Search found 84 matches

by RobAtLab
19 Feb 2018, 13:11
Forum: General questions
Topic: Joint (acting as position control motor) only works at fast speeds
Replies: 4
Views: 1646

Re: Joint (acting as position control motor) only works at fast speeds

Sorry, I don't think I quite understand your answer, I'm pretty new to V-REP. My issue seems to be something affecting any situation in which I try to have a series of modules connected and then want a joint in one of them, or an external force acting on one of them, to transmit forces through to th...
by RobAtLab
15 Feb 2018, 15:26
Forum: General questions
Topic: Joint (acting as position control motor) only works at fast speeds
Replies: 4
Views: 1646

Joint (acting as position control motor) only works at fast speeds

I've got a robot weighing about 13kg in my simulation* using the bullet 2.78 physics engine and V-REP 3.5 latest version, which has a child object (amongst other child objects) of a joint with motor enabled and control loo-p enabled, I set this joint to have a max torque of around 8e4 Nm to give ple...
by RobAtLab
05 Feb 2018, 21:40
Forum: General questions
Topic: collision only with the floor
Replies: 4
Views: 2911

Re: collision only with the floor

I've just found myself in a similar situation to this. I have objects that need to be able to go through each other but must respond to the floor, ad I have far more thsn the mask method can handle. Should that contact callback script method still work for the latest V-REP versions? Are there any ot...
by RobAtLab
04 Feb 2018, 20:56
Forum: General questions
Topic: Slotting pin into hole only works when I scale up by 4
Replies: 4
Views: 1421

Re: Slotting pin into hole only works when I scale up by 4

In the end I fixed this. It seems that by using some simplified versions of the meshes, and then making them into compound groups of convex shapes rather than random shapes this fixed itself completely. My pins now slide into the holes perfectly and seem pretty stable over the long term, no weird vi...
by RobAtLab
04 Feb 2018, 20:51
Forum: General questions
Topic: Changing multiple colours at once
Replies: 3
Views: 1418

Re: Changing multiple colours at once

Could you please give an example of the syntax used for that command, I'm just not entirely sure how you specify the various elements of it. Also, where is that command run from? I've written basic lua controllers for robots in V-REP, non-threaded child scripts I think, but I'm not sure how to run c...
by RobAtLab
04 Feb 2018, 20:43
Forum: General questions
Topic: Strange problem with objects slipping out of place, what am I doing wrong?
Replies: 2
Views: 1133

Re: Strange problem with objects slipping out of place, what am I doing wrong?

I've realised that most of my parts are really tiny, and very low mass, as the real robot parts are. I'm going to have a go at changing the internal scaling, perhaps using full scaling, of the physics engine. If that fails I'll try just making up some fictionally high masses and seeing if that impro...
by RobAtLab
03 Feb 2018, 00:19
Forum: General questions
Topic: Strange problem with objects slipping out of place, what am I doing wrong?
Replies: 2
Views: 1133

Strange problem with objects slipping out of place, what am I doing wrong?

I've been trying to simulate a robot with quite a lot of joints (all in force/torque mode) and plenty of compound convex shapes (all dynamic and respondable except a few which are static+non-respondable and used as visual covers for the blockier dynamic/respondable shapes in hidden layers). Right no...
by RobAtLab
02 Feb 2018, 16:26
Forum: General questions
Topic: Changing multiple colours at once
Replies: 3
Views: 1418

Changing multiple colours at once

When editing "appearance of compund shapes" one finds a compoiund shape as a collection of sub shapes, and sees the "Edition of Compund Shapes" dialog box with opotions such as "adjust colour". I have some compund shapes with about 40 shape components to them. I really do not want to have to edit a ...
by RobAtLab
19 Jan 2018, 22:46
Forum: General questions
Topic: Slotting pin into hole only works when I scale up by 4
Replies: 4
Views: 1421

Re: Slotting pin into hole only works when I scale up by 4

Thanks for the tips. I'm not sure if that strategy with dummies would be appropriate though, would it not end up with one robot effectively becoming parent to the other? As for giving up on random meshes there might be a way this could work, if the dummies system forces parenting and becomes inappro...
by RobAtLab
19 Jan 2018, 22:39
Forum: General questions
Topic: What slows V-REP most?
Replies: 3
Views: 1863

Re: What slows V-REP most?

Thanks for those tips,
P.S. any idea about the video rendering thing I mentioned in my post at the start of this topic, is there a way to get videos to be made (however long the making actually takes as depending on the processing power of one's PC) so they play at what would be the real speed?