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  #171  
Old 04-29-2012, 09:20 PM
meng meng is offline
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Re: VEX Sack Attack Design Thread

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Originally Posted by 1039B View Post
Ok. I'm going to end this. Lets get back on topic. for a blocking robot, Im thinking two small robots connected by a tether to block the whole court off
But if it is just a tether, then it might not be strong enough to block robots from pushing through.... unless it is something like 44's design for Gateway.. but that will mean you will need to spam a lot of c-channels and linear slides (i.e. too heavy?)...
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  #172  
Old 04-29-2012, 09:44 PM
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Re: VEX Sack Attack Design Thread

We had a similar design to Green eggs at worlds, it had 15 linear slides on it and it was only 6 feet wide. to have one 12 feet wide with the same mechanism would be insane. And not in a good way.

There are a few other options, but you better be ready to devote your entire robot to it if you want to get full field wide.
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  #173  
Old 04-29-2012, 10:20 PM
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Re: VEX Sack Attack Design Thread

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Originally Posted by snowpenguin View Post
We had a similar design to Green eggs at worlds, it had 15 linear slides on it and it was only 6 feet wide. to have one 12 feet wide with the same mechanism would be insane. And not in a good way.

There are a few other options, but you better be ready to devote your entire robot to it if you want to get full field wide.
I am not sure if it is even worth the effort in blocking the entire field (assuming it is possible).
The wallbot will need to go underneath the trough and then extend itself. For a robot that carries enough c-channels and linear slides to block off the entire field, i really don't think it can move that fast.

That will mean that most likely, the opponents will be able to get all the sacks lying underneath the troughs and even score into the troughs before they are being cornered off....

so... not much point having a wallbot is it?

Or.... wait... what if someone manage to shoot something (eg. a net) across the troughs (during autonomous)....
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  #174  
Old 04-29-2012, 10:24 PM
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Re: VEX Sack Attack Design Thread

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Originally Posted by meng View Post
I am not sure if it is even worth the effort in blocking the entire field (assuming it is possible).
The wallbot will need to go underneath the trough and then extend itself. For a robot that carries enough c-channels and linear slides to block off the entire field, i really don't think it can move that fast.

That will mean that most likely, the opponents will be able to get all the sacks lying underneath the troughs and even score into the troughs before they are being cornered off....

so... not much point having a wallbot is it?

Or.... wait... what if someone manage to shoot something (eg. a net) across the troughs (during autonomous)....
If it's shooting a net, you're violating the "entanglement" rule. If it's shooting a wall, that's another story.
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  #175  
Old 04-30-2012, 01:04 AM
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Re: VEX Sack Attack Design Thread

if a wallbot can successfully trap 2 robots = autowin
(partner can just descore and score at their own will)

if one opponent gets past the wall = wallbot useless

it is more difficult this year to ensure that opponents wont get past (first few secs of auton)
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  #176  
Old 04-30-2012, 07:20 AM
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Re: VEX Sack Attack Design Thread

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Originally Posted by murdomeek View Post
if a wallbot can successfully trap 2 robots = autowin
(partner can just descore and score at their own will)

if one opponent gets past the wall = wallbot useless

it is more difficult this year to ensure that opponents wont get past (first few secs of auton)
But that's the main issue - how to have a wallbot that carries so much linear slides and c-channels (in order to block the whole field) and yet moe fast enough to corner the opponents within the 1st few seconds?

But of course, I am assuming using linear slides and c-channels (in order to be robust enough)... Maybe there are better choices of materials and parts....
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  #177  
Old 04-30-2012, 08:29 AM
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Re: VEX Sack Attack Design Thread

There's always 575's elastic powered extending arms. First second: elastic expansion all the way out to the middle of the field. Second second: expansion in both directions to create a wall.

Of course, wall bots might not be the best solution. Would you build a wall bot for Round Up? (Actually, you didn't need to, even if you didn't put bases in the ladder) Their main purpose is to deny the other team from scoring, but the field is simply so wide that territory denial and blocking off access might not be particularly useful.
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  #178  
Old 04-30-2012, 11:29 AM
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Re: VEX Sack Attack Design Thread

Would it be entanglement if you just had two small robots tethered together with string so you could just separate and block the whOle field?
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  #179  
Old 04-30-2012, 11:38 AM
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Re: VEX Sack Attack Design Thread

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Originally Posted by 1039B View Post
Would it be entanglement if you just had two small robots tethered together with string so you could just separate and block the whOle field?
Without a doubt that would be entanglement.

I don't think wallbots are going to work this year because the field is pretty much open.
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  #180  
Old 04-30-2012, 12:17 PM
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Re: VEX Sack Attack Design Thread

Even if you don't have a full wallbot, a "mosquito bot" that goes under to the other side of the field, perhaps widens some, and buzzes around can still do quite a bit to slow down the opposing team.
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