Application Cases

Experiment Name: Application of the ATA-P2010 Power Amplifier in Performance Testing of Impact-Type Piezoelectric Jet Valve Dispensing Under New Control Strategies

Experiment Focus: Packaging Technology

Experimental Equipment: ATA-P2010 power amplifier, signal generator, impact-type piezoelectric jet valve, high-precision electronic scale, and microscope

Experiment Objective:
To drive the piezoelectric jet system using the power amplifier and verify the dispensing performance of the impact-type piezoelectric jet valve under different control strategies, including adhesive dot quality and bubble content.

Experimental Procedure:
To evaluate the dispensing performance of adhesives under different control strategies, including droplet volume and bubble content, this study established an experimental platform for the new control strategies of the impact-type piezoelectric jet system, as shown in Figure 5.9. The platform consists of a control system, an impact-type piezoelectric jet system, a vision system, and an Olympus STM7 measuring microscope. The control system includes a waveform generator and a power amplifier (ATA-P2010, Aigtek, China), capable of high-frequency wide-voltage output from -20V to 130V at 20 kHz.

The vision system includes a high-speed camera, a high-brightness LED light source, a video display, the impact-type piezoelectric jet system, a macro (close-up) lens, and a fixed bracket. To achieve optimal imaging results, the camera/lens and high-brightness LED light axis are positioned at a slightly inclined angle. The camera captures clear images of droplet ejection and retraction at the nozzle through the macro lens, and the high-speed videos are captured and analyzed using i-SPEED Suite 2.0 software.

Experimental Results:
Experimental verification shows that the optimized Bessel waveform significantly reduces air retraction compared to traditional waveforms, and the number of bubbles is markedly decreased.

Additionally, the variance in adhesive dot length and height under traditional control strategies is greater than that under optimized control strategies. The optimized control strategy better ensures the stability and consistency of adhesive dots.

Parameters of the ATA-P2010 Power Amplifier Used in the Experiment: