Cranes and construction

Cranes and construction

Cranes and construction

Product catalog summary
Overview: The document discusses the design and application of geared cam limit switches, particularly in crane and stage equipment, highlighting their importance in ensuring safety and operational efficiency. It also covers the integration of encoders for enhanced functionality.
Specifications: The geared cam limit switches are designed for high accuracy in positioning cranes, reliability in rough environments, and safe operation. They operate within a wide temperature range of -40 °C to +80 °C.
Functionality: These switches are integral to cable winches, translating shaft turns into cam-disc rotations to control mechanical switch contacts. This ensures emergency shutdowns and controlled unwinding of winches.
Applications: Initially used in hoisting equipment, these switches are now also applied in theatre and stage equipment due to their mobility and versatility.
Challenges and Solutions: Modern requirements include electronic detection of winch positions, which aids crane operators by providing precise cable length and crane arm height data. Stromag has developed systems that can be retrofitted to existing equipment using assembly-bells with integrated encoder systems.
Encoder Integration: Wachendorff's WDG 58 H encoder was customized to fit Stromag's specifications, offering high accuracy with up to 5000 pulses per revolution. It features a high IP65 protection level and operates reliably in extreme temperatures.
Durability and Maintenance: The encoder supports high radial and axial loads, with a long service life of up to 1010 revolutions at reduced bearing loads. It includes an early warning system for diode light intensity, allowing for timely maintenance.
Installation: The encoder is easily mounted onto the cam gear shaft, with a cable output leading to an external connector. This setup ensures minimal alteration to existing limit switch systems.
Contact Information: For further inquiries, contact Wachendorff Automation GmbH & Co. KG or your local distributor.
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Catalog excerpts

Cranes and construction-1

MflCHENDORFF Automation GmbH & Co. KG • High accuracy in positioning of cranes • High reliability in rough environment • Safe and comfortable operation • Joint design with customer • Wide temperature range: -40 °C up to +80 °C Rugged & Tough

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A custom product is used in conjunction with limit switches Geared cam limit switches have for a long time been an integral part of cable winches. They are constructed in such a way that they reproduce numerous turns of a shaft on the angle of rotation of the integral cam-disc or camshaft. As they move, the individual lobes operate mechanical switch contacts, which for example ensure the emergency shutdown of the winch before the end of the cable is reached, or for slower unwinding of the winch shortly before this point. Geared limit switches are essential component parts of power-operated hoisting...

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se conditions, thanks to its high IP65 protection level. The maximum allowable operating temperature is in the range of –40 °C to +80 °C. The encoder’s permissible maximum shaft loadings are 80 N radial and 60 N axial. The encoder is double-supported. Two precision ball-bearings provide backlash-free support for the encoder. The service life is 109 revolutions at 100% of full rated shaft load and is extended to 1010 revolutions at only 20% bearing load. The infrared LED that is used has a life of around 100,000 hours – a figure normally only rarely achieved in limit switches applications. WDG58...

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MflCHENDORFF Automation GmbH & Co. KG Encoders Image 5 A cam gear and the encoder with assembly-bell Questions? Just call Dieter Schomel +49 (0) 6722/9965-10, send him an E-Mail at [email protected] or call your local distributor. MflCHENDORFF Please contact your local distributor: Wachendorff Automation GmbH & Co. KG Industriestrasse 7 • D-65366 Geisenheim E-Mail: [email protected] www.wachendorff-automation.de

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