Digital lift shaft measurement systems provide highly accurate position feedback

09-09-2022 | Variohm | Test & Measurement

Wachendorff Automation GmbH combines its industrial-grade incremental and absolute encoders with application-specific components as complete digital shaft copying systems for position feedback on elevators and lifts in medium-height buildings and structures. The solution is supported in the UK by Variohm EuroSensor.

With a measurement range of up to 120m, the Silent Move series digital shaft copying systems offer highly accurate position feedback to within 0.02mm and lift speeds of up to 4m/s. For straightforward integration with lift control and regulation systems, users can specify incremental encoders with pulsed output or absolute values covering CANopen, CANopen LIFT, SSI or RS485. ,

Variohm Eurosensor offers the Silent Move lift monitoring range, including all required components for fast and straightforward mounting in lift shafts employed for low-rise residential elevators and home lifts, hydraulic lifts, limited-use/limited- application systems, cargo lifts, construction site lifts and more.

These systems are offered in two basic design formats: a measuring unit comprising the incremental or absolute encoder on a mounting bracket with pulley wheels and a separate toothed belt to attach to a customer-developed mounting arrangement – or as a total measuring system with the measuring unit and all the required parts to mount the belt on a standard lift installation (typically including profile rails and clamps, damping spring mechanism and fittings etc.). The toothed pulley measurement unit, which is optionally equipped for a nubbed belt or timing belt, is attached to the lift car and rolls along the belt, which is mounted between the shaft head and the bottom of the lift shaft and comprises a simple but efficient spring tensioning mechanism. These systems are offered with a circumferential (continuous) belt arrangement or an in-line guided belt. These arrangements provide particularly quiet and smooth running.

These lift monitoring systems are certified by TÜV Germany and, like all Wachendorff measurement devices, are covered by a five-year warranty. Created for compactness and simplicity in operation, they provide optimised noise reduction with long working life. Encoders and all components are resistant to typical lift shaft contamination and are essentially maintenance-free. A broad selection of electrical output and mechanical configuration options allows lift designers and manufacturers an optimised lift motion profile and gentle acceleration/deceleration performance for maximum user comfort. Installation is quick and straightforward for new or retrofitted systems.

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