parallel link

[shch]

I am sorry in poor English.
Hello.
I want to hear "parallel link".
When a simulation is begun, these "frame_free" of "model" and "frame_main" come off.
How can I simulate it without coming off ?
And how can I make a tip of leg("foot_tip_target" & "foot_tip") trace "Path" ?
https://www.dropbox.com/s/5d84cz6xwh7di ... e.ttt?dl=0

[coppelia]

Hello,

it seems that you want to do IK with that parallel mechanism, and also, that mechanism should be dynamically enabled. So this gets more tricky, doing these 3 things at the same time: IK+parallel+dynamic. Please read first this post.

Cheers

[shch3]

I have read the "Inverse Kinematics with Closed Loop Parallelogram".
I want to hear two things.
1. Why there is a "~" and "~ dyn" to each of the parts?
2. Why there is a "Spherical_joint0" and "Sphere"?

[coppelia]

1. What do you mean with "~"? Do you mean the naming of the objects?
2. The spherical joint and sphere (and some additional auxiliary joints) are needed to avoid an overconstrained system. Otherwise the mechanism could lock or behave in a strange way.

Cheers

[shch3]

Why there is a "~" and "~ dyn" to each of the parts?
This question is related to the picture of "Inverse Kinematics with Closed Loop Parallelogram".
http://i.imgur.com/qPwvQSn.png

[coppelia]

Well, this is the naming that was chosen. Maybe the best is to try a few of the tutorials before going further, otherwise you might get into a lot of trouble.

Cheers