Anti-backlash actuators
2nd Quarter 2011
Electrical switching & drive systems & components
Backlash occurs when the motor driving an actuator reverses its load direction. If there is a gap between the lifting screw and the worm gear thread, detrimental screw movement occurs. Typical load-reversing applications where vibrations produce constant movement between the screw and lifting nut are in satellite tracking, plastic and sheet metal processes. This damages the threads and causes premature wear.
Anti-backlash actuators are commonly used to enhance satellite tracking along the X,Y and Z axes and to protect against wind shear
To reduce screw to nut backlash to a minimum, Duff-Norton developed a range of anti-backlash actuators featuring a separate anti-backlash nut. These offer smooth, precise motion control and reduce worm gear wear. They also play a dual role as an internal load safety device. They have the ability to lock and hold a load, thereby eliminating the need for brake motors.
The design allows the backlash to be adjusted to the minimum practical value. As wear occurs, the actuator can be easily adjusted, without any disassembly, to maintain the backlash at its original minimum value.
When an actuator is under load, the lifting screw threads are supported by the worm gear threads. The anti-backlash nut is pinned to the worm gear and adjusted downwards by the shell cap, forcing the bottom thread surfaces against the upper thread surfaces of the lifting screw. Thus backlash between the lifting screw and worm gear threads is reduced to a minimum.
For more information contact Kevin Hoy, Yale Engineering Products, +27 (0)11 794 2910, [email protected], www.yalejhb.co.za
Further reading:
New generation low power frequency inverters
Bearing Man Group T/A BMG
Electrical switching & drive systems & components
New to BMG’s electromechanical range are energy-efficient Synergy PI150 series frequency inverters, which have been designed for efficient use in many applications.
Read more...
Planar motor system for quality assurance
Beckhoff Automation
Editor's Choice Electrical switching & drive systems & components
Achieving the shortest possible inspection times, even when working with different components, is paramount when it comes to series production. This is precisely what special machine builder, stoba Sondermaschinen set out to achieve with its InspectorONE optical inspection system, which is based on deep learning and features the Beckhoff XPlanar planar motor system at the conveyor system core.
Read more...
Siemens elevates automotive and aerospace simulation
Siemens South Africa
Electrical switching & drive systems & components
Siemens Digital Industries Software has announced the latest update to its Simcenter portfolio, delivering advancements in aerostructure analysis, electric motor design, gear optimisation and smart virtual sensing. These enhancements are designed to streamline workflows, accelerate certification and provide deeper insights into system performance.
Read more...
Turbomachinery controls: the call of duty
Schneider Electric South Africa
Electrical switching & drive systems & components
There’s a lot to be said about the unsung heroes of this world; those men, women and machines that deliver such important functions, often overlooked and recognised. One such machine is turbomachinery, and while the name does sound quite obvious to the layman, its rich history and daily functions are not.
Read more...
More movement in the market
Electrical switching & drive systems & components
Aerotech aims to revolutionise the market for precision motion and machine controls with an intuitive control platform.
Read more...
Motion technology for all types of automation
Bearing Man Group T/A BMG
News & events Electrical switching & drive systems & components
BMG has been appointed by The Timken Company as a distributor in southern Africa for the Rollon linear motion guidance system.
Read more...
Servo motor series for explosive environments with expanded certification
Parker Hannifin - Sales Company South Africa
Electrical switching & drive systems & components
Parker Hannifin’s ongoing commitment to safety and performance in hazardous environments is evident in the new certifications and product improvements for its EY and EX servo motor series.
Read more...
The world’s most powerful worm
Editor's Choice Electrical switching & drive systems & components
Geothermal energy from the natural heat of the Earth is an inexhaustible resource, yet the growth of the global geothermal power sector lags behind other renewable energies. Now Swiss startup, Borobotics is hoping to speed this up with its innovative new electric-powered geothermal drilling robot, which can be used to fast-track and lower the cost of heat pump installations in confined spaces.
Read more...
The impact of gearless mill drive technology on CO2 emissions
Electrical switching & drive systems & components
ABB has released an in-depth white paper detailing the vital role that gearless grinding technologies can play in driving productivity in mining while simultaneously reducing their carbon footprint.
Read more...
Revolutionising TIG welding for aerospace manufacturing
Electrical switching & drive systems & components
Yaskawa Southern Africa has partnered with Aerosud Aviation, a leading aerospace manufacturer, to implement a cutting-edge robotic TIG welding solution tailored to the exacting demands of aerospace production.
Read more...
printer friendly version