machine employs a pneumatic or mechanical leverage system actuated by a two-stage foot switch. The first stage of the pedal engages the clamping mechanism, allowing the operator to verify part alignment and electrode positioning without initiating the arc. The second stage activates the weld current, enhancing safety and reducing the risk of accidental arcs. The entire system is water-cooled, including the arms and electrode holders, which is critical for maintaining high duty cycles and prolonging the life of the copper consumables. The Tecna 4646 is Hydro approved, meeting rigorous safety and electrical standards required for modern manufacturing facilities.