Permanent Magnet Stepper Motor for Valve Control in Coffee Machines and Sanitary Valves

A permanent magnet stepper motor controls liquid flow rate, water temperature and pressure by turning electrical pulses into precise linear motion. In commercial coffee machines and sanitary valve systems, a lead-screw linear stepper motor opens, closes or modulates the valve in small, repeatable increments — no separate gearbox needed.

How a Permanent Magnet Stepper Motor Controls Coffee Machine and Sanitary Valves

Precise, Repeatable Flow, Temperature and Pressure Regulation

Every pulse advances the rotor by a fixed step angle, so valve opening matches the number of pulses delivered. A two-phase stepper motor with a 15° step angle and 0.0254 mm/step lead resolves flow changes far more finely than a solenoid, and returns to the same position every cycle. Backlash of 0.03 mm keeps metered volumes consistent, and because movement is open-loop this high precision stepper motor needs no feedback device.

Compact Linear Motion With Usable Thrust

With the lead screw built into the rotor, the motor delivers ≥35 N of dynamic thrust at 250 pps over a 13.7 mm stroke — enough force inside a coffee-machine brew group or a sanitary mixing valve, where a gearbox would add length and backlash.

Specifications at a Glance

Lead, thrust and stroke are specified per valve. Leison motor builds this permanent magnet step motor with a SUS303 stainless steel lead screw, cold-rolled for a stable surface finish and dimensional accuracy.

Frequently Asked Questions

What motor controls valves in coffee machines and sanitary fittings?

A permanent magnet stepper motor, normally the lead-screw linear type driven in two-phase bipolar mode.

Why a stepper motor instead of a solenoid valve?

A solenoid is open or closed; a stepper motor modulates flow and repeats any intermediate position every cycle — what temperature and pressure regulation requires.

Are these motors suited to hot-water and humid duty?

The PL25L-024-100 is rated -40 °C to +200 °C with Class F insulation and a 500,000-cycle life.

Can thrust, stroke and lead be customized?

Yes — built to the valve specification, and supplied by Leison motor for coffee-machine and sanitary-valve programs.