Comments on: Project: Dancebot http://www.smbaker.com/project-dancebot Scott's project and hobby site Sat, 31 Dec 2011 18:02:49 +0000 http://wordpress.org/?v=2.9.1 hourly 1 By: James F. Ward http://www.smbaker.com/project-dancebot/comment-page-1#comment-308 James F. Ward Fri, 02 Jul 2010 15:56:02 +0000 http://www.smbaker.com/?p=525#comment-308 You probably have looked at this site but I pass it along anyway. http://www.balbots.com They have a good box mast "Balance Bot" design. When I found out they were out of business I shamelessly copied the mechanical lay out for a one-off project I have substituted my own electronics. I seem to remember a vidio link showing thir Bot in operation. Jim Ward You probably have looked at this site but I pass it along anyway. http://www.balbots.com They have a good box mast “Balance Bot” design. When I found out they were out of business I shamelessly copied the mechanical lay out for a one-off project I have substituted my own electronics. I seem to remember a vidio link showing thir Bot in operation.

Jim Ward

]]> By: admin http://www.smbaker.com/project-dancebot/comment-page-1#comment-306 admin Fri, 02 Jul 2010 15:39:21 +0000 http://www.smbaker.com/?p=525#comment-306 Thanks for the additional information, James. I'll definitely try placing the battery higher. I had noticed that many balancing robots had a mast, but until now I haven't understood the physics behind it. Thanks for the additional information, James. I’ll definitely try placing the battery higher. I had noticed that many balancing robots had a mast, but until now I haven’t understood the physics behind it.

]]> By: James F. Ward http://www.smbaker.com/project-dancebot/comment-page-1#comment-305 James F. Ward Fri, 02 Jul 2010 12:41:34 +0000 http://www.smbaker.com/?p=525#comment-305 May I suggest the addition of a mast with the batteries located at the top. (see original Hanno video) Tall objects fall over very slowly. Hanno placed his camera and his batteries on the top of a mast to allow more time for the system to correct in pitch. The accel. should be located on the top of the mast and the gyro placed as close as possible to the pitch (axle) center line. The accel. is at a serious disadvantage located so close to the pitch axis. Consider, if you place the accel. on the pitch axis it would sense only forward/reverse acceleration generated by the motors, not the acceleration due to the rate-of-change as the robot falls over. Try this experiment. Take your kitchen broom, place the handle in the palm of your flat open hand. Try to balance the broom (brissels up) by moving your hand as required to keep the broom vertical. With a little practice....... Now try the same thing with a ball point pen. Just a few loose thoughts over Saturday morning coffee. No offense intended, I hope none taken. James (jim) Ward Carrollton Texas May I suggest the addition of a mast with the batteries located at the top. (see original Hanno video) Tall objects fall over very slowly. Hanno placed his camera and his batteries on the top of a mast to allow more time for the system to correct in pitch. The accel. should be located on the top of the mast and the gyro placed as close as possible to the pitch (axle) center line. The accel. is at a serious disadvantage located so close to the pitch axis. Consider, if you place the accel. on the pitch axis it would sense only forward/reverse acceleration generated by the motors, not the acceleration due to the rate-of-change as the robot falls over.

Try this experiment. Take your kitchen broom, place the handle in the palm of your flat open hand. Try to balance the broom (brissels up) by moving your hand as required to keep the broom vertical. With a little practice……. Now try the same thing with a ball point pen.

Just a few loose thoughts over Saturday morning coffee. No offense intended, I hope none taken.

James (jim) Ward
Carrollton Texas

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