How to make a smooth (paint)brush

Henk_de_Vlaam

I try to make the brush of a paintbrush. I started making 4 splines and used them for 4 fills as well as for a loft. However, I do not get the surfaces tangent to each other. The 4 surfaces stay 'flat'. Who can help me to  make a smooth (rounded) brush?

https://cad.onshape.com/documents/38e1b581db7e3972b2b9b23d/w/c69e34d7ebda52fdd532e373/e/23b2ef61a6077970f5b17fe0

EvanReese

You're close! I used your guide curves and added an extra cross section in the middle (using a spline). It's usually much easier to get 1 loft feature to be tangent with itself than to get 4 separate surfaces looking smooth. Is this what you're looking to do? 

EvanReese

You're close! I used your guide curves and added an extra cross section in the middle (using a spline). It's usually much easier to get 1 loft feature to be tangent with itself than to get 4 separate surfaces looking smooth. Is this what you're looking to do? 

Henk_de_Vlaam

Hi @Evan_Reese,

Thank you for your answer.

I also tried myself too to add an extra profile sketch to the loft but that did not succeed, the loft did not generate. With your example I found out why. I did not Pierce the profile spline to the two projected curves but to the sketch lines. This because the proj. curves must be selected under Curves in the part section of the feature tree and not in the feature tree itself.

So, I have a smooth brush now.

EvanReese

@H_d_V
Glad it helped!