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  #31   Spotlight this post!  
Unread 12-01-2017, 17:41
Boltman Boltman is offline
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Re: Gears on the floor?

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Originally Posted by TroyCDH View Post
2450 did some CAD modeling to pick up the gear. I wish the gear had a large chamfer to get a "dustpan" under it while laying flat. Fairly sharp corner on carpet that probably cant be scooped up.

Ideas welcomed.
I think a 3-4 finger claw mechanism that grabs and then puts in position to score might be good and not too hard, sensor for contact...detect , drop , contract fingers ,hold, raise , place , expand fingers, score look at garbage picker uppers for inspiration.
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Last edited by Boltman : 12-01-2017 at 17:44.
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Unread 12-01-2017, 18:50
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Re: Gears on the floor?

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Originally Posted by Boltman View Post
I think you might be underestimating Vision and defense..... going to exact same spot is of course a tendency and you can be if you are very effective at gear collection that tendency will be used against you and slow you down a lot when you need 6...at least with floor the pickup point will be different and you could have several gears laying on floor pretty sure you can chuck the gears out at a high rate forcing them away from the retrieval area and being more unpredictable in picking them up

Only downside (with scoops) I see to floor pickup is trying to no get messed up with balls which will be prevalent
Similar issues were prevalent in 2013. Who's going to be dropping all this gears anyway? It's not like they are being shot into the air. More than likely they will get stuck into the corners of the air ship surrounded by balls that missed the boiler. Sounds like a pain to pick up to me. I mean sure it's doable and if your team can pull it off that's great but is it really a good use of time?
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Unread 12-01-2017, 18:59
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Re: Gears on the floor?

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Originally Posted by mman1506 View Post
Similar issues were prevalent in 2013. Who's going to be dropping all this gears anyway? It's not like they are being shot into the air. More than likely they will get stuck into the corners of the air ship surrounded by balls that missed the boiler. Sounds like a pain to pick up to me. I mean sure it's doable and if your team can pull it off that's great but is it really a good use of time?
18 gears to floor simple by your HP you can dump balls anytime same for gears
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Unread 12-01-2017, 19:03
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Re: Gears on the floor?

https://www.chiefdelphi.com/forums/portal.php?
I dont think that there is going to be many gears just lying around on the floor and it would be a waste of time to build a collector.
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Unread 12-01-2017, 21:41
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Re: Gears on the floor?

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Originally Posted by IndySam View Post
FRC Design rule #4 you must be able to pickup your primary scoring object off of the floor.
Newer team wishes to know more about FRC Design Rule #4. I haven't come across any FRC Design Rules. Where can I find this reference, please? Your rule #4 makes sense and am wondering about the golden nuggets in the other rules.
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Unread 12-01-2017, 21:53
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Re: Gears on the floor?

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Originally Posted by paul.dornfeld View Post
Newer team wishes to know more about FRC Design Rule #4. I haven't come across any FRC Design Rules. Where can I find this reference, please? Your rule #4 makes sense and am wondering about the golden nuggets in the other rules.
I would say it's one of Karthik's rules, not an FRC rule per se. I don't have a link to Simbot Strategy right now, though... If you get a chance, watch the presentation.
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Unread 12-01-2017, 22:28
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Re: Gears on the floor?

I just wanted to share my disappointment after noticing how nicely the gears roll and then coming to the rule disallowing a mechanism to roll gears from across the field. The GDC has made me so cynical that whenever I imagine a winning robot I quickly think, "the GDC likely outlawed it" and usually I'm right, unfortunately.
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Unread 12-01-2017, 22:43
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Re: Gears on the floor?

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Originally Posted by EricH View Post
I would say it's one of Karthik's rules, not an FRC rule per se. I don't have a link to Simbot Strategy right now, though... If you get a chance, watch the presentation.
Remember 1114's awesome floor pickup in 2013? But seriously, I'm more worried about getting called for herding when there's a stupid gear in the way.
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Unread 12-01-2017, 23:35
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Re: Gears on the floor?

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Why bother?
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Unread 13-01-2017, 00:27
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Re: Gears on the floor?

Made a wood chassis and a wood apparatus. We can pick gears up off the floor! Prototype human motions are simple 90 degree "door" rotation and a peg that slides forward and back.

Geometry figured so the same apparatus delivers the gear to the spring peg.

With some more work we can add a chute to get a gear from the human at the wall.

2450
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Unread 13-01-2017, 00:41
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Re: Gears on the floor?

Quote:
Originally Posted by paul.dornfeld View Post
Newer team wishes to know more about FRC Design Rule #4. I haven't come across any FRC Design Rules. Where can I find this reference, please? Your rule #4 makes sense and am wondering about the golden nuggets in the other rules.
It's not even particularly good advice. Sometimes you don't need floor pickup of the primary scoring piece. The example cited by others in this thread is 1503's 2011 robot (In this video they are the red robot closest to the camera at the start of autonomous). Note how they made a simple and elegant mechanism and are able to cycle quickly and effectively. I would say they were a better robot than 99% of other teams. Floor acquisition and delivery to a scoring mechanism is a perennially difficult challenge that can be sidestepped by using the predictably placed hoppers/chutes/etc there are on the field. Of course, it's always better to have than not have, but in the context of the monetary, time, and complexity budgets nixing it is something that is certainly worth considering. Two weeks of driver practice, a working autonomous and fewer bugs is worth more than floor pickup to most teams.

Last edited by Grim Tuesday : 13-01-2017 at 00:48.
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Unread 13-01-2017, 01:15
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Re: Gears on the floor?

Quote:
Originally Posted by TroyCDH View Post
2450 did some CAD modeling to pick up the gear. I wish the gear had a large chamfer to get a "dustpan" under it while laying flat. Fairly sharp corner on carpet that probably cant be scooped up.

Ideas welcomed.
We actually had luck with putting the intake roller on the bottom (with the polycarb sheet above) rather than on top or outwards. Just make sure the tread or whatever you line your roller with is extra grippy and the roller doesnt have a massive diameter(ours were about 1"). Although, as far as tread is concerned, I think wedgetop worked fine for us....
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Last edited by BumblingBuilder : 13-01-2017 at 01:22.
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Unread 13-01-2017, 01:24
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Re: Gears on the floor?

Quote:
Originally Posted by TroyCDH View Post
2450 did some CAD modeling to pick up the gear. I wish the gear had a large chamfer to get a "dustpan" under it while laying flat. Fairly sharp corner on carpet that probably cant be scooped up.

Ideas welcomed.
We put the gear on a flat surface, and saw a very tiny space between the gear teeth and the ground. So while the gear doesn't have a large chamfer, it may have a small one. Using a very thin pan worked for us, but sometimes it does get jammed so alternatives are welcome.
Quote:
Originally Posted by BumblingBuilder View Post
We actually had luck with putting the intake roller on the bottom (with the polycarb sheet above) rather than on top or outwards.
How do the gears go in then? Is the whole thing tilted downwards?
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Unread 13-01-2017, 01:29
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Re: Gears on the floor?

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Originally Posted by Chak View Post
How do the gears go in then? Is the whole thing tilted downwards?
Yes. Our intake was at an angle downwards, and the roller propelled it up the slope of the intake. With polycord strung across more rollers, I would imagine it would have continued to be guided up the slope
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Unread 13-01-2017, 09:15
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Re: Gears on the floor?

Quote:
Originally Posted by TroyCDH View Post
Made a wood chassis and a wood apparatus. We can pick gears up off the floor! Prototype human motions are simple 90 degree "door" rotation and a peg that slides forward and back.

Geometry figured so the same apparatus delivers the gear to the spring peg.

With some more work we can add a chute to get a gear from the human at the wall.

2450
I would suspect that it's just faster to let the HP drop the gear on the floor for you. I think we won't be doing gear pickup, but if we were, i'd only get from the floor, and I'd do the picking up while already driving back to the airship.
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