How to sketch this practice print

[Anonymous]

New to Fusion and I'm just teaching myself using prints I found...If someone could show me how to do these angles on this print that would be great...Thanks!

[TheCADWhisperer · Accepted solution]

File>Export and then Attach the *.f3d file of your attempt here.

What are these two obscured dimensions? Especially the Radius?

Hint

[Anonymous]

Here it is...any advise would be great and thank you for the help!

[Anonymous]

sorry missed that part here is a better pic

[TheCADWhisperer]

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@Anonymous wrote:

...any advise 

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You should not duplicate dimensions and should not have any dimensions in your sketch that are not on the original drawing.

Simplify your sketches.

Add Fillets last (or as late as possible).

[TheCADWhisperer]

Make a bit of progress at a time.

[Anonymous]

That was just what I was looking for...Thank you very much for your help!

[TheCADWhisperer]

Once you have given it an honest try - compare against my  quick attempt.

The mark of a true expert is when you can find any errors that I might have made.

[chrisplyler]

Depending on the assumptions made (there is not quite enough info on the drawings for everything) the 22-deg slot angle is NOT quite parallel to the outside face, and thus the tightening screw cannot be exactly perpendicular to both the slot and the outside face.

It IS pretty dang close, and so will probably work as intended regardless, but I wonder if it represents a rounding error in either the 22-deg angle displayed, or the 100mm and 40mm X and Y distances between hole centers.

Anyway, I chose to make the hole perpendicular to the outside face instead of the slot. Here is my version:

https://knowledge.autodesk.com/community/screencast/ff598f2d-5bfb-430d-bf3b-a8c92f796506

[TheCADWhisperer]

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@chrisplyler wrote:

It IS pretty dang close, and so will probably work as intended regardless, but I wonder if it represents a rounding error in either the 22-deg angle displayed

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Yes, I saw that and was tempted to omit the 22° and simply make parallel.

One concern I have is that this is apparently for an employment test and probably graded only by the mass properties.

Hopefully it was graded by actual human checker and the issue could be pointed out to the checker.

Wonder if the OP passed the test.  🤔

[chrisplyler]

If it's an employment test, I wonder if the employer knows the applicant is getting specific lessons over the internet, and whether that would be okay with them. I could see it either way:

1. He cheated!

2. He was resourceful!

[chrisplyler]

I notice your 66mm distance the the upper inside 30mm radius is to the center of the radius on the surface.

While mine is to the center of the radius 2mm below the surface (under the eventual fillet), which I though was what was shown on the drawings.

That makes the top-side angled faces of my part further out than yours.

Also my slot at the 207mm radius assumed the opposite side was a concentric arc, while yours has the opposite side flat.

Also my tightening holes are very closer together than your are, owing to the previously mentioned 22-deg discrepancy and that we each chose a different spot to measure from, and, oddly, different lengths.

So...three differences in our final parts. Otherwise they overlap exactly.

[TheCADWhisperer]

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@chrisplyler wrote:

1. I notice your 66mm distance the the upper inside 30mm radius is to the center of the radius on the surface.

While mine is to the center of the radius 2mm below the surface (under the eventual fillet), which I though was what was shown on the drawings.

2. Also my slot at the 207mm radius assumed the opposite side was a concentric arc, while yours has the opposite side flat.

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1. I didn't spend a lot of time on this, but I thought I had it right.

2. After looking again, I agree that this should be arc on both sides.  When I look at the drawing it looked straight to me, but from a manufacturing standpoint it should definitely be curved.

The more I look at the original drawing the less I like it.  That counterbored hole for the tightening cap screw should be clearance size on the counterbored side of the slot and tap drilled size on the other side of the 22° slot.  Let's see if the OP returns with questions. 

[chrisplyler]

Totally agree on all your points.

I wonder if the employer intentionally was a bit sloppy to see if an applicant would ask the right questions.

[TheCADWhisperer]

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@chrisplyler wrote:

I wonder if the employer intentionally was a bit sloppy to see if an applicant would ask the right questions.

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Unfortunately, I doubt it.

[davebYYPCU]

I missed the non parallel error, all together, just drew it.

I wondered why no thread call out.

JD you have a typo for the tightening bolt lateral position.

I went with curved slot to try and make the routine work, (order of mouse clicks - sheesh) had to edit it back to correct.

Still haven’t got the coloured original faces and fillet chamfers to another colour.  Any clues?

[JDMather]

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@davebYYPCU wrote:

Still haven’t got the coloured original faces and fillet chamfers to another colour.  Any clues?

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You can apply appearances by body, by feature or by face.

[davebYYPCU]

Yep, got a Chamfer to do it, but the next fillet failed,

thanks.

[chrisplyler]

Make sure the selection option is set to Faces.

Drag the desired appearance up into the "In This Design" box.

Ctrl-select multiple faces at a time.

Drag the desired appearance onto the group of selected faces.

[JDMather]

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@JDMather wrote:

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@davebYYPCU wrote:

Still haven’t got the coloured original faces and fillet chamfers to another colour.  Any clues?

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You can apply appearances by body, by feature or by face.

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Apparently I was mistaken.

I cannot find a way to change appearances By Feature in Fusion 360 like I can in Autodesk Inventor Professional.