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marto
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Joined: 08 Jul 2004
Posts: 5442
Location: Brisbane, QLD


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Do the calcs and see how big a battery you would need. I haven't but I think its ... ah prohibitively large.
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Post Tue Mar 14, 2017 9:28 pm 
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chunkulator



Joined: 27 Jul 2016
Posts: 211


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About 9A. Should be able to get about 20 mins out of a 3Ah battery.

Post Tue Mar 14, 2017 9:30 pm 
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maddox



Joined: 21 Dec 2006
Posts: 757
Location: Belgium


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I was reacting on Glenn's posting with the huge sawblade on the flat pyramid.

So sorry if I do dissapoint you Richard.

Post Tue Mar 14, 2017 9:34 pm 
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chunkulator



Joined: 27 Jul 2016
Posts: 211


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Crap. Guess I'll have to think of something more hare-brained.

Post Tue Mar 14, 2017 9:37 pm 
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maddox



Joined: 21 Dec 2006
Posts: 757
Location: Belgium


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If you're wondering. Hydrogen Peroxide powered turbines are already been tought of and rejected.

Post Tue Mar 14, 2017 10:12 pm 
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Nick
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Joined: 16 Jun 2004
Posts: 11742
Location: Sydney, NSW


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Electromagnet clamping would be less effective for sportsman bots - many of them have plastic & aluminium armour.
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Post Tue Mar 14, 2017 10:20 pm 
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DumHed
Experienced Roboteer


Joined: 29 Jun 2004
Posts: 1219
Location: Sydney


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A cheap and quick alternative for electromagnets (maybe less powerful though) are trailer brake magnets:

http://www.ebay.com.au/itm/2-X-10-ELECTRIC-TRAILER-BRAKE-MAGNETS-OVAL-SHAPE-CARAVAN-CAMPER-/121585381756
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Post Wed Mar 15, 2017 7:32 am 
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chunkulator



Joined: 27 Jul 2016
Posts: 211


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My spring flipper Total Recoil will have an automatic "flip and reload" cycle controlled by a Teensy 3 microcontroller. Automatic loading can be enabled after load-in by using one of the switches on the remote. A trigger on the remote will cause it to release, after which it will automatically load again if the auto load switch remains on.

I'm going to say that this doesn't count as semi-autonomous as defined by rule 7 since it only reloads the weapon autonomously, only ever releasing it in response to a trigger from a human. Therefore I won't necessarily put any special lights on it (though I might if I get time) apart from the obligatory power light.

Does this sound like a correct reading of the rules Steve?

Post Tue May 16, 2017 10:27 pm 
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marto
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Joined: 08 Jul 2004
Posts: 5442
Location: Brisbane, QLD


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That sounds correct. However the teensy 3 will need to have failsafe. It should not attempt to reload or fire if loses signal should remain in whatever state it is currently in. There should also be a way to leave it uncocked at the end of the fight if possible.

Steve
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Steven Martin
Twisted Constructions
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Post Tue May 16, 2017 11:05 pm 
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chunkulator



Joined: 27 Jul 2016
Posts: 211


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Yep. It will be connected to the radio with a single CPPM bus connection and will also perform the drive mixing. As soon as the radio stops emitting CPPM it will be programmed to halt all motor activity.

In the case that the spring is left tensioned at the end of the match I can switch off auto reload and then fire the flipper before anybody enters the arena. I will also have a manual release procedure (stand on the flipper and kick the catch).

Post Wed May 17, 2017 6:34 am 
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