Extruding a sketch from midplane midplane option?

[ajohns70]

I am using Inventor 2011 and am trying to extrude a sketch with the midplane option. This is a cylinder part and I am trying to create workplanes on the outside of the shaft. Does anyone know the the step by step way to handle this? I attached a picture.

[JDMather · Accepted solution]

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@ajohns70 wrote:

 attached a picture.

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Attach the ipt file here.

[johnsonshiue]

Hi! Somehow the DWFx file turns out empty for me. Based on your description, it looks like you need to find out how to create a workplane on a cylinder. There are actually quite a few ways but I am listing the most common two.

#1, Tangent to the cylinder. Imagine a cylinder's axis is on Z axis for example. XZ and YZ planes are passing through the axis. You can launch Workplane command and select the XZ or YZ plane and then pick the cylinder. Inventor will create a workplane tangent to the cylinder (at or near the picked point) and parallel to the selected origin plane.

#2, Offset workplane. Imagine the same cylinder sitting on Z axis. You should already have a dimension defining the radius or diameter of the cylinder. Next, simply drag an offset workplane from XZ or YZ and set the offset distance to the radius.

Let me know if it works for you.

Thanks!

[Dennis_Jeffrey]

I could not open it either. He needs to post the part.

[ajohns70]

Thank you very much for your help. Yes it did help. I think I needed to put the drawing in a zipped folder. Thank you.