Factors contributing to the precision of hot melt adhesive dispensing machine include:
- Drive Systems: Precision stepping motors or servo motors combined with synchronous belts or ball screws are commonly used for precise movement and positioning.
- Positioning Accuracy: High-end models can achieve ±0.02mm to ±0.025mm in XYZ positioning accuracy.
- Repeat Positioning Accuracy: Repeatability is crucial for consistent results, with values often in the range of ±0.01mm to ±0.02mm for screw drive systems.
- Control Systems: Sophisticated control systems, including PLC and touchscreen control, along with user-friendly teach pendants, facilitate accurate programming and execution of dispensing paths.
- Dispensing Control: Technologies like Dynamic Shockwave Technology (DST) in some specialized systems optimize valve performance for precise dispensing of ultra-fine dots or lines, even with small volumes like 0.3nL.
- Nozzle Design: Precision-machined nozzles and flexible nozzle designs ensure accurate glue application and control of line widths, with some models achieving line widths of 0.17mm.