|Motion Control Application - Open Screw Drive System Moves Heavy Sound Stage Sets Smoothly, Quickly, and Quietly!
E. Longmeadow, MA --Motion Control -
Problem: Move heavy sets on a sound stage smoothly, quickly, and most importantly quietly! Ball screws specified in the original design proved unacceptable due to the limited length of travel, screw deflection which resulted in a lack of smoothness, and high noise levels. A rack and pinion was also considered but the noise level was also too high and there was no room for a gearbox. Linear motors are quiet however the cost was prohibitive, and a belt system could not handle the heavy loads.
Solution: The new Streamliner Open Screw Drive System from Winner was selected by the production company to move the heavy sets on the sound stage. The Open Screw Drive System sets new standards for: Length of travel, speed, and precision for moving loads along a linear axis
This new drive system consists of a precision ground open screw and two pre-loaded radial ball bearings additionally the open screw drive system is supported by bearings spaced every 250 mm that prevent screws as long as 10 m from whipping even at 5000 rpms. This is in contrast to a closed screw system (ball screw and nut) which are more limited as to length of travel and rpms. The system is quiet as there are no free elements such as the balls in the return tubes of ball nuts.
The Open Screw Drive System is a compact linear stage measuring 125 mm (4.921 in.) wide x 86 mm (3.386 in.) high x 4391 mm (172.874 in.) long and can handle dynamic loads to 500 kg (1102 lbs). The standard stroke length is 4000 mm (157.480 in.) and custom stroke lengths to 10 m (32.8 ft) can be specified.
This new drive system consists of a precision ground open screw and two pre-loaded radial ball bearings additionally the open screw drive system is supported by bearings spaced every 250 mm that prevent screws as long as 10 m from whipping even at 5000 rpms. This is in contrast to a closed screw system (ball screw and nut) which are more limited as to length of travel and rpms.
The guide system consists of two parallel shafts and 8 preloaded radial bearings. In addition to smooth motion, low vibration, low noise (<68db at 3000 rpm), and minimal heat generation the Streamliner Open Screw Drive System is capable of travel speed up to 1.7 m/sec (5.5 ft/sec). and pitch and yaw accuracy over 4000 mm (157.480 in.) of travel is just +/- 0.02 mm (0.00079 in).
LM76 is the Exclusive North American Distributor of a new high speed integrated bearing and drive system featuring +/- 5 micron repeatability, and zero backlash!
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Founded in 1976, LM76 has been a leading designer/manufacturer of linear bearings, slides and linear motion systems. LM76 is renowned for its industry leading Minuteman PTFE Composite linear bearings. LM76 is a leading supplier of precision linear shafting: RC60, 300 Series Stainless Steel, and ceramic-coated aluminum shafting. LM76 also offers several FDA/USDA compliant linear bearings and slides for the food processing, pharmaceutical, medical, and packaging industries.
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For additional information contact Mike Quinn at: LM76, 140 Industrial Dr., E. Longmeadow, MA 01028; Telephone: 413-525-4166, Fax: 413-525-3735 or E-Mail: email@example.com or visit the website at http://www.lm76.com
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