Subject:
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Re: Control lego motors and rotation sensors
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 26 Apr 2002 01:42:10 GMT
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Original-From:
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Steve Baker <sjbaker1@airmailIHATESPAM.net>
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Reply-To:
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SJBAKER1@avoidspamAIRMAIL.NET
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Viewed:
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583 times
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nelson gonXalves wrote:
> 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.
There are commands for the RCX to use different 'power levels' - which will
translate into a change in speed if there is sufficient load.
> 2) Are there more precise rotation sensors than the ones that came with • lego
> mindstorms (only 16 ticks per revolution) ?
No - but you can use a gear train to make the rotation sensor spin more
than once for each revolution of the shaft you are trying to measure. This
effectively improves the angular resolution of the sensor.
----------------------------- Steve Baker -------------------------------
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Message has 1 Reply:
 | | Re: Control lego motors and rotation sensors
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| 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 (...) (22 years ago, 26-Apr-02, to lugnet.robotics)
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Message is in Reply To:
| | Control lego motors and rotation sensors
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| 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 (...) (22 years ago, 25-Apr-02, to lugnet.robotics)
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