How to make a pebble shape in fusion 360? please help

[quentinngkayun]

Could anybody tell me how to create a pebble shape in solid platform ? Any tutorial for this ? 

[g-andresen]

Hi,

take a look at the Form tools

günther

[jeff_strater]

pebbles come in lots of shapes and sizes.  I would start with a quadball and deform it from there with Edit Form:

[quentinngkayun]

Thank you for the tutorial !

However , i would like to the make a accurate technical drawing , so is it possible doing this without using form or surface function? 

[g-andresen]

Hi,

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@quentinngkayun wrote:

 i would like to the make a accurate technical drawing ,

do it this way

günther

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[quentinngkayun]

Hi @g-andresen 

Thank you for your great help Andresen.

But if I want to measure the radius in the technical drawing ,how can I do this in fusion ?

[g-andresen]

Hi,

In construction mode, insert planes at the corresponding positions and create a sketch on them into which you insert the contour at this position with project/intersect.
After saving the construction, activate the corresponding sketches in drawing mode and use them for dimensioning.

Günther

[quentinngkayun]

 I am kinda understand your theory .But I think I am not fully understand how to execute .Could you please send me some reference ( like website or tutorial in YouTube ) ?

[g-andresen]

Hi,

with the screencast it should work

günther

[TrippyLighting]

An arbitrarily curved surface created with a CAD tool such as the surface of a pebble or a human face is not comprised of analytic geometry(lines, arcs, circles etc.), but NURBS surfaces. Those do not have constant dimensions such as a length of a line or the radius of an arc.

Can you explain the purpose of this exercise?