tirsdag den 31. december 2013

Hobbyking X650F Glass Fiber Quadcopter Frame

The zip tie around the frame was initially placed to hold the gimbal frame in place when i glued it together.






Hobbyking X650F Glass Fiber Quadcopter Frame 550mm, a great frame if you want to hide your cabling, I am a newbie at this stuff, but with this frame I was able to solder an extension cable on my ESC and feed them through the tube together with the LED all the wiring was then done under the frame of the X650F and the cables are visable as it is covered by the battery.

An idea i used was to take an old useless power supply from a PC and use the cables to extent the ESC, LED's and the yellow cables i used as signal wires from the MULTIWII pro down through the tube to the ESC.


I ran out of shrink tube so i had to use duct tape for some of the cabling, i ordered a box of assorted shrink tube from ebay, so patiently awaiting the package so i can redo the wiring. 
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Mounted a gimbal, the left most wires but have to be redone as i plan on powering the gimbal on a separate battery to avoid brown-out, the first time i mounted the gimbal and connected it to the flight controller it caused the flight controller to lose power and restart due to the gimbal pulling to much power.




Three levels under the hood the bottom is the power distribution, you have to find a piece if plastic/plywood drill four holes equivelent to the holes in the power board. The plasticplywood has to then be mounted under the frame so you can tie the board down. I put M3 plastic screws through the bottom mounting the holding brackets, mounted the flight controller then tightened it down with plastic screws.



The plywood mounted at the bottom of the frame, so i was able to mount power distribution board on the first level, without this there would be no space for it.







Used some foam to tie down the GPS, bluetooth and the Rx/Tx glued the foam on to the frame, then put some glue on some of the chips and glued that to the foam, i am not an electrician and don´t really know about these kind of things but i avoided glueing the whole printboard, i was a bit worried that it could end up shorting the GPS, so for me glueing a few of the chips was enough to hold it in place.


The LED mounted around the frame, it actulally closes the gap so the wires under the frame are not visable, got the front and back with LEDs for directional purposes with red and blue LED from HK



The original product was a 12 dollar gimbal off HK, http://www.hobbyking.com/hobbyking/store/uh_viewItem.aspidProduct=36495, was a pain putting together the mounting holes were small and didn´t fit their counter parts, so had to pry the holes with a screwdriver.


Was a nuisance to put together, the mounting holes were small so they had to be remade using a screwdriver and pryed the holes a bit larger, then had to use a dab of superglue to make the whole thing stay stabil. After a while had to get rid of the top section of the camera holder as it restricted movement on the roll axis, the original gimbal could not pitch very much so i decided to reconstruct the gimbal, brought a park servo and mounted and glued it with the top section, used a set of pliers to cut a bit of the back section off, this could have been avoided if i had mounted the gimbal further back as there is a lot of space by the mount point, i further revised it (not shown in the picture) by stabilisig the back with a round gimbal mount. It is glued to the gimbal frame and the mount bracket is on the back section acting as a bearing.Look further done for more pictures of the bearing.

A generel weak spot on the Hobbyking X650F is the motor mount nut top right hand corner, it tends to give way, when the quad crashes thus eating its way into the carbon fiber, this is probably a good thing in some sense, if it didn´t give way, then could probably crack the frame, will try to place a washer between the frame and nut so at least it doesn´t wear out the carbon fiber. (tells you what a shitty pilot i am).

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I cut the signal wire and mounted an extenseion through the tube, since i had shorted my ESC so they don´t supply power that i could use to power the MultiiWii pro board, i instead used a UBEC for that bit, the blue and the black cabel is the LED that i also extended and fed through the tube.


The ESC are fed through the holes at the bottom of the motor mount, then connected to the motor.


All the cables are then pushed into the space and zip tied together with the ESC at the bottom giving you a nice finish.


Mounting the Gimbal was done by using some foam glued to the X650F frame drilled two extra holes on the Gimbal frame and fed two Zip ties on either side, tightened them just enough so that i can remove it when not needing to use the Gimbal, so kind of slides on and off, it does tend to fall off during crashes but i will think of someway to take care of that.

As i mentioned earlier i used the round gimbal mount to act as a bearing on the back section of the Gimbal, this helps when carrying a camera and stabilizes the back gimbal in a neutral position. Have not yet tested its performance, but will probably be useless, but what the heck, it´s fun to make.