drawing the foot in the pod tutorial

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 From:  dlaery
7332.1 
I am trying to draw a part similar to the "pod foot" but it is still not the same so I am having a hard time trying to figure how to proceed.
I am not trying to draw any of the wires sticking out which is a fish hook and a wire form with a "V" hook on the end, or the hook eyelet that is partially showing in the front of the pic. I can draw those and add them later with another program. I just need to draw the teardrop shape solid in the pic.
in the attached file you will see the different pics I "added" to the work space. I put them on different planes thinking that would help but not sure it helped.
I then drew a line around the different shapes to get a profile .
then I put the profiles together to see if I would get an idea what to do, but sadly I haven't had much luck.
I also attached what little progress I have made by using a revolve and then trim the flat side.
I am not happy with my drawing and looking for some advice or a link to a vid that would give me some direction.
On another note, I am interested in upgrading to ver 3 is there anything that would help what I am trying to do?
Thanks,

David
www.hooksolutions.com


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 From:  ed (EDDYF)
7332.2 
David,

Revolve with a trim on the bottom would also have been my first approach.

Your object is not a precise machined part, so we can try a non-precise method.

Create a solid sphere. Select Show Points. Select groups of points with your mouse and move. Use the bounding box handles to spread points symmetrically. Select all points below the "horizon" and use the horizontal alignment tool to make the flat bottom with rounded edges.

This took about one minute to make.

Ed Ferguson




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 From:  Michael Gibson
7332.3 In reply to 7332.1 
Hi David, I don't think there is anything specific in v3 that would help with this in particular.

Sometimes it can be difficult in general to form something that's kind of asymmetrical with only a couple of profile curves.

Does the control point sculpting method shown by Ed above give you a good way to get a better result?

Is your current model with the trimmed revolve relatively close to what you want with just some tuning needed for removing the dimple or is it not really capturing the shape very well? The control point sculpting type method can probably give you more control over your shaping.

- Michael
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 From:  dlaery
7332.4 In reply to 7332.2 
thanks ed, I have tried that and haven't got the same result as you yet. I'll keep trying

David
www.hooksolutions.com

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 From:  dlaery
7332.5 In reply to 7332.3 
the one I drew is probably not close.
the pic is a fishing lure that weighs 3/16 oz. I need to draw one that weighs 1/2 oz. what i usually do is draw the 3/16 and then scale it up to the 1/2 oz.
It needs to be close in size because lead is very dense and it doesn't take much to change the weight.
Next I think I will try to draw this as slices from front to back and then loft. I always have trouble with the ends when drawing these kinds of parts.

David
www.hooksolutions.com

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 From:  ed (EDDYF)
7332.6 
David -

I've attached the 3dm file if that helps.

Is this drawing for rendering purposes, or will it be used to machine a mold? The answer may dictate the best approach to take.

Ed Ferguson

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 From:  dlaery
7332.7 In reply to 7332.6 
it is for a mold.

David
www.hooksolutions.com

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 From:  dlaery
7332.8 In reply to 7332.6 
hey thanks for the help.

David
www.hooksolutions.com

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 From:  ed (EDDYF)
7332.9 
David -

I'm not the machining expert here, but I think Rail Revolve is going to give you the simplest geometry.

1) Draw profile curve. 2) Rail Revolve. 3) Boolean diff with straight line. 4) Fillet to create rounded bottom edges.

The trick to prevent the pinching shown in your example is to insure the end points of the profile curve are tangent. If you want to be sure, Show Points, select a pair of points, and use the Horizontal Alignment tool to line them up as shown in red. File is attached.

Ed Ferguson



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