Peter Wallers Fleas

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Shakey
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Re: Peter Wallers Fleas

Post by Shakey »

HSOD's is 10g. :)

Still looking nice and scary!
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peterwaller
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Re: Peter Wallers Fleas

Post by peterwaller »

As I thought transfering the electronics across brought it up to 72 gms without a blade so I need to do some weight saving.
Each wheel, tyre, axel, gear and 3 M2.5 nuts used at present come out at 6 gms so I can save some there.
I found if you take an M2 nut and drill it out to 2mm and tap it to M2.5 they are about half the weight of an M2.5 nut so that could save the best part of a gram. A smaller gear also thinned down will also help plus designing a lighter wheel tyre combination so I might just about make it.
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Re: Peter Wallers Fleas

Post by peterwaller »

The weight problem wasn't quite as bad as I thought as I had a spinner hub on the motor weighing 4 gms that I hadn't realised was there.
Any way I saved 3 gms on the wheel and tyre redesign plus about 1.5 gms on the shaft gear and nut mods.
The new hub is fibreglass with a 1mm thick titanium blade and with new batteries which were about 0.5 gm heavier it has all come out at 75.3 gms.
I have been unable to include a lid but have managed some 0.75 mm polycarb armour around the front, wheels and sides.
Image
Image
The reach of the blade isn't as good as I was hoping for so will have to wait and see if it is any good in combat.
It doesn't need to be that great to improve on the old version.
Last edited by peterwaller on Fri Jul 21, 2017 7:35 pm, edited 1 time in total.
Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory »

*cries*
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Re: Peter Wallers Fleas

Post by Remote-Controlled Dave »

That's a great looking thing.
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Re: Peter Wallers Fleas

Post by Hogi »

well, it doesn't look like i'll be deffending my FWS title very effectively then :)
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Re: Peter Wallers Fleas

Post by peterwaller »

I have been having a play with a modified walking mechanism.
As Rory said in the nano section three legs per side gives a much better walk but it is more difficult to get the three feet that dont clash.
What I have done is have the first two feet as normal one outside and one inside and then put a 3mm offset in the third leg so the third foot is outside the second.
Here is a mockup in action.
http://youtu.be/jYOoHswrers
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Re: Peter Wallers Fleas

Post by Rapidrory »

That looks very promising. One advantage of the 3 leg system is that it can be stably run at much higher speeds than 2 legs, giving the robot similar speed and maneuverability to that of a wheeled robot... So, cue massive spinner walker thing from Pete? A heavy undercutter would be a truly terrifying beast :P
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peterwaller
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Re: Peter Wallers Fleas

Post by peterwaller »

It cant be too heavy this if the Flea section.
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Re: Peter Wallers Fleas

Post by peterwaller »

Adding the third foot on the outside was making it too wide so I have flipped it to the inside.
Here I have moulded some silicone rubber feet onto the legs.
Image
And here the legs are mounted on a 3D printed frame to check the walking.
http://youtu.be/rGi0D-vwqDk
Last edited by peterwaller on Fri Jul 21, 2017 7:37 pm, edited 1 time in total.
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