With the combination of a large aperture and direct-drive motor, the ALAR series rotary stages makes worm-drive large aperture stages a thing of the past. Now customers can get large aperture rotary stages with zero backlash and no gear wear or gear vibration as is commonly seen in worm-drive stages. The other added benefit is that direct drive is significantly faster than worm drive, so testing can be completed in less time. In production settings, this equates to faster testing, lower cost manufacturing and higher profits. From the standpoint of system accuracy and repeatability, the stage will maintain its performance over time with no need for maintenance because there are no gears to wear out. With higher accuracy and no backlash, customers can produce more accurate products because their test system is now more accurate.
ALAR rotary stages can operate between 45-300rpm, depending on the particular model selected. This speed range is significantly higher than gear-drive stages of similar size.
Angular contact bearings are used to maximize performance with respect to tilt error, moment stiffness and rotating friction. A precision-machined shaft further minimizes tilt error. The design incorporates integral connections that minimize cable issues. The ALAR rotary stages works especially well in applications that require 360° continuous motion but have limited space. The stage is 65-160mm tall and provides smooth motion without travel restrictions.
Performance is assured with encoder line counts from 31000 to 76800 per rev, resulting in resolutions from 0.02arc sec/count to 0.009arc sec/count. The motor and high-performance rotary encoder are directly coupled to a common shaft. The absence of gear trains and mechanical couplings means no position errors caused by hysteresis, windup or backlash. As a result, accuracy of ±2arc sec and bi-directional repeatability of ±0.5arc sec is attainable.
Design Features of the ALAR Rotary Stages Include:
5 different aperture sizes: 100mm, 150mm, 200mm, 250mm, 325mm
Axial load capacity up to 595kg; radial loads to 680kg
Excellent accuracy and repeatability
Cog free motor provides smooth motion
No gear backlash; no accuracy changes over time from gear wear
45-300 rpm continuous rotation speed
Vacuum compatible versions available
Lastek | Laser & Optical Based Photonic Technologies
The Lastek Group of Companies was formed in 1988 and operates today from a large, fully-restored factory located in the University of Adelaide's Commerce and Research Precinct at Thebarton, Adelaide, South Australia. The Group offers a unique set of laser and optical technological resources to the Australian and New Zealand photonics industry. With a staff of over fifteen employees, Lastek brings together a wealth of experience in lasers, optics and complementary technologies.
Lastek is the leading distributor in Australia and New Zealand for many of the world's most advanced laser and photonics companies. Our sales and service personnel, including 3 PhDs, are the most experienced in the industry. We support customers in leading edge applications in diverse fields. These range from fundamental research in physics, chemistry, engineering and biology, to industrial applications of photonics technology, to advanced microscopy and imaging systems, and spectroscopy.
The Groups activities are diverse: in addition to the supply and support of advanced laser and optical equipment; we design and manufacture optical instruments and we undertake custom design and optical project management for a wide range of customers and applications.
Well-equipped workshops and laboratories allow Lastek to undertake design and development tasks, system integration and custom manufacturing project. With in-house expertise in areas as diverse as software development, optical system design, high voltage electronics, opto-mechanical design and fabrication, Lastek have the experience and capabilities to develop advanced optical products, from prototyping to market release.