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Issue Resolving Constraints

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Message 1 of 3
vanagonjon
273 Views, 2 Replies

Issue Resolving Constraints

Screen Shot 2013-10-12 at 1.15.43 AM.jpg

 

I have an issue thats been bugging me all day. I am trying to connect a clevis end from a pnumatic cylinder to a lever arm attached to a pivoting rod. I cannot seem to get inventor to accept the constraint of the clevis pin and pivoting rod mated to the lever arm at the same time without a conflicting contraints error. I analized the DOF's for the clinder and the lever arm and I can see they have the correct rotational freedom to find a solution. I am including a link to download the project folder for anyone that thinks they can help. My ultimate goal is to have a driven constraint for the push rod of the cylinder move the arm, actuating the flap attahed to the pivoting rod.

 

I am using 2013 on a MBP running VMware. 

 

Thanks in advance!

 

https://dl.dropboxusercontent.com/u/31757665/Actuate%20Magnet%20Feeder.zip

2 REPLIES 2
Message 2 of 3
JDMather
in reply to: vanagonjon

Side  Asm.iam needs to be set to Flexable.

 

T1W-13E100000N_Arod.prt needs to have the Flush constraint set to be set to Limits.

 

I would probably uncheck Adaptivity for parts that are adaptive.


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Message 3 of 3
vanagonjon
in reply to: vanagonjon

That got it, thanks! I had been using flexible before but had trouble getting the constraints to mesh in other areas. I thought for some reason that flexible wouldn't be necessary to find the static solution but I was wrong. I set limit on the flush constraint (something ive never done before) and I can manipulate the lever to its limits like I want.

 

The issue I have now is how to drive the motion of the assembly, I can create a driven constant between the rod and the cylinder but that has no importance at the top level since all higher order constraints are suppressed. If I create constraints on the components at the top assembly level my model becomes over constrained. How can I simulate the assembly with out manually manipulating the geometry?

 

Thanks again for your help

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