{"id":10508,"date":"2021-08-03T08:00:00","date_gmt":"2021-08-03T13:00:00","guid":{"rendered":"https:\/\/blog.misumiusa.com\/?p=10508"},"modified":"2021-10-29T15:37:45","modified_gmt":"2021-10-29T20:37:45","slug":"quabbin-industrial-ethernet-torsion-test","status":"publish","type":"post","link":"https:\/\/us.misumi-ec.com\/blog\/quabbin-industrial-ethernet-torsion-test\/","title":{"rendered":"Quabbin Industrial Ethernet Torsion Test"},"content":{"rendered":"\n

Quabbin provided us with another test report that complements the Rolling Bend Flex Test Report which can be found here<\/a>. This test shows the results of torsional stress on their DataMax\u00ae cables<\/a>. Read on to see how many cycles the cables withstood!<\/p>\n\n\n\n

Introduction<\/h5>\n\n\n\n

Continuous movement applications that force a cable to flex repeatedly will
subject the cable to various types of stress that can degrade performance and cause failure in the field. The most commonly recognized type of flex stress is the act of repeatedly bending a cable back and forth. This back and forth flexing is detailed under separate cover in the Quabbin, Rolling Bend Flex test report<\/a>. However, a rolling bend isn\u2019t the only type of flex stress. The second lesser-known stress called torsional stress can also be at work in a continuous movement application. The focus of this report is torsional stress and the impact on the Quabbin Industrial Ethernet products<\/a>.<\/p>\n\n\n\n

As previously explained in the Quabbin, Rolling Bend Flex test report<\/a>, the testing has been designed to simulate the movement of a robotic arm. If we can use an analogy, the rolling bend flex cycle represents the bending and reaching of the robotic arm as it emulates a human arm bending at the elbow and possibly straightening to extend and grasp something. The scenario covers two of the three types of flex stress yet still leaves us to account for the third, torsional stress. Using the same analogy as above, we would see torsional (or rotational) stress come into play as wrist rotation. Just as a human arm includes a wrist capable of rotation, a robotic arm also needs to accommodate wrist-like motion for positioning tools and\/or to grasp objects. As the \u201cwrist\u201d rotates through the full field of motion, it can twist a control cable up to 360 degrees, similar to the visual picture of wringing out a wet towel. Obviously, these torsional forces must be considered during cable development in order to have a design robust enough to survive the intended purpose. Hence we arrive at the Quabbin Industrial Ethernet Torsion Test.<\/p>\n\n\n\n

Torsion tests were performed on Quabbin industrial Ethernet cables. The test is a 360-degree twist total per cycle (180\u00b0 in each direction) over 34\u201d of cable at 71 cycles per minute.<\/p>\n\n\n\n

Testing Equipment<\/h5>\n\n\n\n