Comments on: MATLAB Packages for the NXT http://www.brickengineer.com/pages/2009/02/11/matlab-packages-for-the-nxt/ LEGO Engineering for LEGO NXT and Robot Enthusiasts Sun, 08 Jan 2012 05:55:17 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: thee http://www.brickengineer.com/pages/2009/02/11/matlab-packages-for-the-nxt/comment-page-1/#comment-19358 thee Wed, 04 May 2011 18:36:10 +0000 http://www.brickengineer.com/pages/?p=45#comment-19358 I’ve gone in advance and bookmarked <a href="http://www.brickengineer.com/pages/2009/02/11/matlab-packages-for-the-nxt/" rel="nofollow">http://www.brickengineer.com/pages/2009/02/11/matlab-packages-for-the-nxt/</a> at Digg.com so my pals can see it too. I basically utilized MATLAB Packages for the NXT | BrickEngineer as the entry title in my Digg.net book mark, as I realized if perhaps it really is superior sufficient for you personally to title your weblog publish which, then you definitely probably would like to view it added the identical way. I’ve gone in advance and bookmarked http://www.brickengineer.com/pages/2009/02/11/matlab-packages-for-the-nxt/ at Digg.com so my pals can see it too. I basically utilized MATLAB Packages for the NXT | BrickEngineer as the entry title in my Digg.net book mark, as I realized if perhaps it really is superior sufficient for you personally to title your weblog publish which, then you definitely probably would like to view it added the identical way.

]]> By: Linus Atorf http://www.brickengineer.com/pages/2009/02/11/matlab-packages-for-the-nxt/comment-page-1/#comment-1626 Linus Atorf Fri, 20 Nov 2009 04:20:38 +0000 http://www.brickengineer.com/pages/?p=45#comment-1626 To clarify the little mixup from the list of the 3 MATLAB packages: The 2nd one seems to be for general robotics purpose (although the link is dead now). The RWTH - Mindstorms NXT Toolbox for MATLAB is specifically geared toward the NXT. As to the problem you describe that MATLAB crashes could potentially destroy your robot: With version 2.03 (and better) of the RWTH NXT toolbox, we introduced a program called MotorControl which is running on the NXT brick. It makes sure the motors do what you commanded them to do, no matter what happens to MATLAB or the communication channel. Also we made the orange center button on the NXT an "EMERGENCY STOP" button -- once pressed, all motors will stop at once, with power turned off. Even better with version 4.02, the MotorControl program will also be stopped, so that no further MATLAB commands are possible until a restart (of the MATLAB program). This helps a great deal protecting robot constructions. Last not least: Even with on-brick-programs (started by the user or started from MATLAB), you can never fully avoid possible damage to your robot when making mistakes in programming... So always be careful :-) It's also worth checking out the latest version of the RWTH - Mindstorms NXT toolbox for its greatly improved motor precision (introduce with version 4.00). Smooth braking guarantees high accuracy of +/- 1 degree about 90% of the time. Regards, Linus To clarify the little mixup from the list of the 3 MATLAB packages: The 2nd one seems to be for general robotics purpose (although the link is dead now). The RWTH – Mindstorms NXT Toolbox for MATLAB is specifically geared toward the NXT.

As to the problem you describe that MATLAB crashes could potentially destroy your robot: With version 2.03 (and better) of the RWTH NXT toolbox, we introduced a program called MotorControl which is running on the NXT brick. It makes sure the motors do what you commanded them to do, no matter what happens to MATLAB or the communication channel. Also we made the orange center button on the NXT an “EMERGENCY STOP” button — once pressed, all motors will stop at once, with power turned off. Even better with version 4.02, the MotorControl program will also be stopped, so that no further MATLAB commands are possible until a restart (of the MATLAB program). This helps a great deal protecting robot constructions. Last not least: Even with on-brick-programs (started by the user or started from MATLAB), you can never fully avoid possible damage to your robot when making mistakes in programming… So always be careful :-)

It’s also worth checking out the latest version of the RWTH – Mindstorms NXT toolbox for its greatly improved motor precision (introduce with version 4.00). Smooth braking guarantees high accuracy of +/- 1 degree about 90% of the time.

Regards, Linus

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