POSITAL Measuring Wheels: Linear Position and Speed Sensing With Rotary Encoders

MC-4-POSITAL-IXARC-400.jpg

March 30, 2021

POSITAL’s measuring wheel accessories for its IXARC family of rotary encoders enables these devices to make accurate linear motions and position measurements. “Encoders are great for measuring rotation”, comments Andy Zou, Product Manager at POSITAL. “However, for many production processes, measurement of linear speed or position is the key objective. Adding a measuring wheel to a POSITAL encoder produces an accurate and versatile tool for these measurements.” For conveyer belt systems for example, wheel-equipped encoders can provide precise speed and position controls that can be used to synchronize the motion of multiple conveyers in complex material handling systems.

Since the wheel-encoder assemblies make measurements directly from the moving surface, they improve accuracy by eliminating errors due to gear backlash or hysteresis. For cut-to-length applications, wheel/encoder assemblies can measure position directly from the surface of solid materials such as fabric, paper, wire, or sheet metal. In this operation, accuracy will improve productivity by reducing scrap losses. Measuring wheels are available in different sizes, with circumferences of 200 mm, 500 mm, or 12 inches. Four rim treatments are available: knurled aluminum, smooth polyurethane, and two tread patterns for the polyurethane tire.

POSITAL has introduced a new spring-loaded pivot arm mounting system for wheel-encoder assemblies.  Like earlier spring-loaded mounting brackets, this device is designed to minimize slippage by maintaining a steady contact pressure between the wheel and the moving surface. However, the pivot arm can accommodate larger lateral movements of the moving surface. Spring tension can be adjusted for optimal contact pressure between the wheel and the moving surface. In addition, the position of the arm on the spring hub can be reversed, enabling the installer to change the direction of the spring load.

For more information, visit www.posital.com.

Related Articles

  • EV Charging Opportunities for Business: A Primer

    EV Charging Opportunities for Business: A Primer

    January 31, 2023 Electric vehicle charging stations are booming and can be an excellent business opportunity, given the current price of gasoline and Canada’s intention to ban the sale of new gas-powered vehicles. Interested in installing an EV charging station? Guillevin’s experts can advise you. EV Charging Opportunities for Business: A Primer Are you considering… Read More…


Latest Articles

  • EV Charging Opportunities for Business: A Primer

    EV Charging Opportunities for Business: A Primer

    January 31, 2023 Electric vehicle charging stations are booming and can be an excellent business opportunity, given the current price of gasoline and Canada’s intention to ban the sale of new gas-powered vehicles. Interested in installing an EV charging station? Guillevin’s experts can advise you. EV Charging Opportunities for Business: A Primer Are you considering… Read More…

  • Rotary Encoders for Harsh Environments

    January 30, 2023 Rotary encoders are electromechanical devices that provide feedback on the rotational movement of an axle or shaft. Comprising two parts – a reader and a scale – they typically accomplish this task either by either “absolute encoding” or “incremental encoding”: Absolute encoders measure the precise angular position of the reader relative to… Read More…


Featured Article

Access Management for Your Plant and Machinery

With PILZ’s “Identification and Access Management” portfolio, they offer you a comprehensive range of products, solutions and software for the implementation of safety as well as security tasks. Below you’ll discover more about potential applications, from simple authentication to complex access permissions, and access management through to safe operating mode selection, maintenance safeguarding and safeguarding of data and networks. Experience safety and security in one system!

This solution ensures that a machine cannot resume operation while people are still in the danger zone. The maintenance safeguarding system “key-in-pocket” is designed for machines with danger zones, which are protected by a safety fence and which staff need to access – robot cells for example. In comparison with conventional lockout-tagout (LOTO) systems, maintenance safeguarding with the key-in-pocket solution is implemented via RFID keys with corresponding permissions and a safe list in the PILZ controllers. As a result, it provides a purely electronic restart protection and makes both mechanical interlocking devices and warning tags redundant.

Read more


Products