An innovative "Legacy" for Eversys coffee

About Eversys

Eversys is one of the most innovative manufacturers of fully automatic coffee machines and a master in creating “True Espresso with a touch”. Driven by its passion for the best espresso quality, Eversys pushes the boundaries of automated coffee beverage preparation.

“In Angst+Pfister Sensors and Power, we have found an innovative manufacturing partner we can rely on in every situation. Their quick responses and technical competence are of particular importance in our collaboration.”

Jonathan Besse, Head of Development at Eversys

Solution

The ceramic grinding disks are driven by a powerful and quiet electric motor, which was jointly developed between Eversys and Angst+Pfister Sensors and Power. Electronic control and monitoring of the machine improve quality and constantly maintain the optimum grinding process. The customer can enter the desired amount of coffee and water, as well as the brewing time, and the grinder is automatically adjusted to achieve the best grinding result. The grinder adjustment is achieved by a stepper motor also provided by Angst+Pfister Sensors and Power.

Different requirements for different uses

End customers wish to produce a maximum number of coffee servings per hour with minimal space requirements.

Motor requirements: the motor must be compact and mechanically integrated into the grinding system. Reducing the number of components within the grinder was one of the goals.

Solution: the motor bearing also serves as bearing for the grinding unit. The grinder disk fits on the motor shaft, the grinder housing is screwed directly to the motor flange. Compared to machinery industry, the drive can be referred to as “direct drive”. Thanks to the modular structure up to four coffee grinders can be vertically integrated into one coffee machine.
 

End customers wish a low-maintenance and reliable coffee machine.

Motor requirements: the motor must be reliable and maintenance free. An Eversys coffee machine may produce several hundred servings of coffee per day. Therefore, a brushless (BLDC) motor is used – its service life is only limited by the service life of the reinforced bearings. Removing superfluous components (such as the grinding disk bearing) increases reliability.

Eversys requirement: the coffee machine shall be exported in all countries around the world without modifications.

Motor requirements: the motor should be powered by the wide input universal power supply integrated in the coffee machine. A low-voltage BLDC motor is therefore used. The speed/torque curve has been optimized to support the load curve of the grinder.

The end customer wants to be able to choose a precise amount of coffee and water as well as the brewing time.

Due to calibration function, the grinder shall be automatically adjusted to achieve the best grinding result. A cost-optimized, compact, reliable system for adjusting the grinder that is mechanically and electrically easy to integrate had to be developed.

Solution by Eversys together with Angst+Pfister Sensors and Power: a compact, reliable and cost-optimized stepper motor drives a worm wheel which adjusts the distance between the grinding discs. The motor shaft is specially tooled to fit the worm shaft by the customer.