I tried to animate a pantograph just for fun, but it didn't work. I have tried lot of ideas particularly with the observation of these pages:

• How can a mechanical linkage with a closed loop be rigged?

• https://blenderartists.org/t/animating-a-rigid-linkage/685592

The best result I obtain is this one :

But there is still a mistake, the pantograph bow does not keep a vertical position.
The root bone to make the animation is this one selected on the picture.

The perfect movement is here : https://youtu.be/w_9YgDjfohc?t=55

Here is the Blend file: http://www.wfr.zone/w/blender_animation_images/pantographe_pli%C3%A9.blend

I tried to animate a pantograph just for fun, but it didn't work. I have tried lot of ideas particularly with the observation of these pages:

• How can a mechanical linkage with a closed loop be rigged?

• https://blenderartists.org/t/animating-a-rigid-linkage/685592

The best result I obtain is this one :

But there is still a mistake, the pantograph bow does not keep a vertical position.
The root bone to make the animation is this one selected on the picture.

The perfect movement is here : https://youtu.be/w_9YgDjfohc?t=55

Here is the Blend file: http://www.wfr.zone/w/blender_animation_images/pantographe_pli%C3%A9.blend

It seems that it should be a perfect four-bar linkage in order to work. I have try with linkage2 software, and the result show that the cross bar move not vertically with accuracy :

But Blender seems to be able to tolerate such imperfection, no ?

It seems that it should be a perfect four-bar linkage in order to work. I have try with linkage2 software, and the result show that the cross bar move not vertically with accuracy :

But Blender seems to be able to tolerate such imperfection, no ?

I tried to animate a pantograph just for fun, but it didn't work. I have tried lot of ideas particularly with the observation of this pages:

• How can a mechanical linkage with a closed loop be rigged?

• https://blenderartists.org/t/animating-a-rigid-linkage/685592

The best result i obtain is this one :

But there is still a mistake, the pantograph bow does not keep a vertical position.
The root bone to make the animation is this one selected on the picture.

The perfect movement is here : https://youtu.be/w_9YgDjfohc?t=55

Here is the Blend file: http://www.wfr.zone/w/blender_animation_images/pantographe_pli%C3%A9.blend

Thank's !

I tried to animate a pantograph just for fun, but it didn't work. I have tried lot of ideas particularly with the observation of these pages:

• How can a mechanical linkage with a closed loop be rigged?

• https://blenderartists.org/t/animating-a-rigid-linkage/685592

The best result I obtain is this one :

But there is still a mistake, the pantograph bow does not keep a vertical position.
The root bone to make the animation is this one selected on the picture.

The perfect movement is here : https://youtu.be/w_9YgDjfohc?t=55

Here is the Blend file: http://www.wfr.zone/w/blender_animation_images/pantographe_pli%C3%A9.blend

I try to animate a pantograph just for fun, but it doesn'nt work. I have try lot of ideas particularly with the observation of this pages  :

How can a mechanical linkage with a closed loop be rigged? https://blenderartists.org/t/animating-a-rigid-linkage/685592

The best result i obtain is this one :

But there is still a mistake, the pantograph bow does not keep a vertical position.

The root bone to make the animation is this one selected on the picture.

The perfect movement is here : https://youtu.be/w_9YgDjfohc

I search the solution to give the blend file in attachment, i come back in few minutes

A few moment later : Here is the file  : http://www.wfr.zone/w/blender_animation_images/pantographe_pli%C3%A9.blend

Thank's !

I tried to animate a pantograph just for fun, but it didn't work. I have tried lot of ideas particularly with the observation of this pages:

• How can a mechanical linkage with a closed loop be rigged?

• https://blenderartists.org/t/animating-a-rigid-linkage/685592

The best result i obtain is this one :

But there is still a mistake, the pantograph bow does not keep a vertical position.
The root bone to make the animation is this one selected on the picture.

The perfect movement is here : https://youtu.be/w_9YgDjfohc?t=55

Here is the Blend file: http://www.wfr.zone/w/blender_animation_images/pantographe_pli%C3%A9.blend

Thank's !