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I'm toying with adaptivity now that im becoming more familiar with Inventor but I cant seem to make this work. In the attached assy I have drawn a simple tool balancer made up of three parts, the body, hook, and cable. I have created a pos rep to raise and lower the hook and all that worked great. I thought I would get fancy and make an adaptive cable between the two that would update as the thing gets raised and lowered but I keep getting errors. I must be doing something wrong. If anyone has time I would appreciate the help.
I haven't actually looked at your example but from a seasoned IV user (since IV5), If I were you I would try to forget about using adaptivity if at all possible. Look at using derived parts / skeletal modelling to achieve the same effect with much fewer headaches and much more robust models!
Try replacing the tool cable with tool cable 2.
It's the only way I ever got this type of adaptivity to work.
I think it's because the length is not dimensioned but in an extrusion the extrusion distance is locked.
Unless the tool cable is constructed in the assy and the extrusion is not a distance but is to... or from/to.. using the faces of the other parts where there would be no exact distance.
"the extrusion distance is locked"
"Unless the tool cable is constructed in the assy and the extrusion is not a distance but is to... or from/to.. using the faces "
Not true. You can place a constraint on each end of an extrusion and it will adapt. The key to making this constraint drive is you must check "Drive Adaptivity" in the drive constaint dialog and the extrusion in the part must be adaptive.
I see what you are saying and i tried this but now I cannot set any of the parts in the assy to adaptive. When I right cllick the part in the browser adaptive is greyed out. I think maybe this adaptive stuff should just be avoided and has many problems.
If you forget about using the PosRep, turn on Adaptivity for the TOOL CABLE (RMB > Adaptivity) you can then alter the 25.75" mate constraint and it updates fine. For some reason trying to use the PosRep bit fails, the adaptivity part is working fine.
Then I remembered!!
I see, Thanks for the info. I can now forget completly about using adaptivity. Too many limitations to be useful. You guys on the other hand are very useful !! Thanks for the help.
