Search found 8 matches

by jamesp
02 Jul 2019, 09:08
Forum: General questions
Topic: Moving a chain of objects
Replies: 5
Views: 480

Re: Moving a chain of objects

Hi, Sorry for being unclear, it is difficult for me to make a useful MWE scene. The heirarchy goes: robot -> gripper -> force sensor -> nut -> prismatic joint -> revolute joint -> red base Basically, I want the base to behave like it is attached to the nut via a passive screw joint. I will try use d...
by jamesp
01 Jul 2019, 03:33
Forum: General questions
Topic: Moving a chain of objects
Replies: 5
Views: 480

Re: Moving a chain of objects

Hi, thanks for the fast reply! I've uploaded two short videos to https://www.dropbox.com/s/1yo4g1evtsxv9xi/base_dynamics_off.mp4?dl=0 https://www.dropbox.com/s/6daqjwha3yl75ev/base_dynamics_on.mp4?dl=0 "Base" is the red object in the scene. When I disable dynamics in the "Rigid Body Dynamic Properti...
by jamesp
27 Jun 2019, 08:31
Forum: General questions
Topic: Moving a chain of objects
Replies: 5
Views: 480

Moving a chain of objects

Hi, I have an object (A) which is the child of a gripper's attach point. The object A has a dynamically enabled child passive joint, to attach another object (B). When I move the gripper, object A moves as it should, but object B doesn't move even if the movement is orthogonal to the joint's DOF. Is...
by jamesp
05 Apr 2019, 04:31
Forum: General questions
Topic: How to enable Screw pitch
Replies: 4
Views: 551

Re: How to enable Screw pitch

Thanks for the reply!

Is that some kind of global parameter that needs to be set?
I had added a Resolute joint and played with its mode settings under Scene object properties, but the screw pitch field remained greyed out.
by jamesp
04 Apr 2019, 04:04
Forum: General questions
Topic: How to enable Screw pitch
Replies: 4
Views: 551

How to enable Screw pitch

Hi, Really sorry if I'm missing something obvious, but I can't seem to find a way to add a Screw joint. Add->Joint only has Revolute, Prismatic, and Spherical. Revolute joints have a Screw pitch parameter set to 0.0, however it's greyed out so I can't change it there. Having the same issue in 3.5 an...
by jamesp
17 Jan 2019, 04:03
Forum: Bug reports
Topic: How to lock gripper joints?
Replies: 2
Views: 548

Re: How to lock gripper joints?

Thanks for the reply!

A work-around was simply temporarily attaching the fingertip meshes to the force sensor connection point.
Not the most elegant solution, but I can appreciate the complexity behind a model like this.
by jamesp
16 Jan 2019, 05:29
Forum: Bug reports
Topic: How to lock gripper joints?
Replies: 2
Views: 548

How to lock gripper joints?

Hi, I am having a small issue with the Robotiq85 gripper: when the whole gripper is moving, the trailing gripper pad seems to be subject to some kind of inertia or drag effect. https://www.dropbox.com/s/hakji7t9xsvpov1/gripper_loose.png In the above picture the gripper is moving to the left, causing...
by jamesp
04 Dec 2018, 03:38
Forum: General questions
Topic: Can Vrep subscribe 'std_msgs/Float64' type rostopic?
Replies: 2
Views: 584

Re: Can Vrep subscribe 'std_msgs/Float64' type rostopic?

Please post the code in your callback