Tagged: Quadcoptor problems
February 10, 2015 at 1:33 PM #2525
- (Warning!) All initial setup procedures are to be done with the Propellers Removed.
- Insure that the KK controller board is installed in the Quadcopter airframe such that the Roll Axis and arrow next to it on the control board point between the 2 red booms (The front of the copter).
- Install a 3 cell 1200 – 5200 mah LiPo battery under the copter with a Velcro battery strap.
- Connect your receiver to the 2 connectors from the cables from the KK control board:
- Connect the 3 wire to 3 wire connector cable to channel 1 such that the signal (white) wire is on the signal side of your receiver.
- Connect the 3 – 1 wire to 3 wire connector cable to your receiver sideways across channels 2 – 3 – 4 on the signal side of your receiver with white wire on channel 2.
- Install your receiver and antenna under the copter next to the battery with adhesive backed Velcro tape. (Underneath is better as it provides better line of sight to the antenna).
- If not already done, solder a compatible connector on the controller boards battery leads.
- Program your transmitter for the Quadcopter: Conventional airplane, 1 aileron and 1 engine.
- Set initial transmitter rates to: Aileron = 50% (roll), Elevator = 50% (pitch), Rudder = 100% (yaw).
- Reverse controls as follows: Hitec – Elevator, Futaba – Throttle, JR/Spektrum – All but Throttle.
- Set the KK controller boards roll, pitch and yaw potentiometers to their mid position.
- Set the Quadcopter on a table so that the front (the two red spars) face away from you.
- Turn on the transmitter. Ensure the throttle is off. Connect the battery on the Quadcopter.
- The controller is armed by putting the throttle all the way down and moving the same stick all the way to the right. The Blue LED on the controller board should come on and stay on. The controller is now armed and will function. (To fly you always need to Arm the Controller).
- If controller doesn’t arm (blue LED on), trim the throttle a down a bit (-7 on mine) and try again.
- The controller can also be unarmed by putting the throttle stick all the way down and moving it to the left for a few seconds (Blue LED goes off). (With propellers installed you will want to do this.)
- Once the blue LED is on, advance the throttle until the motors start to turn.
- The directions of the motors MUST be as follows: Front left = clockwise, Front right = counter clockwise, Rear right = clockwise and Rear left = counter clockwise.
- Note any motors turning the wrong direction and unarm and disconnect the battery.
- On those motors that were turning the wrong direction reverse any two motor power lead connections to reverse motor direction. It is normal for some to initially be turning incorrectly.
- First time use requires calibration of the ESCs: (Warning! Propellers Must Be Removed!)
- With battery disconnected (and Propellers off) set the controllers Yaw pot position to zero.
- Turn on your transmitter and move the throttle position to full on.
- Plug in Quadcopter battery. A few seconds after initial beeps wait for ESCs to beep twice.
- Quickly move throttle stick to full off position. The ESCs should beep again.
- Disconnect the battery from the flight controller. Restore Yaw potentiometer position to half.
- Force the KK flight control board to record the center stick position of your transmitter.
- Set flight controller pitch gain pot to zero. Turn on transmitter without touching sticks.
- Connect battery to flight controller. LED flashes 3 times than once. (Sticks are zeroed.)
- Disconnect battery. Restore pitch gain potentiometer to previous position or midway.
- Fix any incorrect roll, pitch, yaw directions: (Transmitter presets listed above should be OK.)
- Turn on transmitter, connect battery, arm controller. Set throttle stick to motors just running.
- Move elevator stick forward (front motors should slow, back motors speed up). Move stick back = front faster, back slower. (If not, reverse elevator from current setting at transmitter)
- Push aileron stick left (left motors should slow, right motors speed up). Move stick right = left faster, right slower. (If not, reverse aileron from current setting at transmitter)
- Push rudder stick left (front left and back right motors should speed up and the front right and back left ones should slow down). Move stick right = front right and left back = faster and front left and back right = slower. (If not, reverse rudder from current setting at transmitter)
- Check Gyro direction sense (with propellers off):
- Turn on transmitter, connect battery, arm controller and set to motors to just running.
- Tilt quad copter forward. Forward motors should speed up. If not reverse pitch gyro as below.
- Tilt quad copter to the left. Left motors should speed up. If not reverse roll gyro as below.
- Turn quad copter clockwise. Front left and back right motors should speed up. If not reverse yaw gyro as below.
- Reversing a gyro direction sense. (After reversing below redo gyro direction test above to verify)
- Disconnect battery from flight controller. Set roll gain pot to zero. DOESNT WORK ON MINE
- Turn on transmitter and connect battery to flight controller (LED flashes rapidly 10 times)
- Move the stick (direction) for the gyro you want to reverse. LED blinks continuously.
- Turn off the flight controller. Repeat above for each axis that needs its gyro reversed.
- When finished, disconnect battery and restore roll gain potentiometer to midway on.
- Install and tighten propellers: Left front and right back = clockwise. Right front and left back = counter clockwise rotation. (Ensure top and bottom #6 bushings are seated in all propellers.) With printing on top propellers should thrust in downward direction in rotations indicated.
- Initial flight: Start with roll, pitch and yaw gyro potentiometer gains set at about 50% or midway.
- Place the Quadcopter in the center of a large flat open space free of children, small animals and other obstacles and facing directly away from you.
- Turn on the transmitter, plug in the battery and arm the controller.
- Slowly advance throttle (Gyros calibrate from throttle zero) until the motors are just spinning.
- Move the elevator (pitch), aileron (roll) and rudder (yaw) sticks you should see appropriate speedup and slowdown of propellers as described in item 22 above.
- Advance throttle until copter is not quite hovering. Move elevator and aileron stick as above which will tilt copter in specified direction. Stick forward = tilt forward. Stick right = tilt right.
- Also try rudder (yaw) stick. Copter should try to rotate left when rudder stick is held left.
- If above has performed satisfactorily attempt to increase throttle till a low hover is achieved. If operation becomes erratic, reduce or kill the throttle. A loose Quadcopter is dangerous.
- If copter reacts inappropriately and you cannot achieve a hover, it is possible a gyro direction sense is still not set correctly. Its behaviour should indicate offending control.
- Once you achieve a hover, make slow controlled movements at low altitude to familiarize yourself with the response. Orientation is tricky; remember the red motor booms are in front.
- You preset Yaw, pitch and roll gyro pots to 50% which is OK for initial flights but as you gain experience you may want to adjust gyro gains. Mine are set about 75% (sideways) on all axes.
- Increase gain of one pot slowly in increments until it starts to oscillate when you try to hover then reduce the gain at least one increment. Repeat for each axis. Do not reduce below 40%.
- Reducing gain permits faster horizontal flight but makes control more difficult, decreases stability and increases “tipiness”. Too much gain produces oscillations.
- Do not fly the Quadcopter over or close to anything that bleeds or is expensive. When a Quadcopter fails it falls like a stone or, if you fail to kill the throttle, it is likely to try and run you down and chop you into little bits. Maintaining orientation is tricky. Keep it low and close to start.
- Proceed cautiously, conservatively and safely. You should have a great Quad flying experience.
- The suspension can tolerate sudden descents from 2 feet or so. As you gain experience, adjust gyro gains and transmitter rates and -expo as desired for increased performance or stability.
- 100% transmitter rates on roll or pitch (with lots of altitude) can even permit loops or rolls.
May 19, 2015 at 8:00 AM #2935
- I have a 1800 Mah Super Tigre battery, Hitec Optima 7 receiver and a Hitec Aurora 9 transmitter with the elevator reversed and -7 throttle trim.
Maybe you can help. I just built a x525 and one of the ESC controller keeps beeping. I’m new at this and don’t know what to do.May 19, 2015 at 10:03 AM #2936
could you please upload video ?
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