04-01-2015 19:39

audietron

Re: pic: 6 Stack Conundrum

Even if the robot was not designed exactly like this, does anyone worry about the axles on a west coast drive bending for the weight?

04-01-2015 19:41

Thad House

Re: pic: 6 Stack Conundrum

Not really. 7075 axles are actually really strong. They might bend if you jump them, but I don't see them bending if you just load them up with alot of weight.

04-01-2015 19:47

Foster

Re: pic: 6 Stack Conundrum

Cool, so it's a really hard engineering competition!! How great is that!

And here everybody thought it was going to be stupid boxes moving around with dozers.

Love me some hard engineering problems.....

04-01-2015 19:58

Arpan

Re: pic: 6 Stack Conundrum

This 'conundrum' makes the important assumption that you don't have outrigger wheels to stabilize, a counterweight, or a way of taking the boxes further into your wheelbase.

04-01-2015 21:24

rich2202

Re: pic: 6 Stack Conundrum

Forklifts are designed to tilt the stack a little backwards.

04-01-2015 23:55

75vs1885

Re: pic: 6 Stack Conundrum

I am not worried about the axle bending from the weight but rather balancing the robot. Jesse brought up a really good point which I haven't really thought of, the weight shifts substantially when with and without totes. I'm curious to see if going onto the scoring platform with the totes would cause us to tip.

05-01-2015 09:42

jijiglobe

Re: pic: 6 Stack Conundrum

I really doubt it because our team keeps our old robots in a small room so when we have to get to the back of the room we just step on the chassis and none of our robots has a bent axle yet. I doubt 40 pounds is enough to bend a good steel axle.

05-01-2015 09:46

75vs1885

Re: pic: 6 Stack Conundrum

The axles we use are aluminum, I believe someone mentioned that they're 7075.

05-01-2015 09:50

PayneTrain

Re: pic: 6 Stack Conundrum

Good thing robots aren't required to drive onto the scoring platform to score anything.

05-01-2015 10:40

JesseK

Re: pic: 6 Stack Conundrum

Even if you're being sarcastic, they indeed are not required to drive onto the platform to score the boxes on the platform. Particularly when picked up in this manner (from the skinny ends).

I'm surprised more on the plausibility of picking 6 up in a single stack hasn't come up from a tote integrity point of view. One of the Ri3D videos had a good demonstration of the damage that happens to the bottom tote when multiple totes are stacked on top of it while it's lifted by the single finger.

05-01-2015 15:32

75vs1885

Re: pic: 6 Stack Conundrum

Even with 4 totes and a recycling bin the bottom tote starts to become bent and altered