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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:

The best result I obtain is this one :

Pantograph lowered

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

enter image description here

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 :

linkage for a pantogoraph

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 :

linkage for a pantogoraph

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

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  • $\begingroup$ can u show/link a video how it is supposed to work? thanks. $\endgroup$
    – user146132
    Commented Apr 19, 2022 at 8:16
  • $\begingroup$ The perfect movement is here : youtu.be/w_9YgDjfohc Thank's $\endgroup$
    – Naeco
    Commented Apr 19, 2022 at 8:55
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    $\begingroup$ Thank's @Jachym Michal ! How do you make a gif so easy like this ? $\endgroup$
    – Naeco
    Commented Apr 19, 2022 at 14:23
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    $\begingroup$ Hey :). Screen capture with Licecap. I often add gifs in my answers :)) $\endgroup$
    – jachym michal
    Commented Apr 20, 2022 at 8:00

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