The Sunstone Linear DC welder is a completely unique resistance welding system with closed-loop feedback. Utilizing new patent pending technologies, the Linear DC welder has the power of a High-Frequency Inverter and the precision of a Linear DC. As mentioned, this is a completely unique product. It isn’t an HF welder since it does not require an external transformer, and it isn’t like typical Linear DC welders because it doesn’t use transistors to control the energy output. Yet, this product is able to perform the same functions as both of these technologies, and in most cases it has capabilities that exceed those of other HF or Linear DC welders – offering high repetition rates, fine low-energy control, and short or long weld times – without any of the drawbacks and inconveniences.

Sunstone Linear DC Welder Feature:
- 10″ Touch Screen Interface
- High-Speed Advanced Closed-Loop Feedback
- Pre-Weld and Weld Monitoring
- Fast Rise Times, and Long Weld Times
- Single Phase Power input – 110VAC or 220VAC
- No External Weld Transformer Required
- Fully Automatable
- Updateable Software
- Current, Voltage, and Power Control Modes
The Linear DC welder features many attractive selling points that can cater to a multitude of users. The most visible aspect is the 10″ touchscreen interface which offers quick access to the welder controls. The adjustability and control of the weld settings is greatly streamlined by the intuitive interface, and users can customize the interface to display preferred information and/or controls. Also related to the interface, is the ability to update the welder’s software. This allows users to update features, functions, and capabilities effortlessly. This also means that custom software can be created based on specific customer requirements.


When it comes time to weld with the Linear DC, users have from 10-4000 amps of weld current. The weld time duration can range from 0.1 up to 1000 milliseconds and is also adjustable by 0.01ms increments. In addition to setting weld current, voltage, or power, and the weld time for upslopes, welds, and downslopes, the linear DC welder can introduce high-frequency agitation to each of these weld parameters. This agitation feature provides additional weld penetration, more uniform metal crystallization, stronger weld joints, and can facilitate stronger weld joints with lower overall heat input.
Typical Sunstone Linear DC Welder Applications

Automotive Applications

Battery Packs & Cells

Capacitor Assemblies

Cathode Ray Tubes

Solar Cells

Lamp Assemblies

Heating Elements

Electronic Assemblies
High Force Weld Heads
Ideal for large, thick applications where High Face Applications are required. Adjustable from 1.7 lbs up to 45 lbs of Force. Pneumatic driven for consistent force application & Repeatable Results.


Parallel & Opposed Weld Heads
Sunstone Offers Weld both Parallel & Opposed Weld Heads to complete your welding application. When coupled with the Sunstone Linear DC, provide consistent, repeatable, weld results. Providing a repeatable and consistent pressure in Resistance welding is key to success. Sunstone Weld Heads Provide Just That.
Micro-Weld Head
Designed and built specifically to provide very precise and consistent pressures at forces as low as 3000 Grams. Used for both fixed gap isolated electrodes, or thermocompression Electrodes. The Sunstone Micro Weld head is the perfect solution for welding at the smallest scale.
