Electronic shaft speed monitoring
August 2009
Motion Control & Drives
Speed monitoring of driven machinery is quite common. In multiconveyor systems, for example, it can be disastrous if conveyor A stops and conveyor B does not. There is a trend to replace mechanical speed switches with electronic devices, which is quite simple once some application pitfalls have been overcome. The current speed monitor range from Synatel addresses these problems to provide users with trouble free electronic speed monitoring solutions.
Sensing
Synatel’s PU1DR speed monitor is a complete integrated device in a DIN package. Totally sealed – calibration is achieved magnetically – the unit is designed to provide a fixed 80% under-speed alarm with appropriate time delay. All that is required to set the unit is to apply the calibration magnet at the same time that the machinery is started. This has two effects:
* The normal running speed is established, and the 80% set-point calculated.
* The normal run-up time is established.
The PU1DR accepts power supplies from 12-240 VDC and 24-240 VAC. It is provided with an SPDT relay output for alarm purposes. A two wire version is available in an M30 package.
Installation is the difficult part
A typical installation requires a suitable target, a mounting bracket for the sensor and a safety guard for protection. Synatel has introduced its Whirligig which integrates all these functions in a single package to make things simpler. The Whirligig is fitted to the end of the shaft to be monitored by means of an M12 stud at the rear centre of the round housing. Inside this housing is a multiblade rotor designed to generate 2, 4 or 8 pulses per revolution. A mounting position is provided for the PU1DR, or similar sensor, and adaptors are available for standard M30 proxies. A flexible tail is provided to anchor the assembly to the stationary surround structure.
Magmount is even easier
The use of the Whirligig requires that the shaft to be monitored be drilled and tapped M12 for mounting which can on occasions prove to be troublesome. Magmount overcomes the problem. The Magmount consists of a steel boss drilled M12 to accept the stud on the Whirligig and backed with a super-magnet. The magnet then clamps to the end of the shaft and the assembly is completed in seconds.
The Magmount is of course not suitable for stainless steel shafting.
For more information contact Rod McLeman, Blanes Pressure Solutions, +27 (0)11 422 1749, info@pressuresolutions.co.za, www.pressuresolutions.co.za
Further reading:
Drive solutions helping refurbish the Elleringhausen Tunnel
Motion Control & Drives
RUD Ketten’s Tecdos Omega Drive chain drives are powering the specialised cutting assembly used to refurbish the 1,4 km Elleringhausen Tunnel in Germany, combining linear and radial motion in a configuration that performs reliably under constant wet-cutting conditions.
Read more...
Enhanced manufacturing expertise in large-dimension hydraulic cylinders
Motion Control & Drives
WEBER-HYDRAULIK has expanded its manufacturing capabilities to produce hydraulic cylinders with internal diameters of up to 300?mm, extending its portfolio into large-dimension ballast and support cylinders for demanding heavy machinery applications.
Read more...
High-performance linear guides
igus
Motion Control & Drives
igus continues to expand its drylin range of lubrication-free polymer linear guides, including PFAS-free and EHEDG-certified variants for food safety applications. The tribo-optimised iglidur polymer technology eliminates maintenance while offering corrosion resistance and load capacity up to 600 kg.
Read more...
New motion platform for tube laser processing
Motion Control & Drives
Aerotech has announced the LaserTurn280, a motion platform for laser machining of cylindrical medical device components, offering calibrated accuracy of plus or minus 1 micrometre and designed for integration into high-volume production lines.
Read more...
Functional safety in modern factory automation
Motion Control & Drives
Functional safety in modern factory automation allows machines to operate at controlled speeds or hold axes at standstill rather than shutting down entirely. Kollmorgen’s Safe Motion monitor software now supports additional safety-rated encoder protocols, extending these capabilities to precision and linear motion applications.
Read more...
Improving material handling with autonomous mobile robots
Rockwell Automation
Motion Control & Drives
Autonomous mobile robots offer flexible, AI-driven material handling that adapts to shifting demand, fills labour gaps, and generates the operational data needed to optimise end-to-end facility performance.
Read more...
Sinamics G210 versatile drive for continuous motion applications
Motion Control & Drives
Siemens has expanded its drive portfolio with the Sinamics G210, a versatile converter for continuous motion applications that combines motor openness with modular hardware, software options and flexible communication on a scalable OEM platform.
Read more...
Trends and outlook for actuators in humanoid motion
Motion Control & Drives
The humanoid robotics industry is shifting from prototype development to early commercial adoption, with electric actuators dominating current designs and materials innovation set to define next-generation hardware. IDTechEx forecasts a 47% compound annual growth rate for humanoid unit sales over the next decade.
Read more...
Specialist girder frame trailer solves challenging transformer delivery
Motion Control & Drives
Mammoet used its high-capacity girder frame trailer to transport an oversized Hitachi Energy transformer 130?km by road from Ludvika to Köping Port in Sweden, then completed a RoRo transfer to a heavy-lift vessel bound for China.
Read more...
SEW-EURODRIVE to exhibit energy-efficient automation at Propak Cape
SEW-EURODRIVE
Motion Control & Drives
SEW-EURODRIVE will showcase its MOVI-C modular automation portfolio at Propak Cape, demonstrating how integrated drive and automation technologies can help processing and packaging companies reduce energy consumption and improve production consistency.
Read more...
printer friendly version