good point Joe ----- Original Message ----- From: "Kaperick, Joe" <[log in to unmask]> To: "Lloyd O'Hara" <[log in to unmask]>; <[log in to unmask]> Sent: Saturday, October 09, 2010 11:02 AM Subject: RE: [VADCFLL-L] using sensors > > All very cool ideas and thoughts about ways to have the robot > navigate and cover specific distances repeatably. My one concern, > especially for the newer coaches, is that these methods shouldn't be > handed to the team "pre-packaged". At best, they should be observing > the problems with using a timed setting and brainstorming ideas for ways > to make it better. They will learn much more and incorporate those > learnings more easily in other areas than if you just hand them a > solution or what you as the coach thinks is a more efficient (or > "correct") way of doing something. > Don't mean to put down the ideas and great thoughts being passed > around but don't want to lose the main focus of the whole exercise. > Good luck to all! > Joe Kaperick > > -----Original Message----- > From: First Lego League in Virginia and DC > [mailto:[log in to unmask]] On Behalf Of Lloyd O'Hara > Sent: Saturday, October 09, 2010 10:46 AM > To: [log in to unmask] > Subject: Re: [VADCFLL-L] using sensors > > For older team members, that's great, my team is all 4th graders and > they > are having issues with ccntemplating that 1 rotation = 360 degrees. If, > > like me, you want to make it a little easier for them, measure the > circumfrence of the wheel directly (cloth measuring tape works wonders) > or > you can just go to the view function (motor degrees) and use the bot as > a > measuring device by pushing it, with the wheels turning, from point A to > > point B. In the end it's all the same just different ways of > approaching > the challenge, much like the multitude of bots and challenge solutions > you > will see at a tournament. > > ----- Original Message ----- > From: "Swayne, Dominic - swaynedd" <[log in to unmask]> > To: <[log in to unmask]> > Sent: Saturday, October 09, 2010 10:32 AM > Subject: Re: [VADCFLL-L] using sensors > > >>I recommend they try another method for distance. Time (10 sec) will >>remain >> constant but the distance traveled will vary with the power of the >> batteries. You'll find the rotation sensors (rotations or degrees) > will >> give them a much more reliable metric. You can incorporate math > (Diameter >> of the wheel x pi = circumference for one rotation) to calculate > degrees >> of >> rotation to achieve a given distance. >> >> >> On 10/8/10 10:05 PM, "Heather Houlden" <[log in to unmask]> wrote: >> >>> It is my first year as well, so we are learning too. However, my kids > are >>> measuring the distances the robot needs to travel. >>> We programmed the robot to travel in a straight line for a set time > (I >>> think it was 10 sec). Then they measured the distance travelled, and > I >>> had them compute the seconds per inch travelled. >>> >>> Then they just multiply the seconds/inch by the number of inches the >>> robot needs to move, so that they can program the number of seconds >>> to move. >>> So far it seems to be working OK for them. There may be an easier way >>> to do it, but this is what they came up with. >>> Hope this helps! >>> Heather >>> Team Blockbusters >>> >>> -- To UNSUBSCRIBE or CHANGE your settings, please visit >>> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or >>> leave the >>> list". >>> >>> -- VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. > >>> Visit >>> https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe. >> >> -- To UNSUBSCRIBE or CHANGE your settings, please visit >> https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or > leave >> the list". >> >> -- VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. >> Visit https://listserv.jmu.edu/archives/vadcfll-admin-l.html to > subscribe. >> > > -- To UNSUBSCRIBE or CHANGE your settings, please visit > https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or > leave the list". > > -- VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. > Visit https://listserv.jmu.edu/archives/vadcfll-admin-l.html to > subscribe. -- To UNSUBSCRIBE or CHANGE your settings, please visit https://listserv.jmu.edu/archives/vadcfll-l.html and select "Join or leave the list". -- VADCFLL administrative announcements are sent via VADCFLL-ADMIN-L. Visit https://listserv.jmu.edu/archives/vadcfll-admin-l.html to subscribe.