Posted to News on 20th Feb 2007, 20:33
Low-cost linear positioner promises impressive performance
A new compact, low-cost linear positioning stage with a manual or motorised drive is now available for stock delivery from motion specialist LG Motion Limited. Based upon a well-proven PTFE bearing system with a simple leadscrew drive, the new medium-precision XSlide has a cross-section of just 31mm high x 48mm wide, yet it packs an impressive dynamic load rating of up to 15.9kg with eight travel lengths from 50-750mm.
The design is essentially a smaller version of LG Motion's successful BiSlide positioner featuring a hard-anodised bearing rail with an opposing 45-degree dovetail and an adjustable PTFE liner. The dual-dovetail design allows even load distribution with a notable impact resistance of up to four times the dynamic loading. The low-friction bearing is corrosion resistant and inherently self cleaning.
Available with a hand wheel or with NEMA size 17 or 23 stepper and servo motors, the XSlide has a choice of 1 or 2mm pitch leadscrews in either nickel-plated steel or 303 stainless steel. With a repeatability of 2.5um per 25mm, overall positioning accuracy is 76um per 250mm as standard, with an optional 38um per 250mm higher-precision version also available. The straight-line accuracy for the bearing system is 25um per 250mm.
Both the bearing and leadscrew have easily accessible carriage-mounted preload adjusters to take care of fine-tuning and wear compensation in-situ without the need to remove the payload.
The XSlide uses a simple and efficient cleat mounting system for single stages or X-Y and X-Y-Z assemblies. This cost-saving, flexible feature allows almost any configuration without the need for adapter plates as well as providing a means of payload and fixture mounting for quick and convenient assembly.
A modular construction includes overtravel limit switch options and accessories include cleats, mounting bolts and a special adapter gusset to provide higher rigidity for vertical end mounting.
LG Motion's new XSlide is aimed at medium-precision applications in production, test and research applications where price and performance are important selection criteria. For complete positioning systems, the company supplies a wide range of motion controls and has a complete manufacturing service for customised systems.
