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Linear Shaft Motor

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Nippon Pulse’s Linear Shaft Motor is a brushless, high-precision direct drive linear servo motor with a tubular design. The motor consists of a magnetic shaft and coil assembly (forcer), and is driven and controlled by the flow of current.

The Linear Shaft Motor can replace ball-screws, pneumatics, U-shaped motors and other linear motion systems.

Design Concepts of the Linear Shaft Motor

  • Simple: Two parts and a non-critical air gap
  • Non-Contact: No wearing and maintenance free
  • High Precision: Ironless design and all the magnetic flux is used

Linear Shaft Motor Specification Overview

  • Variety of shaft diameters, ranging from 4mm to 100mm
  • Stroke lengths of 20mm to 4.6M
  • Achievable peak force of 2340N
  • Maximum continuous force of 585N

Advantages of Linear Servomotors

The Linear Shaft Motor is a simple, high-efficiency, high-precision motor that requires no maintenance over its lifetime. The servo motor consists of only two parts: a magnetic shaft, and a “forcer” of wound coils. The Linear Shaft Motor offers ultra-high precision because it has no iron in the forcer or shaft, giving you the precision and zero cogging expected in a coreless design while providing the stiffness expected in an iron-core motor.

Because the forcer coil completely wraps around the shaft’s internal magnets, all the motor’s magnetic flux is efficiently used. This allows for a 0.5mm to 2.5mm nominal annular air gap between the shaft and forcer. This air gap is non-critical, meaning there is no variation in force as the gap changes over the stroke length of the device.

Applications for Linear Servomotors

Nippon Pulse’s Linear Shaft Motor can be used in a variety of applications, including pick-and-place machines and dispensing machines. Applications that require smooth, precise movements and high accuracy will benefit from the Linear Shaft Motor. If your application has varying force requirements or low-power/high-efficiency requirements, contact an applications engineer to learn how your application can benefit from the Linear Shaft Motor servomotor.

Applications of the Linear Shaft Motor (LSM)

  • High-speed pick-and-place machines
  • High-accuracy pick-and-place or dispensing applications
  • Scanners that need smooth and precise movements
  • Long-life and low-maintenance expectations
  • Applications that require low power and high efficiency



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