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, [email protected], www.pressuresolutions.co.za
Further reading:
Next-gen battery-driven grease gun
SKF South Africa
Motion Control & Drives
SKF’s innovative TLGB 21 battery-driven grease gun optimises lubrication efficiency and reduces costs, by seamlessly combining advanced technology with a smart, rugged design.
Read more...
Autonomous robots provide green logistics
DNH Tradeserve t/a DNH Technologies
Motion Control & Drives
In 2007, Heinrich Amminger and Martin Trummer from Austria had an idea for revolutionising warehouse logistics. They developed the automated small part warehouse – an intelligent and very environment-friendly logistics system that is winning an increasing number of customers for Ylog, a startup company.
Read more...
Precision drives on the Red Planet
DNH Tradeserve t/a DNH Technologies
Motion Control & Drives
More than 100 electric motors from maxon have been used on the Red Planet, and have withstood cosmic radiation, dust storms, and temperature fluctuations. The key to success is standard industrial products.
Read more...
Solar-powered drive solution for water pumps
Schneider Electric South Africa
Motion Control & Drives
Schneider Electric South Africa has launched its Altivar Solar ATV320 variable speed drive (VSD), a solar-powered drive solution that is compatible with a wide range of water pumps, catering for water challenges and decarbonisation of irrigation pumping and agriprocessing machinery.
Read more...
Dependable belt rip detection
Motion Control & Drives
Becker Mining has launched the newly developed BRS4.0 belt rip detection system, with advanced features for greater durability, higher efficiency, and improved safety.
Read more...
Flat face and flat face screw couplings for mining
Motion Control & Drives
Quick couplings are the critical connectors that keep mining systems running. Within the mining industry, the choice of coupling can significantly impact equipment performance, downtime, and maintenance costs. Stucchi offers flat face and flat face screw couplings that are designed to withstand mining’s unique challenges.
Read more...
The importance of original branded bolt securing products
Bearing Man Group t/a BMG
Motion Control & Drives
BMG is concerned about the proliferation of counterfeit merchandise, and the dangers associated with using inferior goods.
Read more...
New-generation drill rig
Motion Control & Drives
Epiroc is launching the new-generation PowerROC T35, offering both increased fuel efficiency and faster operations.
Read more...
Compressed air treatment do’s and don’ts
Artic Driers International
Motion Control & Drives
As a long-established importer and manufacturer of air dryers, Artic Dryers often sees the results of poor installation and issues with aftercoolers that create serious problems in air drying systems.
Read more...
Understanding standby, prime and continuous gensets
WEG Africa
Motion Control & Drives
The increasing reliance of South African businesses on generator sets to mitigate power disruptions highlights a crucial need for proper selection based on specific operational demands. Despite their growing usage, there is still widespread confusion about how to choose the appropriate genset, often leading to inefficient and costly decisions.
Read more...
printer friendly version