[Adam Y.]

Originally Posted by Pat Roche

I agree with the above posts saying that you are under constrained. Many people, however don't understand why you need to fully constrain your part. The main reason you constrain off the origin is that it allows you to constrain your assemblies easier. Rather than constraining off a side you can constrain off your planes which allow for easier changes (and alot less mental math) later. Also doing this allows easier use of the parameters feature in Inventor. Parameter allow you easily change dimensions of a part and when based off the origin it just gets easier. The easiest way to constrain your part is to go into the 2-D Sketch Panel>Project Geometry then click the two axis you want from the origin tab of the model panel. All thats left is to dimension your part off that.

Hopefully that was helpful,


-Pat

Yes it was. I originally had a hunch that it had something to do with the constraining off the origin because I read it in a tutorial. The only problem was the tutorial mentioned it in passing.

Here is how I would have done the part. Notice that the Feature tree is much more simple.
And note: The holes you used for a 4-40 UNC screw are too big - the screw will fall into the hole as there will be no threads. The screw diameter is .112 and your hole diameter is .112, thus no thread engagement. The correct tap drill size for a 4-40 UNC is a #43 drill (.084"). If you use the Hole tool to create your tapped holes Inventor will automatically assign the correct tap drill size.

Thanks that is much simpler.