Master Catalog Page 543 Common Flexing Applications

Alpha Wire www.alphawire.com 1-800-52 ALPHA Specifications subject to change. For complete specifications and availability, visit www.alphawire.com. 543 Common Flexing Applications I n applying a cable to a flexing application, you must consider the four types of flexing that may be encounter: Rolling Flex, Bending or Tic-Toc Flex, Torsional Flex, and Variable/Random Flex. Rolling Flex Rolling flex applications include linear motion associated with cable track systems or single axis slide apparatus. The most common type of rolling flex includes cable track systems where the cables are "managed" within an enclosed rolling motion carrier. Bending Flex Bending or tick toc flex occurs when a cable is subjected to repetitive motion at a fixed point in the axis of the cable. The bending moment of the cable is subjected to stress and fatigue from lateral motion in these applications. Torsional Flex Torsional flexing applications occur when the cable is subjected to twisting forces, usually in a circular motion around the central axis of the cable. Robotic and pick/place apparatus are the most common applications subjecting cables to torsional stress. Variable Flex Variable flexing applications are random applications, which may occur in any number of flexing environments. Examples include articulation found in robotics, automated equipment, and hand- held devices. Alpha Wire offers flexible cables products designed specifically for each of these types of flexure. In addition, Alpha's engineering staffcan assist the user in the design of application specific cables to suit specific needs, or in the specification of an existing Alpha Wire product. A close examination of the flex requirements is an important first step in selecting product. Cable Flex Test Capabilities Matrix Flex Test Type Applicable Standard Travel Speed Or Cyclic Rate Length Of Travel Test Specimen Bend Radius Or Mandrel Diameter Sample Population Acceptance Criteria Rolling Cable Track Alpha Rolling Flex 12.5 ft/s; 17 Cycles Per Minute 14 ft 28 ft 4.5" to 6.69" 1 Test Specimen Per Construction Cycles to Failure Bending/ Tic-Toc MIL-C-13777G Section 3.7.2 and Section 4.5.4.1 30 Cycles Per Minute 42"@ 90 degrees 42" 3/8" to 5/8" 3 Test Specimens Per Construction Pass/Fail @ 1000 Cycles Torsional MIL-C-13777G Section 3.7.2 and Section 4.5.4.1 30 Cycles Per Minute 22"@ 90 degrees 66" 3", 4.5", 6", 9" 3 Test Specimens Per Construction Pass/Fail @ 3000 Cycles Technical Data

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