Optical measurement and precision microdispensing techniques together can be used for the real-time detection of drop formation, measuring dispensed volume, and process deviations that lead to higher dispensing accuracy.
VERMES Microdispensing, droptical and MOL Solutions have combined precision microdispensing and optical process control to enhance dispensing accuracy. The combined technology makes use of VERMES microdispensing systems along with droptical’s optical measurement techniques to inspect the droplets right away after the droplets leave the nozzle. This technique helps manufacturers in measuring dispensed volume, detecting satellite drops and build-up of materials on the nozzle tip.
The device is based on the use of the contactless micro-dispensing technology of VERMES with the optical measuring system of droptical. The optical technology used analyzes the droplets individually to check the presence of dispensed volume, as well as to measure the dispensed volume and deviations in the formation of the droplets. The technology is capable of assessing rapidly evaporating substances, such as pure alcohol.
The key features are:
- Contact-free microdispensing with optical measurement.
- Individual droplet detection and volume measurement.
- Satellite droplet and nozzle material build-up detection.
- Stroboscopic imaging for light-sensitive liquids.
- Closed-loop optimisation potential through volume-based feedback.
As a tool for process development, the technology makes it possible for engineers to benchmark dispensing parameters, detect any deviations and determine process windows reliably. In some cases, it may minimize the need for sophisticated high-speed camera analysis or allow for better focus on such analysis. Measurement data obtained will also be useful in transferring validated dispensing parameters to manufacturing processes.
In manufacturing processes, the technology provides feedback for each dispensing event, making it possible to detect errors before proceeding further and possibly incur unnecessary costs. Measurement data can also be linked to component and process information for purposes of quality control.
The cooperation between the companies will contribute towards the development of closed-loop dispensing control systems. Based on measurement data, adjustments can be made to dispensing parameters, including process settings and media pressure. VERMES already markets its Drop Volume System+ (DVS+), which is a volume-based solution that facilitates process optimization through closed-loop control. This solution is aimed at industries that demand precise dispensing and process validation in real time, especially those working with delicate liquids in small amounts.
