Search found 16 matches

10 Apr 2019, 14:20
Forum: General questions
Topic: import stl file physics
Replies: 1
Views: 77

import stl file physics

Hi Coppelia I imported a stl file to simulate the main body of a robot as it is more complex. The problem is that the physics do not work well compared to the model that is purely made in vrep so I would like to know what I should be careful to change and have good results.I already used the meshlab...
04 Apr 2019, 12:32
Forum: General questions
Topic: complex shapes
Replies: 1
Views: 100

complex shapes

Hi Coppelia!

I am trying to make a complex shape at vrep and I check the manual. I want actually to create half cylinder and then unite it with a rectangular. I see the documentation about cad programmes and the mesh triangles but how will I control inertia and weight
25 Mar 2019, 15:22
Forum: General questions
Topic: Graph measure negative angular velocity
Replies: 5
Views: 167

Re: Graph measure negative angular velocity

No I say it shows only positive in order to understand better I will present you an image with what I mean https://i.imgur.com/dijiYYS.png . As you can observe the model in Matlab displays negative values according to z axis of the robot. The vrep has quite similar,ar values according to the magnitu...
25 Mar 2019, 14:42
Forum: General questions
Topic: Graph measure negative angular velocity
Replies: 5
Views: 167

Re: Graph measure negative angular velocity

Hi I use object:angular velocity(object). Well angular velocity can be negative as it is a vector, so a vector has magnitude and direction. When we have a wheel and rotates according to anticlockwise direction then we consider most of the times positive(Of course a physicist has the liberty to consi...
19 Mar 2019, 14:41
Forum: General questions
Topic: Graph measure negative angular velocity
Replies: 5
Views: 167

Graph measure negative angular velocity

Hi Coppelia! I observed that when I make measurements of mobile robot regarding the angular velocity of the body which belongs to the robot relative to world coordinates frame, the angular velocity is always positive instead being positive when rotates anticlockwise and negative when it rotates cloc...
14 Mar 2019, 19:36
Forum: General questions
Topic: simulation Dynamics explained better
Replies: 2
Views: 335

Re: simulation Dynamics explained better

Well the problem was that the wheels I used at this example were the same material as the main body. (According to the documentation tutorials). So suddenly I tried the already implemented wheels that I modified according to my needs (so I just used only the black material which I suppose simulate t...
13 Mar 2019, 11:59
Forum: General questions
Topic: running scripts
Replies: 1
Views: 104

running scripts

Hi Coppellia I use non-threaded child script to run my simulation. The problem is that I want to use two algorithms which the first must be completed before the second starts. From the moment that the entire script executes iteratively like a giant while loop process, how can I use two controllers i...
15 Feb 2019, 16:56
Forum: General questions
Topic: Smooth floor
Replies: 2
Views: 275

Smooth floor

Dear Coppelia I command the robot to a straight line. Even though it goes straight I graph the angular velocity, which is generally zero and it makes some spikes. I observed this happens when the robot wheels cross the lines of the floor (they act as gaps and they add disturbances to the model). I w...
07 Feb 2019, 14:41
Forum: General questions
Topic: Graph set into radians per second
Replies: 1
Views: 232

Graph set into radians per second

Hi Coppelia I am using a Graph with function Object: angular velocity (), when I plot it in XY curve it shows the velocity in degrees per second, how can I measure in rads per second? Morevover I use Graph with function Object:absolute velocity() in order to graph at XY curve the linear velocity of ...
28 Jan 2019, 14:33
Forum: General questions
Topic: how to resize a castor wheel
Replies: 1
Views: 149

how to resize a castor wheel

Hi coppellia

I want to ask how to resize properly the castor wheel so I can use it in my model.