Nanoweight Parts

If Fleaweights are just too big...

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Rapidrory
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Nanoweight Parts

Post by Rapidrory »

These have mostly been posted before, but I felt it could do with a separate thread to consolidate a list of part sources and design ideas for Nanos. Here are some of the ideas posted so far:

Drive motors:
Micro servos
Cheap, light weight, can use servo board as ESC, but requires hacking for full rotation: http://www.hobbyking.com/hobbyking/stor ... duct=28406

Micro worm gear motors
Very cheap, but relatively heavy and requires some modification: http://www.ebay.co.uk/itm/5pcs-DC-3v-5v ... 2c862098c9

Micro planetary gear motors 1
More expensive and requires some modification, but very small: http://www.ebay.co.uk/itm/6mm-micro-gea ... 4233&rt=nc

Micro planetary gear motors 2
Very expensive, but requires no modification and there are matching wheels available. http://www.technobotsonline.com/solarbo ... motor.html

ESCs

Hacked servo boards
Most small analog servo boards will work as ESCs for the motors listed above once the potentiometer is replaced with fixed resistors. Very cheap.

Deltang
A very small Rx with dual ESC built in. More expensive though: http://www.deltang.co.uk/rx43d.htm

NanoTwos
As yet untested in Nanos, but will work with a LemonRx: http://robotwars101.org/forum/viewtopic ... 8&start=75

Batteries

NanoTech 60mAh
Cheap and lightweight single cell; suitable for most Nanos: http://www.hobbyking.com/hobbyking/stor ... duct=63088

Micron Full River Batteries
Slightly more expensive, but are available in smaller sizes than the NanoTech range: http://www.micronradiocontrol.co.uk/lipo_fullriver.html

Chassis/Armour

3D printing
Fine if you have access to a 3D printer, otherwise can be expensive

1mm HDPE/ polycarb
More than enough strength and rigidity on Nanoweight scales. Could probably easily go even thinner

0.25mm HDPE from plastic milk bottles
Not really rigid enough for a chassis, but makes good armour


If anyone has any further suggestions, feel free to add them!
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc

Rapidrory
Posts: 1160
Joined: Sun Nov 24, 2013 9:54 pm

Re: Nanoweight Parts

Post by Rapidrory »

Found a supplier for the tiny power switches I use (My ones are nicked off old circuit boards)
http://www.aliexpress.com/item/On-Off-2 ... 10061.html
or
http://www.aliexpress.com/item/On-Off-2 ... 16156.html
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc

Hogi
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Location: basingstoke

Re: Nanoweight Parts

Post by Hogi »

what wheels would fit on the servos Rory suggested? i'm going to build a nanoweight around christmas time i think. it'll just be a 2WD pusher job i think. i just thought i'd better have something given the fact i'm building a nanoweight arena.
Last edited by Hogi on Fri Oct 10, 2014 5:35 pm, edited 1 time in total.
Daniel Jackson.

Team Hectic.

Many antweights

Super antweights: territorial.

Fleaweights: fleadom fighter, gaztons.

Featherweights: hectic (under construction)

Rapidrory
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Re: Nanoweight Parts

Post by Rapidrory »

I just cut little circles of 1mm polycarb out, glue them to the servo horn, and then fit a slither of neoprene cable sleeve as a tire... but you can use anything really as long as it's round and has a ~1mm hole in the middle; all you need to be able to do is fit the screw that comes with the servo through it so you can screw it onto the servo shaft.
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc

Hogi
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Re: Nanoweight Parts

Post by Hogi »

thanks. i'll use 1mm HDPE and then find something to use as a tyre. would duct tape be of any use?
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: Nanoweight Parts

Post by Rapidrory »

Double sided sticky tape might be better...
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

NanoTwo Motor Controllers: https://nutsandbots.co.uk/product/nanotwodualesc

Hogi
Posts: 1002
Joined: Sun Dec 30, 2012 6:47 pm
Location: basingstoke

Re: Nanoweight Parts

Post by Hogi »

i've got that too. i can do that. i could even stick sand paper on the wheels. that should give some grip. how much speed can you get out of those servos?
Daniel Jackson.

Team Hectic.

Many antweights

Super antweights: territorial.

Fleaweights: fleadom fighter, gaztons.

Featherweights: hectic (under construction)

Tashic
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Joined: Tue Jun 17, 2014 11:22 pm

Re: Nanoweight Parts

Post by Tashic »

I used cutted bike air chambers for thin tyres before and they are ok.

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peterwaller
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Re: Nanoweight Parts

Post by peterwaller »

Elastic bands work quite well and are cheap and easily available.
If you can get some small enough you wont need to cut and join them.
On a slightly different subject I have been looking and some small 6mm diam gearmotors on ebay that I think Rory posted about.
http://www.ebay.co.uk/itm/131285034976? ... EBIDX%3AIT
The problem is that they are only 47rpm and so too slow but looking at the photos the gearboxes are three stage epicyclic and they have a 700:1 ratio. Now I don't know much about calculating gear ratios on these type of gear box but assuming each section is the same they come out to around 9:1 each so if I can lock up one section that should give me around 400rpm which is ideal.
So I have ordered some to try as at £3.99 they are considerably cheaper then the ones in Alsoran.
I will let you know if they work out or not.

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peterwaller
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Re: Nanoweight Parts

Post by peterwaller »

Its funny how things work out the motors arrived but they are not quite the same as the photographs but more like the drawing with the gearbox being longer than the motor coming out to just about 25mm total length including tightly bent wires and 1.5gms .
Instead of a three stage epicyclic gearbox it is a four stage one so the gear ratio of each section is nearer 5.2:1.
Fortunately the motors are nearer 75rpm as they come so by locking up one section I seem to have ended up with 400rpm anyway.
The gear boxes are a bit trickey to open but I have moded two and they seem to have a reasonable torque and are much smaller lighter and easier to fit in than my other motors.
What I did was take out the 4 sets of gear carriers and on the output one I removed the three tiny planet gears.
I then put a small blob of epoxy on the output gear of the next carrier so it became one with the output carrier.
Then quickley reassembled and made sure it all ran before the epoxy set off.

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