Monday, 24 February 2014

Full Function Tests

Spontaneous Projects is a chronicle of all of my projects, a reference for me, and a way to prevent others from making the same mistakes. 

 Using the same setup as yesterday, I've changed the motor layout to Tricopter - three motors, and the servo on channel 4.

I also removed the rubber tubing to increase the strength of the joints. A few more crashes, and took the drill out to fix it up after each crash. I've now reinforced the joints with more cable ties.

Servo - Rudder control

I've increased the functionality, adding a servo to the rear motor, using an adapted method based off this one. I used the same steering mounts he recommends, but have a DS-339MG servo. I used a small piece of 5mm dowel I had lying around, and the screws from the servo. I had to place a spacer under the hinge, and found that the perfect fit was using a piece of an old sim card - but any plastic card will work.

Full Servo set up
Credit card plastic was the perfect thickness













The wiring on Tricopter is

1            2
   \        / 
      |   |
        |
        |
        3          with servo on 4. 



KK2.1 wiring, outputs on left, 1 at top



The test flights with this setup went ok: The servo popping out is now a weak point in a crash, and one of the prop nuts came loose - only indication was that one corner just would not lift properly. Testing was cut short due to low battery - looks like it runs for 20 minutes or more.


Channel Set-up
While it was charging I've modified the Rx - Flight board cabling to get my main controls (strafe) on one stick, and the ones that will mostly be set and forget on the other. 

New setup 

Left side 
Switch       - doesn't seem to transmit - kills Throttle
Dial           - Aux turn clockwise to turn on self leveling
Vertical      - Fore aft
Horizontal  - left right strafe

Right Side
Switch       - shrinks range of everything except throttle - more precision
Dial           - no purpose
Vertical     - Throttle
Horizontal  - Rudder, should be able to be trimmed and left alone ideally. 




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