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(Stupid) Weapon System Idea


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MoonSet416



Joined: 25 Sep 2016
Posts: 430
Location: Sydney


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(Stupid) Weapon System Idea

So I was talking to my friends about brushless motors the other day and an idea came up: Can we make spinning weapons more reliable by increasing the MOI/weight of the rotor/pulley assembly? My reasoning behind that being a heavier pulley-rotor assembly is harder for the drive belt to stop during a weapon impact and will have a bigger tendency to slip on the belt. This way the deceleration of the weapon motor might not be as abrupt as before and might give ESCs time to react.

One of the downsides though is that the weapon is a bit harder to spin up given the additional weight.

What do you guys think?

Post Sun Nov 19, 2017 4:03 pm 
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MoonSet416



Joined: 25 Sep 2016
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Location: Sydney


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BTW I plan to do that by adding two circular steel plates on the sides of my drive pulley. I'm guessing outrunners have similar effects due to their big rotors, but they are much harder to put into my current designs.

Post Sun Nov 19, 2017 4:14 pm 
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Nick
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It sounds good in theory but just having adjustable belt tension weighs very little and can easily be changed for testing
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Post Mon Nov 20, 2017 11:35 am 
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MoonSet416



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Yeah I agree...

Btw I wonder how do you usually determine if tension is enough/too much?

Post Mon Nov 20, 2017 12:29 pm 
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Nick
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When the belt falls off, there is definitely not enough tension Laughing. I like to have enough tension so that I can't see the belt slipping when the weapon spins up - having a camera with a high frame rate really helps with that.
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Post Mon Nov 20, 2017 2:28 pm 
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Knightrous
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Spend the weight on a bigger weapon motor Smile
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Post Mon Nov 20, 2017 5:37 pm 
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MoonSet416



Joined: 25 Sep 2016
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Location: Sydney


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Thanks for the suggestions guys...

On the topic of a bigger motor... What do you think would be a step up from the 4274 motors I'm using right now? (I'm considering using a single weapon motor in the future to reduce complexity, but I probably won't have the thickness for a large diameter one.)

Post Thu Nov 23, 2017 4:40 pm 
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maddox



Joined: 21 Dec 2006
Posts: 779
Location: Belgium


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A SK3 5055 or NTM 5060 are decent options for a size bigger.


But on topic for a "integrated motor/spinner/disk". Catharsis is one of the first machines to try it, and up to date it ain't the biggest succes known.

Nick is also working on setups like that, and he's going full hog with custom titanium shafts and so on.

Post Tue Mar 06, 2018 9:53 pm 
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MoonSet416



Joined: 25 Sep 2016
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Location: Sydney


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Thx for the info.

Post Wed Mar 07, 2018 7:09 pm 
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maddox



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Delivered with pleasure. Anything that improves our opponents is a good thing. it urges us to do even better.

Post Wed Mar 07, 2018 7:37 pm 
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MoonSet416



Joined: 25 Sep 2016
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Location: Sydney


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How does an active wedge (like the one on Sewer Snake) + pneumatic spear sound? The idea is to wedge the opponent, box rush, pin against wall, and expose the bottom armor to the spear.

Came up with this idea yesterday but I figured I would never have the resources/knowledge to make it real so if anyone wants it then feel free to grab it.

Post Tue Apr 24, 2018 5:58 pm 
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Ondray



Joined: 06 Jul 2015
Posts: 133
Location: Newcastle


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Before I started building I always wanted to build a spear bot, but it comes out more complex than you'd think and I don't think there's ever been a successful spear bot - it's too hard to put enough kinetic energy into a linear movement to do damage. Even axe bots struggle to do damage with the rotational movement.

But I'm happy to be proved wrong.

Post Wed Apr 25, 2018 7:09 pm 
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MoonSet416



Joined: 25 Sep 2016
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You are right, I don't think there's a spearbot that does actual damage, yet. Pointblank actually can do real damage, but it failed safety check twice for RobotWars. Hoever, with the aid of an active wedge, the spear can target the bottom panel, which is usually weak, and I guess in that case the bot wouldn't need a super powerful spear. (not that it would have the weight to do so after having an active wedge lol)

Post Wed Apr 25, 2018 11:02 pm 
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Glen
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Really keen for someone to actually show up to an even with one, i reckon the crowd would love it.
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Post Wed Apr 25, 2018 11:30 pm 
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