Anothe note-- Please do look at the wheels-- i think some of them have measurements in cm or mm I think. You can translate this directly to rotation and convert it to distance. Time is also a problem if you vary the power. Hope that helps. Sridhar On Sat, Oct 9, 2010 at 7:18 AM, Lloyd O'Hara <[log in to unmask]> wrote: > Cool idea, I like it and may borrow in the future. > > ----- Original Message ----- From: "Eric Palmer" <[log in to unmask]> > > To: <[log in to unmask]> > Sent: Saturday, October 09, 2010 7:07 AM > > Subject: Re: [VADCFLL-L] using sensors > > > Also our team constructs a measuring gauge with a wheel/tire the same >> size of the one on your robot. They put one of those orange pointers >> on an axle and use some beams to make a handle. They then just set it >> down with the point in a know position and then push it and count >> rotations. 360 degrees = 1 rotation. >> >> This way they don't have to guess, program, download, run and rinse >> repeat so often. >> >> It saves time. >> >> On Sat, Oct 9, 2010 at 6:30 AM, Lloyd O'Hara <[log in to unmask]> >> wrote: >> >>> Heather, >>> >>> One thing for your team to lookout for is battry charge. When the battery >>> charge lowers, it may take more time (seconds) to travel the same amount >>> of >>> distance as it did when the battery was fully charged. (see Curt's >>> handrill >>> analogy in a recent email). >>> >>> Our team generally uses degrees (1/360 of the circumference of the wheels >>> you are using). Degrees, as well as other sensors, can be easily measured >>> using the "View" function on the NXT. >>> >>> Lloyd >>> >>> >>> ----- Original Message ----- From: "Heather Houlden" < >>> [log in to unmask]> >>> To: <[log in to unmask]> >>> Sent: Friday, October 08, 2010 10:05 PM >>> Subject: Re: [VADCFLL-L] using sensors >>> >>> >>> 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. > -- 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.