40A Spot Welding Device Control Board

Detailed features of the controller:

• STM8 Microcontroller: The main control core.
• Optocoupler Isolation: Supports both high and low current for safer operation.
• Screwless Connectors: Quick-connect terminals for easier use.
• High-precision Potentiometer: Adjustment of input time and current.
• Status Indicator: Power, status, foot pedal, and trigger codes for easy monitoring.
• Reliable Design: Zero-crossing detection circuit for precise SCR phase shifting.
• Compatibility: Supports 100A fuses.
• Digital Interface: Displays set time and current.
• Color Digital Display: Time and current within 1-50 cycles (1 cycle = 20ms, current 30-99%).

The zero-crossing detection function and the time and current settings provide stable and reliable performance.

Error description:

Time or current is not adjustable, the value does not change.