The core principle of a module-driven dispensing machine lies in utilizing high-precision linear modules to
achieve precise positioning and motion control of the dispensing head; by integrating this with a fluid contr
ol system, it executes automated, highly consistent dispensing operations.
1. **Motion Positioning: Precise Module Drive**
Serving as the "motion skeleton" of the dispensing machine, the linear module (such as a KK module) is
driven by servo or stepper motors. Working in conjunction with precision transmission components—such
as ball screws and linear guides—it enables high-precision linear motion across the XYZ axes (and even 5
-axis simultaneous motion).
* Repeatable positioning accuracy can reach levels ranging from ±0.01 mm down to the micron scale, ensu
ring that the dispensing location remains highly consistent for every cycle.
* The module employs a closed-loop control system (e.g., utilizing PID algorithms) to correct deviations in
real-time, thereby guaranteeing smooth motion paths and rapid response times.
2. **Fluid Control: Precise Dispensing Output**
As the linear module drives the dispensing head in motion, the control system—guided by a preset progra
m—regulates the opening and closing of the dispensing valve to achieve precise control over the volume of
dispensed fluid:
* **Time-Pressure Valve:** Controls the dispensed volume by adjusting air pressure and valve opening dur
ation; suitable for low-to-medium viscosity fluids.
* **Screw Valve:** Dispenses a precise, quantitative volume based on the number of rotations of an intern
al screw; ideal for high-viscosity fluids or those containing fillers, offering an accuracy of ±1%.
* **Piezoelectric Jet Valve:** Performs non-contact jetting of minute fluid droplets at frequencies reaching
up to 1000 Hz; typically utilized in semiconductor-grade packaging applications.
3. **Program Coordination: Intelligent Synchronization**
The control system (typically a PLC or PC) centrally coordinates the motion trajectory with the timing of dis
pensing actions. It supports various methods for defining dispensing paths—such as teach-in programming
and CAD file importation—enabling the automated dispensing of complex patterns involving points, lines,
planes, arcs, and other geometries.
Some high-end models integrate a **vision positioning system** capable of automatically identifying the
product's location and compensating for positional deviations, thereby further enhancing overall dispensing
accuracy.
