 | | Re: Control lego motors and rotation sensors
|
|
(...) I'm not so sure about motor design, there are quite a few motors that block (one in ten for me). Since wou use RoboLAB it may rather be the LEGO firmware that protects your motors, it contains code to limit the speed of switching the motor. (...) (23 years ago, 27-Apr-02, to lugnet.robotics)
|
| |
| | 4 Legged Robot; Steering Help
|
|
I am working on a project to build a 4 legged robot. The legs will be fairly articulate although I have not yet figured out how to turn a 4 legged robot. I have read information suggesting to put a turntable in the body, but without a working model (...) (23 years ago, 20-Apr-02, to lugnet.robotics)
|
| |
| | Re: WELCOME to lego-robotics@crynwr.com
|
|
I have yet to see a single problem with RIS 2.0 software on Windows 2000. I have done VB development with the tower/rcx on the same platform. I have used exclusively Windows 2000 for all of my development and robotics without any problems. The only (...) (23 years ago, 27-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
(...) The 'on-brake-on' method of speed control is VERY useful. When implemented it looks and acts like a stepping motor. For an example, go to my website at (URL) and navigate to my Injection Molding Factory. There is a motorized air valve with a (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Sharp GP2D12 Distance Measuring Sensor
|
|
(...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
(...) Oh, it probably does have that option; if nothing else, you can change the code to do it that way. I simply find the ON/BRAKE modulation to be more useful, so haven't bothered looking for an alternative. - Alex (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
Wow! I hope LegOS has the option to use On and Float too. I was planning on migrating to LegOS soon, but if it does On and Brake, it is to be avoided. That technique simply burns battery power! JB (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: How to orientate a robot?
|
|
Fredrik, I notice you are planning on using MATLAB/Simulink for simulating transition diagrams and testing your design. Did you know that if you have Real-Time Workshop you can generate auto-code for the MindStorm it self without having to recode or (...) (23 years ago, 26-Apr-02, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Sharp GP2D12 Distance Measuring Sensor
|
|
(...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
(...) The standard firmware does pulse-width modulation alternating between ON and FLOAT. What I think Jerry is suggesting is pulse-width modulation alternating between ON and BRAKE (which does control speed quite handily, and is what legOS does). - (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
(...) That's not really any different from what the RCX's firmware does though. You are doing pulse-width modulation and so does the firmware. The only difference is that you are using a longer time-constant. ---...--- Steve Baker ---...--- Mail : (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
Changing the motor 'speed' (pulse wave modulation) really only changes the torque. It will only change the speed if the motor is heavily loaded. Another technique that is more successful is to create a control loop in which the motor is on for 5 (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
(...) It's possible - but if you crank up the resolution you soon run into the problem that your software cannot run fast enough to keep count of the pulses. Also, it's hard to distinguish clockwise from anticlockwise rotation with a (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: WELCOME to lego-robotics@crynwr.com
|
|
For the robotics class I teach (& FLL team), I have RIS 2.0 (& 1.5) on multiple computers running Win98 and/or Win2000. No problems with either OS. Called Lego for support with a sound problem (had to get a new sound card compatible (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
(...) There are commands for the RCX to use different 'power levels' - which will translate into a change in speed if there is sufficient load. (...) lego (...) No - but you can use a gear train to make the rotation sensor spin more than once for (...) (23 years ago, 26-Apr-02, to lugnet.robotics)
|
| |
| | Sharp GP2D12 Distance Measuring Sensor
|
|
Has anyone made this sensor compatible with the RCX? For only $8 bucks it seems ideal. (URL) (23 years ago, 25-Apr-02, to lugnet.robotics)
|
| |
| | Re: Help request : LegOS 2.5, demo/c++.cpp make failure
|
|
(...) Thanks for that info - I was thinking *I* must have done something stupid ! (...) Good point ! I hadn't yet considered the overhead aspect. Thanks for the help ! jl (23 years ago, 24-Apr-02, to lugnet.robotics.rcx.legos)
|
| |
| | Re: Control lego motors and rotation sensors
|
|
(...) You can set a power level, but it doesn't seem very effective at controlling speed. (...) Usually you just gear it up so that it spins faster. If you're gearing down a motor to drive a wheel or an arm, arrange to put the rotation sensor (...) (23 years ago, 25-Apr-02, to lugnet.robotics)
|
| |
| | Re: Who makes the lego webcam?
|
|
(...) It a Logitech QuickCam Web: (URL) have to install the driver for this instead of the one that comes with the Lego cam if you want to run it under Windoze 2K or XP. It worked fine for me that way. I don't see a driver for that on the Logitech (...) (23 years ago, 25-Apr-02, to lugnet.robotics)
|
| |
| | Control lego motors and rotation sensors
|
|
1) Can you have diferent tension levels aplied to a lego motor, for speed control purposes ? Or, one can only make it turn at a constant speed. 2) Are there more precise rotation sensors than the ones that came with lego mindstorms (only 16 ticks (...) (23 years ago, 25-Apr-02, to lugnet.robotics)
|
