Lift motor

RLS is a leading manufacturer and supplier of magnetic encoders for the AGV industry. With a wide range of design variants, industry standard output options, RLS encoders offer easy installation and reliable operation for years.

Urbanisation of the cities requires more and more elevators.

Automated guided vehicles or driverless transport systems are used for heavy-duty tasks that are normally handled by forklifts, conveyor systems or manual carts for moving large quantities of material repeatedly. AGVs are used in a variety of applications in the automotive industry, logistics, smart warehouses, food and beverage, pharmaceutical and printing industries.

Challenges of AGVs


In order to have the AGV to be able to determine the exact position when loading/unloading/stacking the material, an encoder has to give accurate position. Once the AGV needs to be adjusted by the operator, it will waste time, resulting in low efficiency and even affecting the entire manufacturing process. RLS magnetic encoders can achieve an accuracy of 0.5°.

Compact design and easy installation

The encoders need to be compact. For example, many forklifts are designed to be very compact to meet the requirements of modern logistics facilities; many embedded AGVs are low and compactly designed to meet the requirements of smart warehousing. Easy installation in the drive system is also an advantage.

Shock and vibration resistance

When AGVs operate in the plant or warehouse, they inevitably cause certain shocks and impacts due to uneven floors and messy objects. Therefore, the selected encoder must be highly resistant to shock and vibration to maintain its accuracy in the complicated environment.

How they work?

AGV drive units typically consist of a servo motor, a speed reducer, brake and tires and require an encoder to control the movement, steering and stopping of the vehicle. In speed monitoring, especially in combination with safety laser scanners for safeguarding danger points, the encoders are an essential component of a vehicle with a safety function.

Each axle/wheel of the AGV is steered around its axis by the torque difference between two motors. Closed loop control is achieved by angular position feedback from each axle drive. Magnetic encoders provide excellent position feedback in high-speed, high-dynamics applications. Due to their non-contact operation they are extremely reliable and thanks to IP68 protection they can also be used in dusty environments.

Why RLS magnetic encoders?


  • Best-in-class quality and reliability achieved through superior design and manufacturing processes.
  • Sine/cosine feedback is available as a standard type of motor position feedback.
  • Robust design, suitable for demanding AGV environments.
  • Encoder protected to IP68, against possible ingress of dust and water.
  • Compact size and high performance make RLS encoders easy to install even in confined spaces.


  • Collision avoidance
  • Speed and direction control
  • Mast height and fork positioningt