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Unread 19-01-2011, 13:12
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Re: Minibot climb rate

Use encoders with a 15 foot cable and leave the NXT at the ground for testing purposes. Minimal impact on the robot, enough to get good data.
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Unread 19-01-2011, 13:28
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Re: Minibot climb rate

Quote:
Originally Posted by Chris is me View Post
Use encoders with a 15 foot cable and leave the NXT at the ground for testing purposes. Minimal impact on the robot, enough to get good data.
Good suggestion!
Alternatively, shorter wires and move the NXT along side by hand. Either way, any data you get is better than guessing.
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Unread 19-01-2011, 13:35
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Thumbs up Re: Minibot climb rate

Quote:
Originally Posted by Duke461 View Post
Our mini bot got to the top of the pole today in 4 seconds. I'd love to share the video, but its "Top secret Confidential" stuff right now
wow congrats that quick ha ha top secret what about gracious professionalism just kidding just wondering what parts you are using
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Unread 19-01-2011, 13:42
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Re: Minibot climb rate

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Originally Posted by bearbot View Post
wow congrats that quick ha ha top secret what about gracious professionalism just kidding just wondering what parts you are using
Nothing in GP says a team has to publicly share designs, keeping a competitive edge will be especially crucial in regards to the minibot as many will be easily within range of being duplicated.
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Unread 19-01-2011, 17:18
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Re: Minibot climb rate

I have a question regarding the minibot and this seems to be the best place to ask it. Sorry if that's not correct.

R92 specifically mentions the following 2 adhesives.
G. Polycarbonate glue
R. PVC cement or cleaner

Does this really mean nothing else can be used? I'm thinking that exactly what that means, but I would like some more input.

If we indeed can only use these two adhesives and nothing else... In my limited experience, the PVC cement is not very useful on anything but PVC and/or CPVC. The "Polycarbonate glue" seems have different varieties available and some of those look like they might be useful for attaching other items on the minibot list to each other. However, it sure would be nice to just whip out the contact cement or silicone if it's kosher to do so.

Thanks for any input in advance.
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Unread 19-01-2011, 17:21
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Re: Minibot climb rate

Quote:
Originally Posted by bearbot View Post
wow congrats that quick ha ha top secret what about gracious professionalism just kidding just wondering what parts you are using
I will give one hint: Surgical Tubing is being used. And yes, it does comply with the rules
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Unread 19-01-2011, 17:25
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Re: Minibot climb rate

Quote:
Originally Posted by budzilla View Post
I have a question regarding the minibot and this seems to be the best place to ask it. Sorry if that's not correct.

R92 specifically mentions the following 2 adhesives.
G. Polycarbonate glue
R. PVC cement or cleaner

Does this really mean nothing else can be used? I'm thinking that exactly what that means, but I would like some more input.

If we indeed can only use these two adhesives and nothing else... In my limited experience, the PVC cement is not very useful on anything but PVC and/or CPVC. The "Polycarbonate glue" seems have different varieties available and some of those look like they might be useful for attaching other items on the minibot list to each other. However, it sure would be nice to just whip out the contact cement or silicone if it's kosher to do so.

Thanks for any input in advance.
Welcome to Chiefdelphi!

As you will see mentioned in many threads here, the official answers to rules questions can only be provided through the Q&A system. Additionally, refinements to the rules come out in the Team Updates as well. All we can do here is give our opinions based on the rules.

Strictly speaking, I do not believe <R92> allows the use of any glue other than the two mentioned. One other place to check is in the Tetrix catalog linked in Team Update #3. If it is not listed in either place, then it most likely will not be allowed.
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  #83   Spotlight this post!  
Unread 19-01-2011, 17:31
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Re: Minibot climb rate

Quote:
Originally Posted by TGA Reaper View Post
Question: What is the estimated ideal weight for the mini bot?
less than 5 pounds, so somewhere between 1-4 pounds will be good.
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Unread 19-01-2011, 17:54
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Re: Minibot climb rate

Quote:
Originally Posted by billbo911 View Post
Strictly speaking, I do not believe <R92> allows the use of any glue other than the two mentioned. One other place to check is in the Tetrix catalog linked in Team Update #3. If it is not listed in either place, then it most likely will not be allowed.
I agree. BTW, thanks for the welcome. I'm a long time lurker, 1st time poster.

You are welcome for all the fish and thank you for all the input.
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Unread 19-01-2011, 18:21
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Re: Minibot climb rate

But wouldn't surgical tubing that was wound up before deployment be considered stored energy? Otherwise you could just have a motor running and solely rely on the surgical tubing to launch you up the pole.
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Unread 19-01-2011, 19:34
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Re: Minibot climb rate

Quote:
Originally Posted by Patrick Seeney View Post
But wouldn't surgical tubing that was wound up before deployment be considered stored energy? Otherwise you could just have a motor running and solely rely on the surgical tubing to launch you up the pole.
Surgical tubing that does not contribute to the vertical motion of the robot is allowed. The best exampe I can think of is a surgical tubing tied gate latch.
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Unread 19-01-2011, 21:05
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Re: Minibot climb rate

huh?
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Unread 19-01-2011, 22:43
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Re: Minibot climb rate

In that case I get it, it is going to come down to the deployment. Our current version of the mini bot can get up the pole in under 4 seconds, but it is still in the early testing stages. We have talked using surgical tubing in the delivery method...but like I said we are still working on which of our two gripper prototypes we want to proceed with.
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Unread 20-01-2011, 13:11
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Re: Minibot climb rate

Quote:
Originally Posted by Duke461 View Post
Our minibot got to the top of the pole today in 4 seconds. I'd love to share the video, but its "Top secret Confidential" stuff right now
we're now down to the 3-3.5 second range, and I think we could get under three with some more design tweaks and lightening. The design is still top secret, but I will tell you that it uses parts in intresting ways...
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Unread 20-01-2011, 13:46
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Re: Minibot climb rate

I'm calling shenanigans on a minibot under 3 seconds. Reliably deploying and shutting off while making the climb in under 3.5 seconds is even improbable @ 14V, perfect peak power, and the minimum 3.5lbs it takes for the battery, motors, switches, [custom] wheels, and just 1 ft. of attachment structure held together with magic (or rivets...).
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