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Direct-drive precision linear motor stages

Featured Product from PI (Physik Instrumente) L.P.

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V-508 PIMag® Precision Linear Stage
Versatile options for adapting to requirements

Flexible adaption
The construction allows flexible adaption to the requirements. Technically sophisticated and cost-critical applications can be equally served with different travel ranges, drives, and measuring systems. XY assemblies are also possible

PIMag®
PI develops proprietary magnetic motors if positioning systems need to achieve specific performance characteristics that cannot be reached by using drive components currently available on the market, for example, to achieve a high force density or a compact design. The motors developed by PI are identified by the PIMag® brand name.

Direct position measuring
Position measuring is performed with the highest accuracy directly at the motion platform so that nonlinearity, mechanical play, or elastic deformation have no influence on position measuring.

PIMag® linear motor
Linear motors are electromagnetic direct drives. They dispense with mechanical components in the drivetrain and transfer the drive force directly and friction-free to the motion platform. The drives reach high velocities and accelerations.

Ironless motors are particularly suitable for positioning tasks with the highest demands on precision because there is no undesirable interaction with the permanent magnets. This allows smooth running even at the lowest velocities and at the same time, there is no vibration at high velocities. Nonlinearity in control behavior is avoided and any position can be controlled easily. The drive force can be set freely.

Iron core motors are used when forces and accelerations need to be achieved in a limited installation space. The design with iron cores maximizes the magnetic forces and ensures high thermal stability of the drive.

Crossed roller guide
With crossed roller guides, the point contact of the balls in ball guides is replaced by line contact of the hardened rollers. Consequently, they are considerably stiffer and need less preload, which reduces friction and allows smoother running. Crossed roller guides are also distinguished by high guiding accuracy and load capacity. Force-guided rolling element cages prevent cage creep.

Application fields
Industry and research. Measuring technology, photonics and precision scanning in semiconductor or medicine technology

Direct-Drive Linear Motor Stages - High Speed & High Precision - Direct Drive Actuators
Direct-drive, linear stages provide high performance, speed and acceleration over large travel ranges. Direct-drive linear motors are usually based on the electrodynamic (magnetic) principle, but piezoelectric direct-drive motors are another option. These motors are usually based on the electrodynamic (magnetic) principle, but piezoelectric direct-drive motors are another option.  Due to the lack of friction, very good resolution and repeatability is feasible and the lifetime of the direct drive motors is not limited by wear and tear. Linear motor stages are often used in industrial automation applications where throughput and speed are crucial. PI linear motor direct-drive stages are available with ironless (no cogging) and ironcore (higher force) 3-phase motors and voice coil drives (shorter travel ranges). Optical linear incremental encoders or optical linear absolute encoders are integrated to provide position feedback. Mechanical bearings and air bearings for ultra-high precision applications are available.  PI also offers Direct-drive rotary stages.

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About PI
PI is a leading manufacturer of air bearing stages, piezoelectric solutions, precision motion control equipment, and hexapod parallel-kinematics for semiconductor applications, photonics, bio-nano-technology and medical engineering. PI has been developing and manufacturing standard & custom precision products with piezoceramic and electromagnetic drives for 4 decades. The company has been ISO 9001 certified since 1994 and provides innovative, high-quality solutions for OEM and research. The PI group employs more than 1,000 people worldwide in 15 subsidiaries and R&D / engineering centers on 3 continents.