The ViscoDos-4000-2K Touch is a microprocessor-controlled dosing controller purpose-built for two-component (2K) dispensing applications. It drives two ViscoTec progressive cavity dispensers with DC motors, maintaining a user-defined volumetric mixing ratio across the full dosing cycle. A 5.7-inch VGA TFT color touchscreen provides access to recipe parameters—mixing ratio, dosing amount in millilitres, discharge rate in ml/s, and flush shot volume—while continuously displaying process values including pot life countdown, material levels, pre-pressure, and per-component dosing pressure. The controller is housed in a painted steel enclosure rated IP54 and is available in two power configurations: 230 V single-phase for smaller ViscoPro-D/Dm dispensers, or 3×400 V for larger ViscoPro-DTg units.

What process parameters does the ViscoDos monitor during dispensing?

Continuous process monitoring is central to the ViscoDos-4000-2K Touch. For each of the two components, it tracks material supply levels via potential-free contacts with min and pre-min thresholds, pre-pressure at the pump inlet (analog 0.1–10 V or digital sensor), and dosing pressure at the pump outlet with overpressure detection. A pot life timer counts down from application of the mixed material and triggers a flush shot when the working time expires, preventing cured material from blocking the mixer. The controller also maintains a dose counter and operating hours counter with adjustable maintenance notification, and displays all faults in plain text on screen—no cryptic error codes. Signal outputs include a lamp in the cabinet door, potential-free alarm contacts, and an optional external traffic light.

How is the two-component mixing ratio controlled?

The ViscoDos-4000-2K Touch controls the mixing ratio by volume, not by weight or time. Each ViscoTec dispenser is a positive-displacement progressive cavity pump whose output volume per revolution is precisely known. The controller commands each motor at a speed proportional to the target ratio—if a 2:1 ratio of resin to hardener is set, the resin pump turns twice as fast as the hardener pump for the same material volume. Because progressive cavity pumps deliver a near-pulsation-free flow independent of back-pressure, the volumetric ratio is maintained accurately even as material viscosities change with temperature or batch variation. This makes the system suitable for bonding, sealing, potting, and encapsulation applications where stoichiometric ratio accuracy directly determines cured material properties.