Linear Stepper Motor Manufacturer
We offer various models of linear stepper motors and provide precise, repeatable linear motion with high accuracy, low maintenance, and simple control, ideal for automation, medical devices, and precision positioning applications.
We can also customize product parameters for you:
- Length: 30 mm to 300 mm
- Width: 15 mm to 80 mm
- Step Angle: 0.9° to 1.8° per step
- Holding Force: 5 N to 200 N
- Travel Speed: Up to 100 mm/s to 500 mm/s
Structure
Linear stepper motor has a stator with windings, a moving rotor, and a lead screw or rail for precise linear motion.
- Stator: Contains the windings and creates the electromagnetic fields to drive the motor.
- Rotor(or Forcer): The moving element in contact with the magnetic fields of the stator.
- Lead Screw (for non-captive types): Transforms motion from rotation into linear motion.
- Linear Rail or Guide: Provides the pathway for the motor's linear motion.
- Bearings: Make certain that the lead screw or rotor moves precisely and smoothly.
- Encoder (optional): Provides feedback for precise position control.
By Linear Motion Systems
The motion system of a linear stepper motor involves converting rotary motion into linear motion through a series of precise, controlled steps.
Non-Captive
- The non-captive linear stepper motor's shaft allows versatile mounting options and longer travel distances as it extends beyond the motor body.
- Since the shaft is free to move, external support is necessary to prevent vibration and maintain alignment and precision.
Captive Linear
- The captive linear stepper motor's shaft is within the housing, creating a compact solution with built-in guidance, reducing external support needs.
- The internal mechanism limits travel distance and increases the motor's diameter to accommodate the guidance system.
By Control Method
The control method of a linear stepper motor involves the precise coordination of electrical pulses to move the motor’s shaft incrementally along a linear path.
Pulse Control
- Step Pulses: Linear stepper motors move precisely via electrical pulses, each causing specific movement.
- Pulse Frequency: Pulse frequency dictates motor speed: higher frequencies increase, lower frequencies decrease.
Direction Control
- The direction in which the motor moves is managed by a different signal.
- Changing the polarity of this signal will change the direction of travel.
Microstepping
- This technique divides each step into smaller increments for smoother, precise motion by precisely controlling the current in the motor windings.
Current Control
- Linear stepper motors need precise current control for accurate positioning and to prevent overheating. Chopper or constant current drives regulate the current effectively.
Position Feedback
- Closed-Loop Control: Some linear stepper motors use encoders or scales for precise feedback.
- Open-Loop Control: In simpler applications, linear stepper motors operate without feedback, using step pulses for positioning.
Driver & Controller Integration
- Step Driver: The step driver regulates motor currents using signals from a controller.
- Controller: The controller generates pulses and directions for precise movement profiles and speeds.
From 0 to N - Full Motor Solutions
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Applications
Automated Manufacturing & Robotics
- Employed in automated assembly lines to ensure accurate component placement.
- Robotics applications for accurate movement of robotic arms and grippers.
Medical & Laboratory Equipment
- Employed in medical apparatus like syringe drives and precision pumps.
- Laboratory automation for sample handling and positioning.
3D Printing & CNC Machines
- Essential in 3D printers for moving print heads or build platforms.
- CNC machines are utilized to regulate the motion of cutting instruments and components.
Textile & Semiconductor Industries
- Textile machinery for controlling the position of needles or fabric.
- Semiconductor manufacturing for precise handling of wafers and components.
FAQ
Do linear stepper motors require feedback for accurate positioning?
In simpler applications, they can operate in open-loop mode relying solely on step pulses. However, for enhanced accuracy and reliability, some models use encoders or linear scales for position feedback.
Which aspects need to be taken into account when choosing a linear stepper motor?
Factors include the required linear speed and acceleration, load capacity, power supply requirements, and the need for feedback control.
What considerations should be made when selecting a linear stepper motor?
Regular inspection for wear, lubrication of moving parts if applicable, and ensuring proper electrical connections are essential for maintaining optimal performance.
Can linear stepper motors be customized for specific applications?
Yes, manufacturers often offer customization options for linear stepper motors to meet specific requirements such as different shaft lengths, mounting configurations, and environmental conditions.
