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problems with motors 
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Joined: Thu Jan 22, 2009 6:50 pm
Posts: 3
Post problems with motors
Ok. I need help!! I have two geared drive motor and when I run a sample drive program, the motors don't work right. What happens is that if i move the joysticks a little bit, or not even at all, the motors start moving, and they don't stop. It goes in wild directions and doesn't stop until I refresh the joysticks. Why is this happening?? I need help urgently.


Thu Jan 22, 2009 6:54 pm
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Joined: Wed Jan 24, 2007 10:42 am
Posts: 620
Post Re: problems with motors
Sounds like you have PID enabled on these motors. You don't want PID on joystick-controlled motors as it'll cause odd behaviors.

Also, do a search for "deadzone" on the fourms to alleviate the not-stopping motors.

Timothy Friez
ROBOTC Developer - SW Engineer

Fri Jan 23, 2009 11:26 am

Joined: Mon Jun 01, 2009 3:41 pm
Posts: 13
Post Re: problems with motors

I'm trying to connect four motors (interactive servo motors) to my NXT brick, but there's only 3 ports for motors...I'd like to avoid using two bricks--it's too heavy. I've been told that I could use two bricks connected via bluetooth, or maybe use a third party multiplexer...any suggestions?


Wed Jun 03, 2009 1:47 pm

Joined: Tue Jan 13, 2009 5:22 pm
Posts: 72
Location: USA, Pennsylvania
Post Re: problems with motors
Good topic to look at is
Not to much explanation but it certainly works.

We need a Linux Version!

Mon Jun 08, 2009 6:21 pm
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Joined: Mon Jun 01, 2009 3:41 pm
Posts: 13
Post Re: problems with motors
I'm confused as to why the forum topic you sent me to is on joystick I really missing something? :?
Thanks for your time, though--I appreciate it. :)

Mon Jun 08, 2009 10:03 pm
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Joined: Wed Mar 05, 2008 8:14 am
Posts: 3589
Location: Rotterdam, The Netherlands
Post Re: problems with motors
If your problem has nothing to do with controlling motors with a joystick, then why did you post in this thread? Please create your own if it is nothing like the problem in the original post. What you're doing is thread hijacking and it's frowned upon.

Emil gave you help based on the original problem; controlling motors with a joystick.


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Tue Jun 09, 2009 1:41 am
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