Stud8 primitive

[Peter Blomberg]

Currently, the stud8.dat primitive (Duplo hollow underside stud) results in a too thin cylinder. Widely used, yes, but the thinness leads some parts authors to use the stud4.dat primitive instead. The stud4 primitive produces a cylinder wall thickness comparable to the 4 LDU of most walls. Compare e.g. the undersides of 15515, 98220, 31066, and 15516.

The real parts have most curved walls slightly thinner than the 4 LDU of rectangular bricks, whereas the underside stud cylinder walls are even thinner, but not as thin as the current stud8 primitive.

What do you think about updating the stud8 primitive to having a slightly thicker wall? Perhaps 3 LDU instead of the current 2 LDU?

   

[Philippe Hurbain]

Currently, the stud8.dat primitive (Duplo hollow underside stud) results in a too thin cylinder. Widely used, yes, but the thinness leads some parts authors to use the stud4.dat primitive instead. The stud4 primitive produces a cylinder wall thickness comparable to the 4 LDU of most walls. Compare e.g. the undersides of 15515, 98220, 31066, and 15516.

The real parts have most curved walls slightly thinner than the 4 LDU of rectangular bricks, whereas the underside stud cylinder walls are even thinner, but not as thin as the current stud8 primitive.

What do you think about updating the stud8 primitive to having a slightly thicker wall? Perhaps 3 LDU instead of the current 2 LDU?

Yes, wall is close to 3LDU. Changing the stud8 prim is easy, problem is that changing stud8 requires quite a bit of work on parts where the stud8 (or stud8a) is not used under a flat surface...

[Gerald Lasser]

69 parts use stud8
21 parts use stud8a

[Peter Blomberg]

Neighboring reinforcements would also need to be reworked.
I see that modifying the primitive is not going to happen in one burst of activity.

What about creating another primitive and adapt part designs one by one over a longer stretch of time until no part uses the old primitive?
I counted the number of parts to be 108. Perhaps I counted some parts twice. This is still a manageable number and I (or other amateur parts authors) get something easy to do while learning the ropes.