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3d - Printworx

Printing 3d Forum

Building hexcopter

Started by sausageroll, Monday,September 10, 2012, 17:48:50

Previous topic - Next topic

sausageroll

So my quad copter is doing well, but I always thought a hex would be nice. A friend of mine wants to build one like mine and I thought we may as well make hex copters whilst we are at it, so im gonna build him a new one and im gonna upgrade mine to a hex with the naza.

The question is, does anyone here also want one? If im gonna laser cut a few hex copter chassis, i may as well do some extra. I could do you all the laser cut parts for a large hex (12inch rotors) for about 90 quid.

Any takers?

Gaza07

Look forward to seeing your hex Im afraid I wont be wanting one cash flow is a bit low and its all the other gear to with it to  ;)
Nice offer though  :bravo:

icedfusion

Is that laser cut wood? or is it from some other material?

ice.

sausageroll


Gaza07

Tuesday,September 11, 2012, 12:20:34 #4 Last Edit: Tuesday,September 11, 2012, 12:36:32 by Gaza07
Is there a reason you use Ali instead of glass fibre sheet or carbon fibre, just wondering thats all  ;)

sausageroll

Yeah, ali is MUCH better at building quads. Im amazed more people dont use it. Laser cutting is fast and cheap. Its a pain to laser cut caron or glass fibre, needs to be waterjet cut really which is expensive. At 1.5mm thick sheets, the frame is very rigid, and in a crash, rather than just breaking like glass fibre would, it bends and you just bend it back.

It weighs practically nothing, its very light.

Gaza07

I didnt realise you had to use water with the other materials, so what price could you produce basic quad centre plates for around 120mm square with a cross running from corner to corner, a bit like the one below  ~~

[attach=1]

sausageroll

In quantities of 20+ or so, probably about a fiver each.

Gaza07

That's quite a good price but they are only 14 euros a pair the ones in the picture and do have the built in power distribution  ~~

sausageroll

Thats caus they are making them in their thousands in china. You cant buy what im making, so the only option is to make it yourself, and a fiver each isnt bad when you consider its built to your own design. Mine has loads of slots on it for all the gear I have, all custom done and in the right places, its really neat. Dont get that with a ready built one.

Gaza07

I realise that and wasn't trying to criticise, and also realise it is a very good offer  ~~
Sorry if I offended I didn't mean to  :embarrassed

sausageroll

nope lol, didnt mean to give that impression.

Gaza07

OK no worries then just me being to sensitive I will give my self a slap  :rolleyes:

teslahed

Tuesday,September 11, 2012, 13:36:11 #13 Last Edit: Tuesday,September 11, 2012, 13:38:32 by teslahed
Quote from: sausageroll on Tuesday,September 11, 2012, 12:55:29
Thats caus they are making them in their thousands in china. You cant buy what im making, so the only option is to make it yourself, and a fiver each isnt bad when you consider its built to your own design. Mine has loads of slots on it for all the gear I have, all custom done and in the right places, its really neat. Dont get that with a ready built one.


I'm just putting the finishing touches to a new quadcopter and probably wont be building another one for a little while, but this is a very good offer. I'll be very interested to see what you come up with and in the long run the possibility of designing my own aluminium frame for laser cutting seems well worth looking in to as well.

It's possible that if you come up with some details you'd get a few people interested - if the frame would fit together with 10mm square aluminium or carbon fibre tubing then it could be very useful for a lot of people.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

sausageroll

I'm using 20mm, at 1300mm wide, it's too big for 10 hah

teslahed

Smaller quadcopters based around 10mm square aluminium tubing are very popular and also quite cheap to put together - so if you did a run of smaller plates for quads based on this size you'd get far more interest than with a larger hexacopter design - although you'd produce more to sell from a given amount of aluminium too.

I would be very interested if you ever did think of doing a run of smaller frames but i wouldn't be able to afford a larger one (or the bits to go in it) any time soon.

If you ever did think of doing this I'd love to help out messing with the design of the basic frame - that's not something I've been able to do before.
One circlip short of a quadcopter.
 1 lobe short of an antenna.

sausageroll

I like the idea of doing a big one caus there arnt many really big ones out there....



Heres the chassis design as it stands.


Pete.

icedfusion

I am with tesla on this one, I would definitely buy some if they were made for 10mm arms. All my equipment is geared for the 450 sized quads. I may make a larger one in the future, it just means it costs more to fix when it falls out of the sky.

ice.

sausageroll

I can make one, its just not where my personal interests lie. This is a 1000 sized hex.


Pete.

icedfusion

Are you using a naza on it?

For other flight controllers, it could be interesting to design in, what some people call 'clean plates'. This is basically a plate section that is mounted on some grommets where the FC would sit - bit like the ones I linked to on teslas thread about damping.

However, with the size and weight of that frame, I bet it resists vibrations very well.

Where do you get your arms from with the dimensions you require?

ice.

sausageroll

I get 20x20 pultruded carbon rod from easycomposites, then wrap it in tape and cut with a fine tooth hack saw. The tape stops individual fibres from teasing out.

Only thing is, teh caron is far too strong. The legs and arms really need to be the weak point, like a crumple zone. In the first crash I had, the whole frame was destroyed because the carbon transferred all of the force onto the frame and it bent beyond repair. Im currently using wood from B and Q, which is heavier than carbon, but I can cut little V shapes into it with the band saw to weaken it, so in a crash it just breaks and projects the chassis. Its a 5min job to replace a 50p bit of wood, the carbon, whilst about 100g lighter than the wood is just too strong. Once im happy its reliable and wont crash again, i might change it back for carbon to save that bit of weight, but when the frame weighs that much as it is, with 1.5kg of battery on board, 100g wont make a lot of difference. Carbon does look a lot cooler though, wood wrapped in leccy tape looks crap!


sausageroll


Gaza07

That looks very good cant wait to see the real thing  :bravo:

pheasant_plucker

QuoteOnly thing is, teh caron is far too strong. The legs and arms really need to be the weak point, like a crumple zone. In the first crash I had, the whole frame was destroyed because the carbon transferred all of the force onto the frame and it bent beyond repair


Drill some small weakening holes near the root of the arms so that is where they will break. Nothing too big something like 6mm dia on each side.

Gerry
The man serving me in the canteen said "Look, You can see the face of Jesus in the Margarine" The Asian guy next to me replied "I can't believe it's not Budda"
http://www.namfc.co.uk/pictures/fly.gif

sausageroll

I've been busy today. My poor little surface mount antex does not like pumping all that heat into these enormous cables.

http://a4.sphotos.ak.fbcdn.net/hphotos-ak-prn1/616036_10151154142367570_903926443_o.jpg

sausageroll


Gaza07



sausageroll


Gaza07

Fair bit of work there nice and tidy to  :bravo: