Precision dispensing machine accuracy control core technology-Shenzhen Second Intelligent Equipment

Precision dispensing systems (two-component epoxy dispensing systems) require micron-level precision control in fields such as MEMS, optical communication, camera modules, and wafer-level packaging. This article breaks down the core technologies for precision dispensing system precision control.

I. Core Factors Affecting Dispensing Accuracy

43. Mechanical Positioning Accuracy: X/Y axis repeatability.

44. Z-axis Height Accuracy: Distance control between the needle tip and the workpiece surface.

45. Dispensing Volume Accuracy: Stability of single-dispense volume.

46. Adhesive Consistency: Stability of temperature, viscosity, and pressure.

47. Visual Compensation Accuracy: Calibration error of the CCD vision system.

 

3. Key Technologies to Improve Accuracy

1. Linear motor drive: Replaces the traditional servo motor + lead screw, and the repeat accuracy is improved by more than 50%.
2. Grating ruler closed-loop: Realize nanometer-level position feedback.
3. Piezoelectric jet valve: Non-contact alternative for contact dispensing, with a minimum dispensing diameter of 0.1 mm.
4. Constant temperature and constant pressure glue supply system: Adhesive viscosity fluctuation is controlled within ±2%.
5. Vision + laser height measurement: Automatically compensate for workpiece deformation and placement errors.