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-   -   What is wrong? [HELP] (http://www.chiefdelphi.com/forums/showthread.php?t=104356)

Andrew Lawrence 09-03-2012 00:45
Re: What is wrong? [HELP]
 
Quote:
Originally Posted by BeltSanderRocks (Post 1141259)
Not sure if I told you already, but we are about 15 under. We are definitely gonna bring some thick steel to attach on Thursday.

As for where, you could attach it to the very bottom of your robot, sort of like a baseplate. This should not change much, as it would be low enough to allow balls to pass over without any problem.

You could always just put on one of those half-freshmen that lay around after accidents... :ahh:
Yeah, I think you told me; About 105 pounds. The problem with sticking the weight low for us is there isn't much room "low" on our robot for stuff to go.

We have 108 square inches of space down at the bottom of our robot. Our robot is 27*37 inches (999 square inches) for a base, and 108/999 is about 10% of our robot's base area. The other 90% is used for ball pickup.

You've seen our design (new pictures should be on CD media sometime soon). There's no room on the bottom. :p

jblay 09-03-2012 01:03
Re: What is wrong? [HELP]
 
I would add a 148 style pneumatic for some 3 robot balancing if we had the weight. I recommend an attempt at implementing that. Any other weight is what steel plate is for.

Ankit S. 09-03-2012 02:52
Re: What is wrong? [HELP]
 
Quote:
Originally Posted by jblay (Post 1141272)
I would add a 148 style pneumatic for some 3 robot balancing if we had the weight. I recommend an attempt at implementing that. Any other weight is what steel plate is for.
Thats a good idea.

Especially since you (256) are going to two regionals, you do have some extra time to perfect your mechanism. Also 30 lbs of steel might be a bit much to squeeze into 108 sq in.
You are not using pnuematics, but instead you could use a motor to have a stinger come down by means of a 4-bar linkage or something of the sort...

Are you guys counting chain and fasteners? Those can hike up the weight quickly enough.

seg9585 09-03-2012 03:46
Re: What is wrong? [HELP]
 
You could have added additional drive power.

Alternatively, if you use a launcher you could increase the weight of the flywheel to maintain angular momentum which helps with consistency.

In San Diego we added a few 2.5-lb weights on the chassis to lower the CG and help balance with other robots.

One team in San Diego installed a custom motherboard to run Linux, so they could independently process Kinect data (which was installed on the robot as a webcam). they were way overweight, but for some reason decided to drop motors and structure rather than getting rid of the extraneous sensor equipment.

Andrew Lawrence 09-03-2012 08:55
Re: What is wrong? [HELP]
 
Quote:
Originally Posted by BeltSanderRocks (Post 1141282)
Thats a good idea.

Especially since you (256) are going to two regionals, you do have some extra time to perfect your mechanism. Also 30 lbs of steel might be a bit much to squeeze into 108 sq in.
You are not using pnuematics, but instead you could use a motor to have a stinger come down by means of a 4-bar linkage or something of the sort...

Are you guys counting chain and fasteners? Those can hike up the weight quickly enough.
Chain and fasteners included.

I've been looking into the 148-like stinger, but unfortunately the place where we'd put it isn't low enough to the ground for it to reach, so IDK about that one.

Chickenonastick 10-03-2012 00:31
Re: What is wrong? [HELP]
 
Add random pneumatics to your robot :p


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