Ribbon wire fatigue
Ribbon wire fatigue
(OP)
I am pushing the recommended design limit for bending radius on a ribbon wire and would like some information.
Does anyone have a graph of (bending radius)/ (wire radius) verses cycles for ribbon wires? Or some variation of this kind of graph. My tests are running from 1M to 4M cycles on a ribbon cable that should last 100M cycles, if I followed the manufacturer's guidelines (which I can't).
Does anyone have a graph of (bending radius)/ (wire radius) verses cycles for ribbon wires? Or some variation of this kind of graph. My tests are running from 1M to 4M cycles on a ribbon cable that should last 100M cycles, if I followed the manufacturer's guidelines (which I can't).





RE: Ribbon wire fatigue
Most ribbon cable manufacturers don't design their basic ribbon cable for dynamic operations. You may want to look for and specify cables rated for "continuous flex" and/or intended for applications like robotics. Some examples:
http://www.alphawire.com/en/Products/Cable/Xtra-Gu...
http://www.heilind.com/products/molex/news/Molex_T...
http://www.hca.hitachi-cable.com/products/hcm/cata... (see pgs. 7, 19 "Hi Flex", pg 38)
You will need to dig deeper than those links to find recommended bend radii, expected flex life, etc.
RE: Ribbon wire fatigue
RE: Ribbon wire fatigue
You're painted into a corner.
Can you make room for a rotary transformer?
Mike Halloran
Pembroke Pines, FL, USA
RE: Ribbon wire fatigue
You should contact the cable manufacturer to recommend a different cable or fix the improper design issue.
http://www.gore.com/en_xx/products/cables/highdata...