Nanoweight Parts

If Fleaweights are just too big...

Moderators: BeligerAnt, petec, administrator

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

Re: Nanoweight Parts

Post by Rapidrory »

Ah, that's good to know that works; I might have to get some soon..
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

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

User avatar
joey_picus
Posts: 1137
Joined: Tue Jan 13, 2009 1:51 pm
Location: Lancaster, Lancashire
Contact:

Re: Nanoweight Parts

Post by joey_picus »

I had been looking for some parts for these sized robots for a while; I'd actually made some enquiries about establishing a 20-30g weight class a few years back but was unaware how many other people had been thinking the same thing until today :) but I went through my browser history after getting home and found these:

http://www.motionco.co.uk/motors-micro- ... 54_55.html

I'll order a couple for further testing, but from what I can see they might be potentially suitable due to the fact you can get a 200rpm version (which would be fast enough to use without further modification). Unfortunately at £10 each they're not the cheapest (although still better than Technobots!)

Mindsets Online ( http://www.mindsetsonline.co.uk/Site/Home ; formerly MUTR) are also worth a mention, although I imagine most people know of them already; they do small quantities of lots of different and interesting materials including carbon fibre sheet and cloth, and if you get bored you can order some 'e-textile' stuff and try and do something better than the idiots from television's The Bloody Apprentice managed a couple of weeks ago...
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
"These dreams go on when I close my eyes...every second of the night, I live another life"

User avatar
joey_picus
Posts: 1137
Joined: Tue Jan 13, 2009 1:51 pm
Location: Lancaster, Lancashire
Contact:

Re: Nanoweight Parts

Post by joey_picus »

Related to the above, the 200rpm motors arrived today (see attachment) and seem to be quite suitable for nanoweights;

> The dimensions more or less match what the website says, and from a brief test with a 1 cell lipo so does the speed.
> The output shaft does seem to be a little loose (is that normal?) but should be fine for normal running; also it seems to be some sort of metal, possibly bronze.
> One thing I didn't expect was for each of the motors to come in their own little shipping capsule :)

I'm still waiting for a few other parts but when those arrive I'll start building (and probably move onto my own thread, sorry!). One thing I am struggling with is wheels - it seems that even really tiny model aircraft ones have just slightly too large a bore for the 1mm shafts on the right angle Rory motors...what do people use aside from custom solutions?
Attachments
Some tiny, tiny motors and a Scorpion Mini for scale, yesterday
Some tiny, tiny motors and a Scorpion Mini for scale, yesterday
nanomotors.jpg (89.53 KiB) Viewed 10273 times
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
"These dreams go on when I close my eyes...every second of the night, I live another life"

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

Re: Nanoweight Parts

Post by Rapidrory »

My wheels were just roughly cut circles of polycarb drilled out to 0.9mm or there abouts, then pressed onto the shaft and glued there. You can then glue other wheels to the polycarb circle.. not the neatest, but works :L
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 »

Just bought a set of these http://www.ebay.co.uk/itm/5-Pcs-DC-3-7V ... 43cc918fb7
They're about the same price as the same price as the similar worm drive ones, but the problem that I've found with the double speed hacked worm drive motors is that when fighting ants, the force from being sat on by another and and getting pushed around can damage the worm drive, to the point where mini dozer 2 needs almost a total rebuild already... Hopefully these gearboxes are more forgiving to external forces. They're quite long at 25mm, so will need some work to fit them in a nano, but hopefully the larger motor means more torque.
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 »

Also, sub gram accurate scales for ~4 is a useful addition for anyone building Nanoweights: http://www.ebay.co.uk/itm/Jewelry-Elect ... 2755&rt=nc
Rory Mangles - Team Nuts

Robots: Nuts 2 and many more...

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

AntRoboteer
Posts: 440
Joined: Mon Mar 03, 2014 7:01 pm

Re: Nanoweight Parts

Post by AntRoboteer »

If somebody could answer these questions for me I would be very grateful as I want to get a nano going (mainly to cluster with one of my other robots):

1) Which chargers do people use for their NanoTech 60mAh batteries (http://www.hobbyking.com/hobbyking/stor ... duct=63088) and do they automatically start and stop or are you left to your own devices?

2) What is a mini molex connector? Is it the same as a JST 1.5mm connector?

3) Those servos look fiddly. I therefore want to use gear motors of some kind if possible. Servo boards are mentioned as the recommended motor drivers but which ones? Would SG50 boards do the job?

Thanks everybody!

User avatar
BeligerAnt
Posts: 1872
Joined: Wed May 15, 2002 12:00 am
Location: Brighton
Contact:

Re: Nanoweight Parts

Post by BeligerAnt »

"Mini Molex" is a rather vague description of a connector! Molex (http://www.molex.com) are a manufacturer of many, many different styles of connector several of which could be described as "mini".
JST (http://www.jst.co.uk) are another manufacturer of connectors, generally more consumer-focussed than Molex and popular with all sorts of model RC uses. Again, they make many different types of connector, possibly also several different "1.5mm" styles.
It is possible that there are equivalent Molex and JST parts, but you would have to do some research to figure it out.
Gary, Team BeligerAnt

AntRoboteer
Posts: 440
Joined: Mon Mar 03, 2014 7:01 pm

Re: Nanoweight Parts

Post by AntRoboteer »

Thanks for your reply! I'll examine that more closely.
It appears people don't know which chargers they are using for their own batteries then so I think I'll give those a miss as I can't find a suitable one.

Therefore, I was thinking of soldering a connector of some kind to something like this:
http://www.aliexpress.com/item/GP-batte ... 87294.html

Would they be of any use to power a nano?

Thanks for your help!

User avatar
BeligerAnt
Posts: 1872
Joined: Wed May 15, 2002 12:00 am
Location: Brighton
Contact:

Re: Nanoweight Parts

Post by BeligerAnt »

I can't imagine those NiMH battery packs working very well for a nano. Nano really does seem to be the one place where you *need* LiPos!

For the original LiPo batteries you posted, these adapters look like the right connector to adapt to the common JST connector which most LiPo chargers will accommodate.
http://www.hobbyking.com/hobbyking/stor ... rness.html
http://www.hobbyking.com/hobbyking/stor ... _2pc_.html
http://www.hobbyking.com/hobbyking/stor ... _bag_.html

The first one will work for a single cell (and up to 6 cells in parallel) but charging cells in parallel really can't be recommended.
The second one will work for charging 2 cells, but you really need a pair of cells that you treat equally. You could easily modify it to only connect a single cell.
The third one is only an extension lead but could be used as part of an adapter.
The first one is the best solution, but ignore 5 of the connectors and just use it as a 1-cell adapter.

If you have one of the many generic LiPo chargers such as
http://www.hobbyking.com/hobbyking/stor ... oduct=5548
then you can set it to a single LiPo cell and the minimum charging current and you will be OK.
The Nanotech 60mAh batteries can be charged at 2C rate (= 120mA), so the minimum charging rate of 0.1A (100mA) of the common LiPo chargers will be OK.
Gary, Team BeligerAnt

Post Reply