Originally Posted by EricH (Post 713116)

I think we have a winner--it looks like 330 2005/2007 for the base with 254/60 2004 on the gripper. (BTW, I think the drivebase teaser for this robot was a bit of a bluff. The other teaser is in plain view.)

Originally Posted by GeeForce (Post 713311)

Not to hijack the thread, but I just wanted to make a note here. Although we originally had a dog gear clutch designed in the arm gearbox (good guess haha), we found it was easier to just time a simultaneous release the ball + stop the drive momentarily + start pulling back the arms. I'm sure that after practice 330 will adopt a similar strategy.

Originally Posted by GeeForce (Post 713311)

Tip coming from someone who did just that at STL - the crowd will looovvve it :) We had people coming up to us all day, "that was soo cool how you picked yourselves up" etc.

Originally Posted by Hachiban VIII (Post 713389)

How were you able to bend PVC in such nice arcs? We've always had to kink it little by little, and we've always had a horrible time with anything larger than 3/4" dia.

Originally Posted by Joe Ross (Post 713253)

We can pick ourselves up from any direction we might fall, using either the herder, the arm, or both.

Originally Posted by GeeForce (Post 713311)

Tip coming from someone who did just that at STL - the crowd will looovvve it :) We had people coming up to us all day, "that was soo cool how you picked yourselves up" etc.

Originally Posted by Jeremy Roberts (Post 713406)

Is that a 1.5" bore or 2" bore that you have for the gripper..I assume 2"??

Originally Posted by Syncopation (Post 713216)

Amazing design and execution guys - I've seen what you've done in the past, and you might have even outclassed yourselves. Awesome robot, hope you do well!

One question (and this was the main problem for a number of robots at week 1 regionals - or maybe just St. Louis), but from the video, it looks like when you hit the overpass with the arm and let go of the trackball with the hand, you're in a position to be "clotheslined". Any ideas on avoiding this?

217 (the ever-powerful ThunderChickens) impressed everyone with their "slam dunks": they (from what I saw) could disengage their arm so that the force from hitting the overpass flipped the arm backwards so they could drive under the overpass safely (a dog gear or something like that was my guess - never got the chance to ask them myself). Probably not much help for you, since it doesn't look like you guys can rotate the arm past vertical to the back, but just a thought. Might want to watch out for that.

Anyway, you guys have a great design (I never would have thought of two arms organized like that) and best of luck to you in your regionals and championship!

[I apologize for the novel here, just a thoughtdump more than anything.]

Originally Posted by Jeremy Roberts (Post 713406)

Is that a 1.5" bore or 2" bore that you have for the gripper..I assume 2"??

Originally Posted by GeeForce (Post 713311)

Not to hijack the thread, but I just wanted to make a note here. Although we originally had a dog gear clutch designed in the arm gearbox (good guess haha), we found it was easier to just time a simultaneous release the ball + stop the drive momentarily + start pulling back the arms. I'm sure that after practice 330 will adopt a similar strategy.

Originally Posted by Mike Harrison (Post 713453)

Nice guess on the dog gear, but as Grant said we left that strategy for just plain old timing in the driver's box. ;) *high-fives Grant*

Originally Posted by Syncopation (Post 713618)

Someone mentioned violating 80" rule when lifting yourself back up... Do you? (I can't see a way to really get around that - but I'm sure you can more than make up the 10 point penalty with that monster of a robot.)