MakeKit MD2 Dronekit, Manual

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The next thing to do is called the throttle range and is done to calibrate the controllers so
that they interpret the control signals from the control board in the same way. Here you
must be two people.
No propeller can be mounted at this stage.
Disconnect the battery on the drone.
Kalibrering av regulatorer
Start by turning on the remote control and set the throttle to max.
Person 1 holds down buttons 1 and 4 on the flight controller at the same
time and holds these until the procedure is completed. Person 2 then
connects the battery on the quadcopter. The screen should show
"
Throttle pass trough ". Wait about 4 seconds - a beep sounds.
As soon as this signal is complete, immediately lower the
throttles to zero. Wait for a new signal. You can now release
buttons 1 and 4. Restart the quadcopter by pulling out and
inserting the battery again (the radio transmitter is on all the
time).
Verify that all the motors spin up when arming. Propeller should still be off! Gently
accelerate with the throttle. At a certain point, all the motors should start spinning
almost as fast. It is an advantage that the quadcopter stands horizontally on this test.
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