Autodesk Inventor

[#1]

Hello

I am following U-Tube tutorial called "Table plastic video tutorial Autodesk Inventor 2010"

I am up to time stamp 4 minutes. I should be extruding the shape by 1.5 inch.

Although there are lines under lines they are construction lines underneath.

I could do with some help here I can't figure it out why it wont find the part closed to do the extrude.

http://www.youtube.com/watch?v=HV7XZVY94o4&feature=relmfu

I have attached the part too.

Kind regards

A CAD Student.

[#2]

You are doing pretty good so far.  But there are a couple of problems.

When I see repeated dimensions like this - I suspect something wrong.

Also, I haven't watched the video yet, but I suspect those arcs and lines are supposed to be tangent.

[#3]

Typically when things don't extrude it is because the sketch is not completely enclosed.

Even though you are saying the lines under the lines are construction lines I would sugest deleting them

and getting a clean enclosed sketch.

[#4]

OK, just watched the video - that person has not particularly experienced.

[#5]

If I take the time to show you the steps to do this correctly, are you going to stick around to follow the instructions?

[#6]

Step 1 create rectangle and then diagonal line as shown.

Then add coincident costraint between midpoint an origin (don't use the horizontal and vertical constraint as shown in the video, it would work and doesn't really matter in this case, but develop a better technique.  In 2013 there is a centerpoint rectangle to do this for you.  For 2012 there is a centerpoint rectangle Add-in avialable somewhere (a Google search should turn up the download link.))

[#7]

Dimension the rectangle with the dimensions as shown.

Add R.75 fillet to the four corners.

Add vertical 7.75 line as shown.

[#8]

Using crossing window (right to left) select these lines and change to construction.

[#9]

On the next step the YouTube shows this arc as NOT tanget, so we'll assume that is the design intent.

Create a 3-point arc at the endpoints of the fillets as beginning and ending point and the the end of the 7.75 construction line as the third point.

[#10]

Now just fun - dimension this arc (it should already be fully constrained).  See where the YouTube got that silly dimension.

Much easier to type 7.75

Create  the same arc at bottom but just click in space for the third point and then make the two arc Equal (=) constraint/.

(don't dimension, don't mirror)