QRM - DIY Mini Quadcopter update 2

Door xp7amrkr op zaterdag 28 januari 2012 15:02 - Reacties (18)
Categorie: -, Views: 8.679

This week all necessary parts for the QRM quadcopter arrived, and we test fitted them on the aluminum prototype frame. Everything fitted perfect, and we finalized the designs so that the frame could be machined out of carbon fiber.

Together with the parts ordered at Hobbyking we bought a couple of 100x300mm 1.5mm thick sheets of carbon fiber. We managed to nest all the parts on two of these sheets, reducing the waist material to a minimum. When machining carbon fiber the material that is chipped away are minuscule fibers that you really don't want to inhale. (not often anyway) The parts could be machined using a vacuum cleaner, but we chose to make a bath in which we can machine the carbon fiber under water. This was done purely as a dust collecting mechanism, and not as coolant.



As you can see above we tabbed the parts so that they wouldn't come lose while machining. Both sheets where machined on our home build CNC machine, with a 2mm spiral toothed solid carbide endmill, with a full-depth cut. Machining took about twenty minutes per sheet, and we recorded the whole process. The water got black almost instant, so the machining itself isn't viable. We fast-forwarded the movie, and cut out some parts. You can see the sheets being taken out of the bath at 1:40 and 3:00.

After machining the parts, we started assembly. The video below is fast-forwarded, the real time was about one hour. The only thing left to do is to connect all the electronics, set up the control board and see if she flies!

The total ready to fly weight will be around 250 grams!




Larger images are available on:
Gallary Dennis Martens - QRM quadcopter

QRM - DIY Mini Quadcopter

Door xp7amrkr op woensdag 4 januari 2012 16:19 - Reacties (16)
Categorie: Hobby, Views: 6.799

Last year me and a friend of mine started building a quadcopter from scratch. We wanted to build the machine and the electronics ourselves. We experimentad a lot, but up until today we did not yet succeed in getting the bird in the air with the home build electronics. We keep having some trouble reading the data of one of the sensors, thus the PID loop doesn’t work properly. More information about out QR1 quadcopter can be found on QR1 quadcopter

We recently bought the Hobbyking control board for quadcopters, and mounted this on the QR1 frame. It flew good, and we both wanted a proper quadcopter for flying purposes only. We recon the Hobbyking control board with other KK microcopter firmware will do the job perfect. We wanted the quadcopter to be small, and started designing a mini quadcopter.

We used the same parts lots of other folks use in there quad, listed below:
Motor: 18-11 2000kv Micro Brushless Outrunner (10g)
ESC: H-KING 10A Fixed Wing Brushless Speed Controller
Props: 5x3 Propellers (Standard and Counter Rotating) (6pc)
Prop adaptors: Prop adapter w/ Alu Cone M5x2mm shaft (Grub Screw Type)
Battery: Turnigy nano-tech 850mah 2S 25~40C Lipo Pack
Control board: HobbyKing Quadcopter Control Board V2.1 (Atmega168PA)

We ordered all the parts for an amazing 110 euro’s, you almost get it for free.

After deciding which parts to use, we started designing the little monster. We came up with a design that we could machine out of 1,5mm aluminium, for prototyping purposes. We plan on making the final design out of carbon fiber. The quadcopter is only 176x176mm and will have a RTF flying weight of about 325grams. We gave it the name QRM, meaning Quad Rotor Mini.

Below are some images of the prototype machined out of 1,5mm aluminium. The LiPo battery in the pictures is a 3S 800mAh battery, and will be replaced for a 2S 850mAh equivalent.


And a Youtube video!

Larger images are available on:
Gallary Dennis Martens - QRM quadcopter

Are there people intrested in another update of this project, or can we only talk geek around here?