Stepper motors are a simple and cost-effective solution for applications that do not require position feedback and operate exclusively within the design limits of the motor

Linear stepper motor with 20 mm diameter
offers 8 Nm torque

Nippon Pulse permanent magnet (PM) stepper motors (PF series Tin-Can stepper motors) are firmly established in mechanical engineering and offer many advantages over other types of stepper motors. They have an excellent price-performance ratio and are suitable as a low-inertia, low-resolution, low-cost alternative to hybrid stepper motors in many applications.
As a simple motion system, the PFL (LIN‍EARSTEP®) series of linear Tin-Can stepper motors are available at a fraction of the cost of a conventional rotary stepper motor. The LINEARSTEP® series (distributed by Dynetics) has now been supplemented with a 20-millimetre diameter.

Simple structure,
high performance

The PFL20-24Q4 has a thread pitch of 0.05 mm/step (1.2 mm/rev) and is available with bipolar winding. The usable stroke is between 0 to 30 mm and the maximum torque is 8 Nm. The PFL20 is RoHS compliant, has an effective stroke of 30/60 mm and can reach a force of 6 N at 200 pps. With 24 steps per revolution, the lead screw has a thread pitch of 1.2 mm. The PM stepper motor also achieves a rated voltage of 5 V, a resistance of 33 ohms/phase and an inductance of 12 mH/phase.
The simple structure of LINEARSTEP® motors – just a threaded rotor hub and lead screw – helps save space and reduce costs by requiring fewer components than systems that convert rotary motion into linear motion.
LIN‍EARSTEP® motors are also easy to control and can be ordered with unipolar or bipolar windings and a variety of voltages. In addition to the 20 mm motor size, this motor is also available in 25 mm (with or without latch) and 35 mm diameter sizes. Customisation of Tin-Can linear actuators, including the LIN‍EARSTEP®, is possible.
  Overview LINEARSTEP® series  
  Video: Syringe captive vs hybrid2  
Drive technology

Compact piezoelectric motors expanded to include non-magnetic (AMAG) motors

Piezoelectric motors belong to the group of small motors and use the piezoelectric effect to generate motion. They can operate linearly and rotationally. The principle of a piezoelectric motor is based on a movement of the moving part of the motor (rotor) through a change in the frictional force. This occurs when a voltage is applied to the piezoelectric material. The combination of two out-of-phase voltages induces an elliptical motion whose tangential force component drives the rotor.

Advantages of piezoelectric motors

Piezoelectric motors have a high force per volume or a high torque-to-weight ratio. They do not require holding energy, i. e. they have a high holding force when switched off. They have very good dynamics and short response times. They operate completely silently and without magnetic fields. They are also suitable for vacuum. This mode of operation offers a high power density with good efficiency for small motors. The motor has a simple design and can thus be easily integrated. With appropriate control signals, the rotor moves step by step to the target position – with nanometre precision, without backlash or twisting. The direct drive transmits the generated force completely and locks when switched off, without consuming any power.

Product portfolio

The manufacturer Tekceleo (distributed by Dynetics) produces piezo motors based on the patented WAVELLING technology. They are offered with diameters of 20, 30, 45, 60, 75 and 150 mm. The nominal speeds vary from 10 to 600 rpm. Depending on the motor type, the nominal torques vary from a few mNm to 3 Nm. The motors are available with sensors for speed or position detection or with torque sensors.
Examples of piezo motors
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