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Last revolute in a chain overdefines the assembly.
kees_bijker
Member Posts: 75 ✭✭
Hello all,
I tried looking for this question but somehow non are actually the same and I cannot make sense out of this right now.
In this document I am trying to construct a cable chain from 3 unique parts. One end is fixed, the loose end has a slider mate with offset relative to the fixed end. And then many revolute linked center parts to fit between the two ends.
file is here: https://cad.onshape.com/documents/36a2a3a1b4fc985b5f779dd6/w/cb8bfbfeaa242c42f7c4eda9/e/2e136d1ca8949cfcde5584a7
Every mate works on its own, and combined with each other UNTIL I make the last link of the chain to the other end.
Before this I can rotate each part within its limits, other parts follow as they should. I can slide the second piece as well. Then when you link the loose ends the whole thing turns red with over definitions in all the mates.
I cannot for the life of me figure out why this should be wrong, so I kindly ask for one of the more versed engineers here to look at it for me and hint at what it is that I am doing wrong?
Thanks in advance.
Kees
0
Best Answer
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NeilCooke Moderator, Onshape Employees Posts: 5,627Change the last one to a Cylindrical mate - there will be a planar offset tolerance issue somewhere in the chain.Senior Director, Technical Services, EMEAI0
Answers