Search found 6 matches

by louxibai
11 Apr 2019, 23:25
Forum: General questions
Topic: Motion planning RRTConnect: Unable to sample any valid states for goal tree
Replies: 1
Views: 161

Motion planning RRTConnect: Unable to sample any valid states for goal tree

Hi, I'm grasping on object from ground, the motion planning returns those error messages in terminal: Error: RRTConnect: Unable to sample any valid states for goal tree at line 253 in /home/marc/Documents/ompl-1.4.2-Source/src/ompl/geometric/planners/rrt/src/RRTConnect.cpp Info: RRTConnect: Created ...
by louxibai
25 Mar 2019, 18:34
Forum: General questions
Topic: CHILD SCRIPT xxx: abort execution
Replies: 1
Views: 149

CHILD SCRIPT xxx: abort execution

Hi Coppelia, I have a threaded script attached to a robot arm that does motion planning for grasping an object. When the grasping pose doesn't make sense I understand it is not able to find the path, but it looks like after the "CHILD SCRIPT xxx: abort execution " message appear, it doesn't abort th...
by louxibai
11 Feb 2019, 19:24
Forum: General questions
Topic: gripper finger force not balanced
Replies: 1
Views: 259

gripper finger force not balanced

Hi, I build a Franka Emika panda in VREP for simulating object grasping, the original gripper fingers from their CAD file are not the same as the real ones, so I replaced them with a different finger, but when it grasps the Cuboid and lifts it, the two fingers keep oscillating, it is hard to describ...
by louxibai
03 Dec 2018, 00:03
Forum: General questions
Topic: Difference between calculated rotation matrix and getObjectMatrix returns
Replies: 1
Views: 375

Difference between calculated rotation matrix and getObjectMatrix returns

Hello, I have a question about the conventions used in getObjectMatrix. I set a dummy to a target orientation by forming a rotation matrix(because I have the target x', y' and z' vectors), and calculate Euler angles from it, the rotation matrix is: [[ 0.65097799 0.57668171 -0.49362523] [ 0.31322249 ...
by louxibai
19 Nov 2018, 19:29
Forum: General questions
Topic: Object slipping down while being lifted
Replies: 2
Views: 975

Re: Object slipping down while being lifted

Thank you very much for the suggestion, I switch to the RG2 gripper and everything works fine now.
by louxibai
18 Nov 2018, 21:28
Forum: General questions
Topic: Object slipping down while being lifted
Replies: 2
Views: 975

Object slipping down while being lifted

Hello, I'm fairly new to VREP, I'm trying to grasp an object with a Kuka robot and ROBOTIQ-85, but the object being grasped always slipping down, I tried to adjust object mass and texture but had no success. Could you please give me some advice? The scene is here: https://www.dropbox.com/s/h2g63rz1a...