quote:

---

Originally posted by Philip Taylor:
Where did you buy your pulleys and belts? What do they weigh?

---

I'm starting to think the new shell might be a bit unrealistic to be done before Robowars. After yesterday and chatting with the guys I would like to make some improvements @ the same time.

The 7/8 wheels were never as wide as I thought they would be. The soft mild steel edges of the wedges will not last for many events.

Solutions are wider 3" wheels, going up to 1-1/2" wide. Easy done, the shell will just have to be a bit wider. And of coarse this will give Eleanor increase traction.

Hardox/Bisalloy replaceable wedge tips. I don't think this need explaining.

Also rollerbearings on the inside bearing mounts.

Going to the hardox for the shell might give me spare weight to make these improvements(Its just has to be checked in CAD). After all that I might be happy with it, well until the next problem comes along(I will just fix that one too ).


So for Robowars I might just remove weight from the current shell(so the pneumatics will fit in underweight). And replace the ploycarb baseplate.
_________________
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Albert Einstein.

So rather than blame the EO for your lack of traction you’re going to put sticker wheels on?
More non-typical behavior.
I am sure Brett would get the VHT out.

In my old drag racing days I preferred to run slightly bigger tires than theoretically necessary with a perfect track, you wont go quite as fast but consistency is important in Super Sedan and Robot Combat.




Larger diameter as well as wider as well as friction coefficient vrs weight and durability cost availability attachment method etc. Polar moment of inertia as far as reversing shock loads on gearboxes, Like any part in a bot it depends.

Yes, more thought may be needed before replacing the wheels with larger ones.

Eleanor's shell is now lighter, but still strong.

Grinder:
http://i41.photobucket.com/albums/e275/trentellis/IMG_0074.jpg

Flap disk:
http://i41.photobucket.com/albums/e275/trentellis/IMG_0076.jpg

Paint:
http://i41.photobucket.com/albums/e275/trentellis/IMG_0078.jpg
_________________
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Albert Einstein.

Very clever lightening method!
Should still be a tough little bot to crack.
_________________
( •_•)

( •_•)>⌐■-■

(⌐■_■)

YEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH

Ah... Never thought of using the grinder to mill slots in the interior Good work Trent, finally you used some Ghetto skills in your bot!
_________________
https://www.halfdonethings.com/

thx guys, not my idea in the end. I helped Andrew with his Spectrum and we discussed lightning ideas. He came up with the use of the grinder and I went with that.
_________________
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Albert Einstein.

quote:

---

Originally posted by Rotwang:
So rather than blame the EO for your lack of traction you’re going to put sticker wheels on?
More non-typical behavior.
I am sure Brett would get the VHT out.

---

Yeah but that was with a Dewalt per wheel
_________________
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Albert Einstein.

the point still stands

quote:

---

You cant get much stickier than 4x2in colsons

---

No it doesn't, 'wider wheels' and maybe less power in singularity's case.

Traction control how hard would it be? I'm thinking maybe some shaft encoders and some on-board processing?
_________________
Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.
Albert Einstein.

quote:

---

No it doesn't, 'wider wheels' and maybe less power in singularity's case.

---

quote:

---

Traction control how hard would it be? I'm thinking maybe some shaft encoders and some on-board processing?

---

Use an accelerometer for detecting if the robot is accelerating or just spinning. get the micro to check the RPM of the wheels and see if it is increasing it's speed till the threshold or just burning rubber... Spark Electronics have some cool 3 axis accelerometers (They have the ones used in the Nintendo Wii controller too)
_________________
https://www.halfdonethings.com/

only thing you need to work on would be how to stop it charging off in random directions when someone rams you.
_________________
www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Might sound a little hypocritical coming from me, but since you've already got a gyro, you could just lay off the stick a little
_________________
Jeff Ferrara
fb@ffej.net

ffej.net