Haz's beetles.

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haz
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Haz's beetles.

Post by haz » Fri Jan 24, 2014 8:25 pm

Hiya peoples.

Starting a new topic for my beetle builds, as the beater has had rather a radical design change and one is a totally new robot.

Looking at where Eggbeater failed last time (there was a lot to look at :oops: ) I changed my design accordingly. Its now a bit of a dominant mode/cake clone or generic drum spinner shape.
Having faster, more powerful motors before will help it not eat motors/gearboxes like the last one did and not having 80mm wheels will result in less motor death too I hope. These motors are a lot faster, and won't be having a massive overvolt to get speed out of them, like I did with the old MFA ones. They are the 12v 1000rpm motors off ebay run off 3s.
4wd (belt driven front ones) should improve the driving ability and give it a nice enough look. The frame is still nylon, but 10mm thick, probably with pockets or other lightening. The rest is a mix of thin titanium, thin aluminium and thicker aluminium. Will be pretty easy prey but then it will make a spectacular show :P Just got to keep the massive weapon pointed at the opponents.... good plan that :roll:
Weapon felt nicely powerful in the last version but lacked omph. Felt a bit slow. will change the gearing from 3:1 to about 1.5:1 or even 1:1. Changing to a long can 28mm outrunner with a bumload of kv, torque and power may happen.
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Over the last few days I've been piddling around with the idea of a lifter. Big ass servo, super legit 4wd with more 1000rpm ebay motors.
Pushed parts around in "CAD" (i.e. sketchup) and got a shape I like. Similar to Eggbeater because coolness and because it saves money on materials lol. 10mm nylon frame, 1mm titanium, 10mm and 5mm aluminium. Probably some chopping board/HDPE keep away plates somewhere. Still got a lot of work to do here, like figure out servo placement and linkages etc (using a motor is a possibility)
ATM planning to run 3s in the robot, could up it to 4 but space is an issue. Wonder if the 10a botbitz would be happy with 4 motors?
Got wedges/skirts to add to the lifter. I know it will be mostly spinner fodder. Building it for the challenge and because I really like the look over srs bidness winning robut.
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Hope to have both running at Whitwick. Will stick build pics up as and when they happen.

Cheers. Haz.

haz
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Re: Haz's beetles.

Post by haz » Sat Feb 08, 2014 7:14 pm

http://www.youtube.com/watch?v=2tgOVf0m ... e=youtu.be

Got the frame started, pretty pleased so far. Have yet to weigh anything.

Harry

haz
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Re: Haz's beetles.

Post by haz » Tue Feb 11, 2014 9:27 pm

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Here is the new version before I worked on it today. Frame is 10mm chopping board (I know, a bad idea but I can't really afford different yet) the motors are 1000rpm ones from ebay. The pulleys are custom made by Ellis. The "belts" in the picture are hair bands because I didn't have anything else to hand.


Here is a untouched pulley next to the one I milled a hex onto. Reason for doing this is so it can fit onto banebots wheels because the adaptors are too expensive for me. It also has a grubscrew in it to hold it onto the D shaft of the motors.
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Did all four and made up some belts. The stuff is basically O ring material but I cut it to length and then joined it with a soldering iron. Works well!

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That's where I'm at so far. Need to get the armour made and mount and wire in the electrics.
Should be interesting to see when it's finished and see if it performs ok for a chopping board robot powered by £10 motors :)

Cheers. Harry

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bitternboy
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Re: Haz's beetles.

Post by bitternboy » Wed Feb 12, 2014 9:14 am

May I be the first to say that is a thing of beauty :P
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playzooki
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Re: Haz's beetles.

Post by playzooki » Wed Feb 12, 2014 7:31 pm

I like it

haz
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Re: Haz's beetles.

Post by haz » Wed Feb 12, 2014 8:22 pm

Cheers guys :)

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Re: Haz's beetles.

Post by haz » Sun Feb 23, 2014 6:21 pm

http://www.youtube.com/watch?v=z5ALNYcV ... e=youtu.be

Made a motor mount and got it spinning up.

playzooki
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Re: Haz's beetles.

Post by playzooki » Sun Feb 23, 2014 6:53 pm

Will be interesting to see it fight, nice work

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limpet
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Re: Haz's beetles.

Post by limpet » Wed Mar 05, 2014 9:19 pm

Saw it in the flesh at Whitwick, looks very promising.
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haz
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Re: Haz's beetles.

Post by haz » Thu Apr 17, 2014 7:20 pm

Started a drive all day beetleweight today

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weighs as much as the beater on the other one and even with the overkill battery its still <700g

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Showing I can build sensible sized robots should I want to!

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This will probably get adapted for 4 bar-ness when I get some time to tinker. Speed looks to be just over 2 m/s with the foam wheels I have planned.

Cheers!

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Re: Haz's beetles.

Post by Hogi » Tue Apr 22, 2014 9:15 am

very nice indeed haz! hope i get to see it do battle at some point.
Featherweight under construction.

Antweight to build list: 4Wd lifter, new clusterbot, secret project, walker of some description.

Team Hectic.

haz
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Re: Haz's beetles.

Post by haz » Fri Jun 13, 2014 8:13 pm

Had some time to spare this afternoon so I started on a beetle to replace Eggbeater for the time being. Undercutter thing.

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Made the holder for the weapon bearings. Yeah I'm live shafting, because it's much easier for me to do.

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Front bit, will mount motors off here and other stuff. Will be going for the generic T style I think.

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bolted together and with vague parts layout. Unsure of what weapon will be. I kinda want a single tooth disc, but then I run into the cost of watercutting etc. I'll probably either cut a flat bar out of hardox or make a thick blocky one out of mild or stainless.

Want to make it reliable as hell. Toying with the idea of an interchangeable saw blade or something that isn't a KE dump depending on opponent.

haz
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Re: Haz's beetles.

Post by haz » Mon Jun 16, 2014 5:00 pm

Some more happened with this thing.

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Single tooth disc, printed a card version out 1:1 and cut it out. Real one will be hardox.


Made some bracing to stop breakage too, 15mm aluminium, same grade as the frame.

Image

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Remote-Controlled Dave
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Re: Haz's beetles.

Post by Remote-Controlled Dave » Tue Jun 17, 2014 12:50 am

Attack of Bigger Thing
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haz
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Re: Haz's beetles.

Post by haz » Tue Jun 17, 2014 10:27 am

Yes. That. Very that.

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