Description: 【Precision Double Controller】: Spot Welder Machine Time Control Board has a digital display with precisely reading, more accurate and stable encoders adjustment, and longer service life than traditional potentiometers 【Multi function】: Spot Welder Control Board provides adjustable single and double settings, welding count, synchronous triggering and power off saving functions. The 41A thyristor version can control transformer below 1000W 【Enhanced design, easy to install】: Spot Welding Machine Control Board uses double sided welding, optimized component layout, and is easier to install in the machine housing 【Foot pedal anti shaking function】: Spot Welding Equipment 's foot pedal anti shaking function ensures that each press completes a welding cycle, preventing miswelding due to poor switch contacts or other factors 【AC transformer requirements】: Transformer Control Board must be powered by Ac transformer (12V-17V), and is not compatible for DC power supplies Specification: 1. Time adjustment range, 1# 1-100 (0.01s-1s), Each step is accurate to 10 milliseconds (220v AC has 1 cycle of 20 milliseconds). Current 10%-99%, interval 0-100 (0s-0.5s), 2# 0-100 (0s-1s) current 10%-99%====Set the 2# time to zero, then only the 1# will be triggered 2. Rotate the encoders knob to adjust, press to enter and save, and the numbers will flash when adjusting parameters. Size Chart: 9cmx6cm/3.54inchx2.36inch Package Includes: 1 set Spot Welder Machine Time Control Board Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.