Another New Nanoweight...

If Fleaweights are just too big...

Moderators: BeligerAnt, petec, administrator

Post Reply
User avatar
peterwaller
Posts: 3213
Joined: Fri Feb 15, 2002 12:00 am
Location: Aylesbury Bucks
Contact:

Re: Another New Nanoweight...

Post by peterwaller »

That is brilliant having three legs on each side seems to greatly improve the walking compared to the two I have used in the past.
When I think how many hours I have spent in the past machining cranckshaft when all I needed was a bent paper clip.
I had dug out some of my old crankshafts but because each crank was 2mm the narrowest lathe tool I had they are way to wide for a Nano.
Image
Might just have to think about copying that idea.
Rapidrory
Posts: 1160
Joined: Sun Nov 24, 2013 9:54 pm

Re: Another New Nanoweight...

Post by Rapidrory »

Feel free, although it's a lot trickier than it looks; took me 4 attempts to get one right...
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc
Remote-Controlled Dave
Posts: 3716
Joined: Sun Apr 03, 2005 5:30 pm
Location: Antrim, Northern Ireland
Contact:

Re: Another New Nanoweight...

Post by Remote-Controlled Dave »

How many snapped paperclips?
Die Gracefully Robotics
Winner - AWS 39
Rapidrory
Posts: 1160
Joined: Sun Nov 24, 2013 9:54 pm

Re: Another New Nanoweight...

Post by Rapidrory »

Yeah, I chose three legs as it was the minimum number that would give a nice smooth walking motion. It's also using the silicon insulation off wire on the feet to reduce bounce and add some grip.
We had this thing charging round the attic floor for about half an hour yesterday; it's great over obstacles and though the legs got jammed once or twice, that was easily fixed by just reversing the motor briefly. Over all I'm very happy with how the design turned out. If I do it again I'll probably use slower motors though; this one could run them at about half speed before getting erratic, however this made steering kinda twitchy. I was using a Blade so couldn't wind down the travel adjust. I might try with some of those little single speed hacked worm gear motors for my actual Nano walker (which'll hopefully fit in the cube :L).

None of them snapped, just trying to get the geometries of each section of the cam equal was a pain; once it was folded there was little you can do to correct it, so it was just a case of starting again from scratch. Annoyingly the first one I did was perfect, the other one took me about 2 hours (most of which was spent learning that correcting an error was futile :p )

If i do do an ant walker, i'm going to need some bigger steel rod... I wonder if they do novelty grade paper clips? :L
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc
Remote-Controlled Dave
Posts: 3716
Joined: Sun Apr 03, 2005 5:30 pm
Location: Antrim, Northern Ireland
Contact:

Re: Another New Nanoweight...

Post by Remote-Controlled Dave »

Garden wire or piano wire.
Die Gracefully Robotics
Winner - AWS 39
Hogi
Posts: 1002
Joined: Sun Dec 30, 2012 6:47 pm
Location: basingstoke

Re: Another New Nanoweight...

Post by Hogi »

i am aiming to get a fleaweight walker into the arena at some point. the idea is to use my mechanism design for the old ant walker project but on a slightly smaller scale. i'm hoping i'll have enough weight left to add an antweight sized servo running at full voltage with an axe on the end. could be quite effective if i can make it work.
Daniel Jackson.

Team Hectic.

Many antweights

Super antweights: territorial.

Fleaweights: fleadom fighter, gaztons.

Featherweights: hectic (under construction)
Rapidrory
Posts: 1160
Joined: Sun Nov 24, 2013 9:54 pm

Re: Another New Nanoweight...

Post by Rapidrory »

Ah cheers Dave. Any idea which is stiffer? or are they both just mild steel?
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc
Remote-Controlled Dave
Posts: 3716
Joined: Sun Apr 03, 2005 5:30 pm
Location: Antrim, Northern Ireland
Contact:

Re: Another New Nanoweight...

Post by Remote-Controlled Dave »

Garden wire comes in different grades. Some of it is too flexible but the thinner grade stuff I made a robot out of before would've been great for it. And I know piano wire is the stuff Peter uses for 'spindly bits' like the mechanism on Tarantula so that should be good.

I build this abomination out of garden wire:
http://buildersdb.com/botpics/6296.jpg
Die Gracefully Robotics
Winner - AWS 39
Rapidrory
Posts: 1160
Joined: Sun Nov 24, 2013 9:54 pm

Re: Another New Nanoweight...

Post by Rapidrory »

I put together a prototype for the Nano kits today... Not sure I'm hugely happy with it though. It's using a V-Tail mixer and two servo boards as the controller, all bound up with a Lemon Rx. I mean it works fine, but was very fiddly to make in comparison to the servo drive setups, and more concerningly, it's quite bulky and weighs about 15g with a switch and 50mAh battery (not included).

Image
Image

I could go back to the first-gen hacked servos as used in shark bait or this too shall fail, which are very light but quite slow, or carry on with this setup which is heavier but has the powerful drive units... I don't really want to keep stock for both types.. What do you guys think?
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc
Remote-Controlled Dave
Posts: 3716
Joined: Sun Apr 03, 2005 5:30 pm
Location: Antrim, Northern Ireland
Contact:

Re: Another New Nanoweight...

Post by Remote-Controlled Dave »

Does it NEED a switch?

I like the little servo things. Shark Bait runs well enough, even though it is slow.
Die Gracefully Robotics
Winner - AWS 39
Post Reply