Hello, I would like to simulate a clip that is height-adjustable using a metric screw. The thread is intended to be represented using a compression-only support in the Z-direction. However, the calculation fails, and I believe this is because the software assumes that the compression-only support is acting in the X-direction (i.e., along the circular direction of the thread). Should I rather use a point spring with stiffness in the Z-direction, or is it also possible to use a compression-only support correctly? Alternatively, I could model a substitute rod as the thread, define it as a tie contact, and apply a compression-only condition at the bottom of the threaded rod.
Compression-only constraint acts in the direction normal to the selected face. Arrows displayed after applying this constraint indicate that direction and you can also see it if you specify Offset. In the case of a hole, it will be radial direction: https://www.youtube.com/watch?v=yYuvUbu6Sw8
Of course, it only resists compression, as the name suggests.
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ok clear thanks, now is see that there are arrows which i have not seen before.
Whats the best way to simulate the height-adjustable metric screw?
Should i use a point spring or should i make a 3d model with a easy bolt like in the screenshot?
Is it possible to apply a compression-only support to an outer ring instead of a surface (selecting a line)?
No, compression-only support only works for surfaces at the moment.
HI,
Perfect moment for asking. 
¿If I create a boudary layer on the hole, how could I later select that new perimeter small anular surface?
@anys: In Inventor you can use the split surface function
Hi slv and Thanks. I don’t have a geometry below. It’s just the mesh. I have the ring but now I can’t select those surfaces. It happened also before . It’s like the washer contact area created with a boundary layer.
You cannot directly select the washer surface, but you can create it by selecting elements individually. Use More on the selection form.
