Secondary Pivot Point in Bongo

Dear exports,
I have a part that has to rotate about two axes with different pivot points. Does anyone know how a secondary axis can be added? Or How to add an additional pivot point can be included into the moving part?

Hi,

Mostly an auxiliary object (usually a point) being child or parent does the trick.
Could you please be more specific in how the object is supposed to rotate about 2 axis. Is the rotation simultaneously or in succession? Is the ’part’ connected to others?
Maybe you can show an image, a drawing or a model.

Luc

Luc,

Thank you for getting back to me.

There are two sub-set of parts that are moving together. The sub-set B which has some moving parts in them, is connected to sub-set A, . The sub-set A moving/rotating upward taking sub-set B with them. Once the rotation of sub-set A get to some angle ( ie 75 deg) a part in Sub-set B has to rotation 90 deg.

I have tried a few different way, but did not get results.

image001.jpg

image006.png

image002.jpg

image008.png

Sincerely,

Shahin

Shahin,

I didn’t have to look for an auxiliary object. The rods in you model in fact play that role.
In Shahin 000.3dm (77.0 KB) the green cube is made child of the blue rod. Both are made rotating by means of keyframes. Hierarchy does the rest.
The other 3 rods can be rotated on it’s one.

I hope this is what you are looking for?

Luc

Luc,

Thank you for taking time to build a model. I really appreciate your effort; wow. That is very nice of you.

You are correct, the green cub is child to the bar. However, I have added two components to the model; a Magenta box and a Yellow rod.

The magenta box needs to rotate 90 degree about the Yellow rod axis, when the arms move the green box to the top. I have problem with that!!

Sincerely,

Shahin

image001.jpg

Shahin 000.3dm (104 KB)

No prob. Support is my mission, and a model says more than a thousand words (old chinese proverb).

Shahin 001.3dm (115.2 KB)
Steps taken:

  • Make the magenta box child of the green one.
  • Move the pivot to the centre of the yellow rod.
  • Make the magenta box rotate X by keyframes

If you want the yellow rod to take part; just make it child of the green box.
Or apply the steps above to the yellow rod and make the magenta box child of the yellow rod.

Luc

BTW Welcome to our community.

Luc,

I go the magenta box the do the correct action.

Thank you very much for your help.

Shahin

image001.jpg

Shahin 000.3dm (85.8 KB)

1 Like

Good Afternoon Luc,

I have two problem with my Rhino I cannot solve.

  1. In the attached file, I am trying to setup a sample for a landing gear struts. I have no idea how to make the one of the ram to stay attached the main arm that holds the main arm. They rotate, but I need them to stay together and attached to each other in pivot points. How do I connect them?

  2. The other issue I have is that I cannot get the Bongo tool bar to show us in other tool tables.

I appreciate if you can help me with these items.

Again, I am really sorry to bug you!

Sincerely,

Shahin

Landing Gear.3dm (119 KB)