HK Quad Board V2.1

Hi folks,

I am new to the world of quadracopters and after reading about them for a while I decided to invest in one.

I ordered the parts based on a list someone else had written and if something was out of stock (plush 20A ESC) i ordered something similar.

I have finally wired everything up and have all connections soldered, but I have now hit another snag: I cannot get the thing to arm.

I have tried flashing the firmware, the flash tool gives a message about not being able to set the sck period but completes ok, then the LED on the board lights and flashes rapidly until disconnected. I have connected everything up, TX turned on, end points at 100%, trim at 0% and throttle to 0 but the board does not initialise.

Following the advice of someone else on this forum, I have removed all but 1 BEC connection and the board flashes once when I connect power, then does nothing and does not respond to any input from the TX (including down/up+left/right on either sticks.

I have tried disconnecting the servo extensions 1 by 1 and have found that with all but rudder connected I am now getting a beep from the ESCs. After this beep, the board does not appear to react to any inputs.

Anyone have any ideas, tips or advice? I'm starting to see wiring looms and servo extension leads in my sleep...   

Try moving throttle stick left or right at lowest setting. While holding it there adjust your trim the same way and watch the LED on board...

Originally posted by DannyJigg I disconnected power, reset yaw pot to ~50% and powered up again. A quick flash of the board's led and then the power on beep from the ESCs told me things were going better. A little input from the throttle stick and the motors jumped into life.

I assume you initialized the controller board before the motors started?

While in calibration mode, all ESC's receives the same signal. If all motors starts to spin when throttle is moved forward (while still in calibration mode), the direction of the throttle is correct. If endpoint is set to max and trim is all the way down to the low side, there is only the rudder/yaw channel left to worry about. Do you have a servo that you can connect to the rudder output on the receiver for testing endpoints?
Carefully inspect the wires between Rx and Quad board for the yaw channel.
The stick needs to be held in the initialization position for 2-3 seconds before the board will initialize.

If you get it to work, note that the motor sequence for KK 4.7-X is:
1 3
2 4

Fred