[eagleengineering] Re: Ballast
- From: Jeff Kane <stonefan527@xxxxxxxxx>
- To: eagleengineering@xxxxxxxxxxxxx
- Date: Sun, 10 Apr 2005 20:50:15 -0700 (PDT)
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 fr
ont 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 budget, 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.
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