Search found 8 matches

by KKW
29 Mar 2021, 13:24
Forum: General questions
Topic: Collision object disappear
Replies: 1
Views: 1016

Collision object disappear

Hi, I found an object disappear problem when running simulation, it is as the video shows XhKtDZRRRqM if not reachable, here is the link i have tested several times, the disappearing often occurs a period of time after they first collide. According to a previous topic , i checked mass varies from 1e...
by KKW
29 Mar 2021, 12:32
Forum: General questions
Topic: Collision force too big
Replies: 5
Views: 1314

Re: Collision force too big

Hi coppelia, thanks for your reply, always bring me hope i want to do a surgery simulation, the rope is intent to mimic the 2 arteries around the liver, they would be pushed away by the tool. Since coppeliaSim can't simulate the soft tissue, I want to use a rope to find a possible approximation to i...
by KKW
27 Mar 2021, 04:42
Forum: General questions
Topic: Collision force too big
Replies: 5
Views: 1314

Re: Collision force too big

Hi coppelia, thanks for the suggestion, i have tried the first two, speed from 1 to 0.1, add linear and angular damp for segments and joints however, the result is still not ideal, the joints can't hold the segments and break, the tool was still bounced away but with smaller reaction https://i.ibb.c...
by KKW
25 Mar 2021, 07:54
Forum: General questions
Topic: Collision force too big
Replies: 5
Views: 1314

Collision force too big

Hi, I am doing the interaction between a cylinder shape tool and a rope (built by cylinder shape segments and sphere as joint), https://i.ibb.co/3YVmPSG/tool-rope.png when they collide, the tool is bounced away, i also print out the collision force using sim.getContactInfo in sysCall_actuation() of ...
by KKW
08 Feb 2021, 08:58
Forum: General questions
Topic: Spherical joint controlled by parallel manipulator
Replies: 3
Views: 518

Re: Spherical joint controlled by parallel manipulator

Made a stupid mistake, now everything fine. If someone faces the same thing, add one more passive revolute joint in z direction.
by KKW
05 Feb 2021, 11:51
Forum: General questions
Topic: Spherical joint controlled by parallel manipulator
Replies: 3
Views: 518

Re: Spherical joint controlled by parallel manipulator

Still got the same result: rotating around only x either y, depending on which one has bigger max force. Things I also tried, but failed: 1) all the parts have similar mass 0.1-0.2 and principal moment of inertia / mass 0.1 for x,y,z. 2) deselect the responsible option for all "respondable"...
by KKW
05 Feb 2021, 09:06
Forum: General questions
Topic: Spherical joint controlled by parallel manipulator
Replies: 3
Views: 518

Re: Spherical joint controlled by parallel manipulator

Found the scene error, the objects have collision, let me solve it first and come back to you...
by KKW
04 Feb 2021, 16:54
Forum: General questions
Topic: Spherical joint controlled by parallel manipulator
Replies: 3
Views: 518

Spherical joint controlled by parallel manipulator

Hi coppeliaSim, as the subject said, I am now facing the parallel manipulator setting problem, hope you or other users can help me with it :) here is my scene: https://drive.google.com/file/d/1-thaE7lSYF2n2eWGTvfzX2PkqH4O2WMs/view?usp=sharing , where I set one passive revolute joint for each active ...