Dons robot projects

[Don Doerfler]

yes its a 6lb , I had 16v's going to the 9v 385s. I do have 400s but if both of them can fit in a 3.875 area then I could possibly use them.

[Don Doerfler]

made a new drum for my 6 and my 3

[MikeNCR]

You should epoxy the Mountain Dew can to the 6lbers drum. It looks like a near perfect fit.

[Don Doerfler]

a regular can is a closer fit than the 24 oz one

[Harry Hills]

Tooth material? Drum material?

Looks very neat.

[Don Doerfler]

its just 6061 al with 52 rwc s7

[Koolaid64]

all steel drum! you know you want to so hard. ping

[Lucas Grell]

By the way, how thick is SNS2's shaft? Looks pretty thin, and the material around it.  I'd think you'd bend a lot of shafts...

[Don Doerfler]

its 1/2inch s7 hardened at 52rwc out of the four losses it has none were due to shaft failure

[Lucas Grell]

Hmm, I guess SNS2's beater is just thicker than I thought. I suppose that bulge in the middle threw me off a bit. How'd SNS do last year/so far this year, anyways? We had a couple beater bots at the NRL competition two years ago, GTO and G6. I didn't have much to do with them, but it was still pretty fun to go and see some of the bots there.

[Don Doerfler]

the od on stills beater around the shaft is around 1.6ish and the beater still managed to break in half. I haven't done much with it often but here's everything its done

1st swpa regionals March 2012
1st swpa finals April 2012
Coolest robot swpa April2012
2nd nrl nationals May 2012
national grand champ May 2012
2nd rage in the cage May 2014
best engineered rage in the cage may 2014
1st Franklin institute October 2014
overall 22-4

[Lucas Grell]

Hmm, how hard is it? Does the bulge have radiused edges? UC2's weapon is probably about the same width around the shaft as yours, but only like 1 1/4 thick, and they never broke it. Maybe you should add more width there, like UC does, they don't mill as much off for the pocket around the shaft, it ends up kinda I-shaped.

[Don Doerfler]

@kyle I do have a random steel tube assuming its low carbon steel I don't think it would bond well with any type of tool steel

[Joe Doerfler]

Lucas, I have no idea what you are talking about, can you please be more specific. Last year, Plum Robotics made a new Still N Shock 2 with a new beater, 1/2 S7 hardened shaft to 52 Rockwell and like 7 or so inches long and have never had a shaft bend so bad that it is noticeable. They have bent on the ends slightly, but that is why we have backups. The only reason why Final Cuts shafts never bend is because of the length of there weapon. Its probably only 3 inches long, and not a lot of surface area for it to bend, where Still N Shock 2s shaft is twice the size in length and has a slight bend on the ends.

[Lucas Grell]

You misunderstood, what I was saying is two separate things entirely. I thought the shaft looked thin because I didn't think SNS2's beater was that thick. The second posts were about SNS's beater breaking.