Search found 29 matches
- 04 Dec 2018, 01:59
- Forum: General questions
- Topic: Why does dummies not follow their parent object's motion?
- Replies: 6
- Views: 3370
Re: Why does dummies not follow their parent object's motion?
Hello, in the hexapod example, IK works exactly as with any other dynamically enabled and IK controlled robot: the target dummy is moved to a desired position/orientation, and the tip dummy will follow. Cheers Yeah, I know that. But in the moving process, dummy 'hexa_base' is set to move relative t...
- 28 Nov 2018, 01:21
- Forum: General questions
- Topic: Why does dummies not follow their parent object's motion?
- Replies: 6
- Views: 3370
Why does dummies not follow their parent object's motion?
In general, dummies will follow their parent objects to move, even though they have been set kinematic constraints with corresponding end-effector dummies. But in hexapod.ttm mobile robot tutorial, all of dummies (such as 'hexa_base', 'hexa_footTarget0', hexa_footTarget1', ..., 'hexa_footTarget5') u...
- 21 Nov 2018, 03:25
- Forum: General questions
- Topic: install Vortex on Vrep in Linux
- Replies: 4
- Views: 3122
- 19 Nov 2018, 18:27
- Forum: General questions
- Topic: install Vortex on Vrep in Linux
- Replies: 4
- Views: 3122
Re: install Vortex on Vrep in Linux
Fine. But I have not find the linux version of Vortex on website https://www.cm-labs.com/downloads/. Could you please help me? Thank you so much.
- 17 Nov 2018, 20:55
- Forum: General questions
- Topic: install Vortex on Vrep in Linux
- Replies: 4
- Views: 3122
install Vortex on Vrep in Linux
Hi, I would like to use Vortex physical engine on Vrep in Linux. But I found no Linux version on cm-lab website. Do you know how to solve this problem? Thank you in advance.
- 07 Nov 2018, 20:37
- Forum: General questions
- Topic: Can force/torque control of joint achieve positive and negative motion during one control loop?
- Replies: 2
- Views: 2273
Re: Can force/torque control of joint achieve positive and negative motion during one control loop?
Hello, you can only set the amplitude of the force/torque. The sign is set via the joint target velocity. So set following: sim.setJointForce(handle,math.abs(f)) if f~=0 then sim.setJointTargetVelocity(handle,math.abs(vel)*f/math.abs(f)) end Cheers Thanks for your brilliant tutorial, which helps me...
- 05 Nov 2018, 02:46
- Forum: General questions
- Topic: Can force/torque control of joint achieve positive and negative motion during one control loop?
- Replies: 2
- Views: 2273
Can force/torque control of joint achieve positive and negative motion during one control loop?
In this tutorial, I set a sin function to define a joint force control. But it only move in one direction, so if I do not change target velocity, do you have method to move joint in two direction during one control loop? https://github.com/feig122/force_test
- 07 Sep 2018, 11:19
- Forum: General questions
- Topic: How to get the intrinsic velocity of a prismatic joint?
- Replies: 0
- Views: 12433
How to get the intrinsic velocity of a prismatic joint?
Hi, I have got the current position of a prismatic joint using sim.getJointPosition . But I have not found any other functions in lua to acquire current velocity of a prismatic joint. Could you please tell me? Thanks for your help in advance. In addtion, I would like to change Control properties in ...
- 12 May 2018, 03:19
- Forum: General questions
- Topic: dynamic simulation problem of Stewart parallel mechanism
- Replies: 2
- Views: 1636
Re: dynamic simulation problem of Stewart parallel mechanism
Your stewart platform seems to be quite nice. I don't see any obvious problem. However, make sure of following: The platform has a dimension of almost 1 meter in height. Is that intended? If yes, remember that if you want to move it fast, this can generate tremendous forces in the joints. Most engi...
- 10 May 2018, 02:55
- Forum: General questions
- Topic: The measurement of force sensors in Stewart platform
- Replies: 4
- Views: 1887
Re: The measurement of force sensors in Stewart platform
It is not directly computed by V-REP, but by the used physics engine (i.e. Bullet, ODE, Vortex or Newton). It also of course depends on your mass/inertia settings. Can you post your scene? Cheers Thank you so much. I have post my scence in this problem http://forum.coppeliarobotics.com/viewtopic.ph...