Digital Spot Welding Controller Board 110V/220V – 40A/100A

$43.28 $58.20

Digital Spot Welding Machine Controller Board

Take full control of your DIY resistance welding projects with this precision-engineered Digital Spot Welding Controller Board. Designed for makers, hobbyists, and workshop professionals, this compact controller board lets you fine-tune welding time and current with ease — delivering consistent, repeatable welds every time.

Key Features

STM8 Industrial Microcontroller: Reliable, high-performance processing at the heart of the controller for accurate timing and current regulation.
Optocoupler Isolation: Strong and weak electrical circuits are fully isolated via optocoupler, ensuring safe and stable operation.
Screw-Free Fast Connection Terminals: Power line and foot switch connections use quick-connect terminals — no screwdriver needed, making setup faster and more reliable.
High-Precision Potentiometers: Independent time and current inputs via single potentiometers ensure precise, repeatable settings.
On-Board Status Indicators: Built-in LEDs for power, state, foot switch, and trigger — working status is always clearly visible at a glance.
Zero-Crossing Detection Circuit: Reliable zero-crossing detection ensures accurate SCR phase-shift triggering for consistent weld quality.
Digital Display Interface: Real-time readout of current time and current settings on the digital display.
Wide Voltage Compatibility: Accepts AC 110V or 220V input, making it suitable for use across different regions and workshop setups.

Technical Specifications

Input Voltage: AC 110V / 220V
Output Voltage: 9V (transformer controller board)
Model Options: 40A / 100A
Time Input Range: 1–50 cycles (1 cycle = 20ms)
Current Input Range: 30–99%
Material: Plastic (red)
Control Method: Silicon-controlled phase-shifting triggering

What's in the Box

1 × Spot Welding Machine Controller Board

Made in Mainland China.

Frequently Asked Questions

Q: Is this spot welding controller board compatible with both 110V and 220V power supplies?

A: Yes, this digital spot welding controller board is designed to work with both AC 110V and AC 220V input voltages, making it suitable for workshops in North America, Europe, and other regions worldwide.

Q: What does the time input range of 1–50 cycles mean for welding?

A: Each cycle equals 20 milliseconds, so the time input range of 1–50 cycles gives you a welding pulse duration of 20ms up to 1 second. This precise control over weld duration helps you achieve the right bond strength for different materials and thicknesses.

Q: What is the difference between the 40A and 100A models?

A: The 40A model is suited for lighter DIY resistance welding tasks and thinner materials, while the 100A model provides higher current capacity for more demanding applications or thicker workpieces. Choose based on the scale of your welding projects.

Q: Does this board include a foot switch?

A: The controller board includes a foot switch connection terminal (screw-free, fast-connect type), but a foot switch is not included in the package. Only the controller board itself is included.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.