that is what i ment the issue was not with the arm down it was with it up ----- Original Message ----- From: Jeff Kane To: eagleengineering@xxxxxxxxxxxxx Sent: Sunday, April 10, 2005 8:50 PM Subject: [eagleengineering] Re: Ballast Ya, the drive train is alright. We should just add weight to the back like Mr. Mitchell had said. Changing the drive train in Atlanta on Thursday will be somewhat of a big task and chances are, we will have many problems. One will be having drive wheels in the front on the bent chassis. The drive wheels are bigger and that will also not affect the robot rocking over the front wheels. We have about 10 spare pounds on the robot that we can use for adding extra weight, so we should see to adding some weights in the battery box, or on the chassis. Oh and Nick...most of the weight is in the back. The battery, gearboxes, and the two posts holding up the arm are closer to the back of the chassis. Only when the arm is extended over the front of the chassis does it seem like the weight is out there because of how the center of gravity changes and the robot rocks on the front wheels. Turning will also be durastically changed too because the turning radius will be around the front of the robot where the arm is rather than the back of the robot, where all of the weight is. -Jeff Michael Montazeri <chaoticprout@xxxxxxxxx> wrote: I'd rather not change a working drive train at Atlanta.... On Apr 10, 2005 6:43 PM, Karen Hillblom wrote: > that is an issue that we were discusing befor we shiped the robot > that problem can be fixed by puting the 4 driven wheels to the front insted > of the back and have the omni wheels in the back > because most of the weight is in the front > that way there is no added weight and turning should be about the same. > > ----- Original Message ----- > From: Nancy > To: eagleengineering@xxxxxxxxxxxxx > Sent: Sunday, April 10, 2005 5:00 PM > Subject: [eagleengineering] Ballast > > > > I had a thought today about the robot rocking onto the front wheels, and > loosing traction. > > You may want to look at your remaining weight bud get, and add some dead > weight under the battery. > > Five to seven pounds would be good. > > This would lower the center of gravity and keep better traction. > > > > The down side may be more difficult turning, due to better traction. > > > > The video I shot of the semi finals shows the robot clearly rocking onto the > front wheels, and the traction wheels freely spinning. > > This started the robot rocking back and forth almost wildly as it approached > the scoring tetra. > > > > Let me know what you think! > > > > J. Ray Mitchell Jr. > > Director of Engineering > > Cinesite Digital Studios, Hollywood. ------------------------------------------------------------------------------ Do you Yahoo!? Yahoo! Small Business - Try our new resources site!