I have been working on this model for almost two months. The idea was to create a mid/heavy-lift 3D printed folding/detachable quadcopter. this is the first prototype that I have printed out.

Hope you guys helps me to improve the design. There is a lot of things to do before it's done. For example battery holder, in different alternative positions, under, top, sides, it depends on what kind of load do you have: fixed camera, sensors, stab gimbal etc.

In order to provide a good system to wrap load/battery modules I'm testing Rotite joints. I know it's has Intellectual Property restrictions... but is such a nice way to keep thing fixed when you have a 3D printer.http://www.rotite.com/ 
Even it could be a good system for detachable arms, like this one which is no-plane.

Specs:
- 3536-11 motors from RCTimer: 102gr
- 30A ESCs simonK
- APM2.5
- 3DR radio 433Mhz
- Turnigy 9x Radio
- poor man but very effective FC vibration isolated system
- GPS CRIUS board V2.0 with u-blox CN06

Weights:
- Full quad without battery: 1.3 Kg.
- Weight single arm, with cables but without motor: 95 gr
- Weight single arm, fully assembled: 197 gr.
- Main body box without electronics: 173gr
- Dampening plate: 53gr


Dampening system is quite simple, but I didn't toke pictures, I will upload a Solidworks render soon.

Assembling: I toke the easy way, I use a home made ABS solution in acetone 100% pure. This solution is pretty hard and I got a solid union. 3D Printer use thermal plastic fusion between layers, so this is a chemical union, even harder. I'm still waiting for brass fastener and screw M3 to improve this assembly. 

For more info here is the FB page https://www.facebook.com/Argfly
Please I would like to hear critics, helps me a lot.

ESC are in the basement, on top the FC dampening plate suspended with 10 mm padding on the 3-axis by elastic bands.




Views: 15813

Comment by Sam on April 28, 2013 at 6:19pm

Thanks for the fast reply!

What 3D printer do you use?

And once again nice work! Its looks futuristic!

Comment by Alejandro Martin Pirola on April 28, 2013 at 8:47pm

Thanks Gary! I didn't saw your comment. Yeah total weight is too much. Main body has 4mm walls that can be done more thin. A new plugin system using a conical rotite joint can explode 3D printers capabilities for print honeycomb shaped solid bodies. 
The problem here is the way that arm holder glues to the body, plain, so I need big solid walls. But if I use conical rotite like joints, the arm holder contact surface goes trough the whole main body wall. So the main body instead of being 4mm solid plastic it can be filled with a honeycomb pattern like. 

Sam, I'm using a Makerbot Replicator Chinese clone from Flashforge http://www.ff3dp.com/

Comment by Sebastian Pometti on April 28, 2013 at 9:00pm

Excelente trabajo Alejandro, te felicito por tu iniciativa, realmente innovadora y sin lugar a dudas con mucho potencial a futuro, prueba y error hasta lograr la perfeccion. Saludos desde Bariloche! Seba

Comment by Alejandro Martin Pirola on April 28, 2013 at 10:28pm

Gracias Sebastian! Que envidia Bariloche, yo naci y creci en Gral. Roca RN.
Thank you Sebastian! What an envy Bariloche, I was born and raised in Gral Roca RN.

Comment by W. Joe Taylor on April 29, 2013 at 12:00am
Alejandro,
I really like the design, especially the arms, which would tend to not restrict lifting thrust as much as wider arms, like so many of the designs out there. When you get the honeycomb, lighter version, please post again, so we can order it. Which carbon fiber props are those?
Joe
Comment by LTMNO on April 29, 2013 at 6:30am

Awesome work! It what I would do if I had a 3d Printer!  I would be interested in knowing what you think you would either share the design for or cost of purchasing one.  

Great work!

Comment by Charles lakins on April 29, 2013 at 10:20am

Its very good indeed

The one thing I would have done differently is made the esc lead pins so the energized connections are female and the male ones placed on the arms, where no power is supplied when detached

Comment by Alejandro Martin Pirola on April 29, 2013 at 10:31am

Thanks Joe. Carbon fiber props 13x6.5 from Rctimer. I will keep you updated.
LTMNO I will share it soon. The main idea is to release it under Open Hardware license. 
Charles absolutely true. The correct way is that power source has (contact protected) female connectors. Something to improve in the next version.

Comment by Alejandro Martin Pirola on April 29, 2013 at 10:40am

I did tested in fly this morning. Bad news is that vibration isolation plate actually absorb high freq vibration but amplify low freq oscillations, making the model jump randomly. The good news was that two peaces of foam gives the right strength to not amplify low freq oscillations. Now it fly pretty stable.
I will upload the video may 1st.

Comment by Charles lakins on April 29, 2013 at 11:23am

nice good work! I still like it anyway :D

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