Peter Wallers Fleas

All things small and scratchy.

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Shakey
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Re: Peter Wallers Fleas

Post by Shakey » Wed Feb 04, 2015 9:58 pm

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 » Thu Feb 05, 2015 8:20 pm

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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peterwaller
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Re: Peter Wallers Fleas

Post by peterwaller » Sat Feb 07, 2015 2:49 pm

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.

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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Sat Feb 07, 2015 3:37 pm

*cries*
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Remote-Controlled Dave
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Re: Peter Wallers Fleas

Post by Remote-Controlled Dave » Sat Feb 07, 2015 5:38 pm

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

Post by Hogi » Wed Feb 11, 2015 4:37 pm

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 » Thu Mar 05, 2015 2:30 pm

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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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Thu Mar 05, 2015 11:58 pm

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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Re: Peter Wallers Fleas

Post by peterwaller » Fri Mar 06, 2015 8:56 am

It cant be too heavy this if the Flea section.

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Re: Peter Wallers Fleas

Post by peterwaller » Sat Mar 07, 2015 2:49 pm

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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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Sat Mar 07, 2015 2:54 pm

Very nice and smooth. And comical... very comical :P
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Re: Peter Wallers Fleas

Post by Remote-Controlled Dave » Sat Mar 07, 2015 6:01 pm

Wow, that's impressive. I hope you plan to do an ant sized one too? Or a cluster of with 2 walking fleas...
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Re: Peter Wallers Fleas

Post by peterwaller » Mon Mar 09, 2015 4:26 pm

I just need to get a Fleaweight for the AWS first.
Had to redesighn the legs so they were shorter and held the silicone rubber feet better.
Now looking at the chassis I am trying black PLA instead of the red ABS.
Here is the walking set to run as slow as I could to give a better idea of the sequence.
http://youtu.be/Gqf3oNUwOb8
Also a shot of the underside which gives an idea of how it fits the 3 inch cube and the eventual weapon configuration.
Image
Last edited by peterwaller on Fri Jul 21, 2017 7:38 pm, edited 1 time in total.

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Rapidrory
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Re: Peter Wallers Fleas

Post by Rapidrory » Mon Mar 09, 2015 4:46 pm

It worries me that you're using the same brushless motor that is in Bad Idea.. Those things have some serious power! Though be warned, the mounts on that motor are very fragile. That's why Bad Idea has bearings either side of the motor to take the force of the hits; I tried it at quarter power without the extra motor mounts, and it snapped two of the mounting legs.
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Re: Peter Wallers Fleas

Post by Remote-Controlled Dave » Mon Mar 09, 2015 4:48 pm

Its great
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