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I recently inherited an RCX 1.0, a serial IR tower and a few motors from a
gracious friend. After many headaches, I finally got legOS 0.2.5 running on
RH 7.1 and am able to compile and DL programs to the RCX. There is one odd
thing, however - of the four motors that my friend gave me, three of them
appear to be completely locked. Not only does the "motor_X_dir(dir)" command
not make them spin, they are completely resistant to rotation even by hand.
The fourth motor spins freely by hand, and responds properly to the motor
control calls in legOS.
Is it possible that the motors were last used with an RCX running the lego
firmware or some other OS, and that some lock command, like "off" in NQC,
was sent to the motor, and now there is no legOS call that will unlock it?
It just seems weird that they don't move at all.
I tried sending motor_X_dir(off) to the motor, but that didn't help.
Any thoughts?
Thanks-
Jeremy Clark
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Message has 2 Replies:
 | | Re: motors are stuck...
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| Jeremy, The motors that come with Mindstorms are geared internally, and it's probably jammed gears that are causing you woes. Your "friend" gave you some broken motors. I've never taken one apart-- it snaps together in a way that looks easy to break (...) (23 years ago, 17-Mar-02, to lugnet.robotics.rcx.legos)
| | | Re: motors are stuck...
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| According to a book by Ferrari brothers ("Building Robots With Lego Mindstorms") here's what you can try: --- How to release a Jammed Micromotor A micromotor jams so easily, you should know what to do when it occurs. The following list should help: (...) (23 years ago, 18-Mar-02, to lugnet.robotics.rcx.legos)
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