Re: couple more questions
 

Posted by Jim Meyer at 2/13/2001 9:03 AM EST


Engineer on team #67, HOT Team, from Huron Valley Schools and GM Milford Proving Ground.


In Reply to: couple more questions
Posted by Ken Leung on 2/13/2001 5:16 AM EST:



: About how heavy is your robot? May I guess around 80 lbs?

Right now it's at ~110. No guarantees it will stay there.

: And it looks like the Van Door on the arm is directly connected on the joint.

We know better than to do that.

: The end of the gripper seems to be pretty thin and light, how well is it in gripping balls? Seems like you need the end to grip the balls right at the middle to get a good hold.

Our gripper is made of 1" square ~1/8" wall thickness extruded aluminum square tubing. It's not very flimsy. We do not need to grip the balls right at their center. Stop by our pits if you get the chance and check out our gripper. I think it's pretty interesting, but then again I designed it, so I naturally would. One thing I will say is that the pneumatic cylinder that runs our gripper was not hooked up for this picture.

At this point I want to stay away from discusing abilities. After our first regional I'll be more than willing to talk what our robot can and can't do. I say this mostly because I don't want to unintentionally mislead anyone.

Re: couple more questions
 

Posted by Mike Gray at 2/13/2001 9:08 AM EST


Engineer on team HOT from Huron Valley Schools sponsored by GM Milford Proving Ground.


In Reply to: couple more questions
Posted by Ken Leung on 2/13/2001 5:16 AM EST:



: Just wonder about the details of the robot...

: It seems to me the robot is going to be pretty light, considering the simple design and the single arm. About how heavy is your robot? May I guess around 80 lbs?

It weighs 108 pounds without the skin.

: And it looks like the Van Door on the arm is directly connected on the joint. So, no gear reduction to keep it slow and strong?

Gear reduction at the "elbow" joint is 3:1. "Shoulder" joint is 6:1, and driven with window motors.

: The end of the gripper seems to be pretty thin and light, how well is it in gripping balls? Seems like you need the end to grip the balls right at the middle to get a good hold.

: And finally, the robot looks like it can fold up and go under the bar. And secret under the drive train in between the two wheels that will get the robot over the 4x6 easily, or it's doing it quite smoothly using the two wheels?

The powertrain fits within a wheel diameter. Drill motors in the front (2-speed final), FP motors in the rear. The final stage has been removed from the FP motors, and the speed adjusted in software.

: Sorry, I don't want to sounds like am criticizing... just want to gather some info, that's all.

: By the way, this robot looks REALLY REALLY HOT!!!

Thanks, from the HOT team.

Very nice.....
 

Posted by Andrew Fleming at 2/13/2001 3:34 PM EST


Coach on team #221, MI Roboworks, from Michigan Technological University and MI Roboworks / MTU.


In Reply to: Sneak Preview of HOT BOT, #67
Posted by Jim Meyer on 2/12/2001 1:00 PM EST:



Just checking up on my old team....

Nice work, as always! Best of luck, and I'll see you all at the Great Lakes Regional.

Andy Fleming
MI Roboworks
Team # 221
Electronics/Programming