Hello Everyone,

I have been working on a tricopter for a few weeks now, and now when everything is completed I have run into a problem.
No matter what i do, the yaw servo is not responding at all. Am posting the pics of my setup here, please someone temme what's wrong.

regards
Bilal

Have you made sure that you have selected the correct model (motor layout) ?

i dunno what exactly the problem is, receiver  test is fine, receiver slides look fine too, ive varified the connections and motor layout hundreds of tie now, but still the problem persists.

kindly check the pics

 

yes sir, ive uploaded the tricopter motor layout,.... infact many times now and even verified the direstion of rotation of all the three motors

Have you checked whether the servo is actually working ?
and are you able to arm the kk and are all other controls working as intended ?

yes the servo is working perfectly when i connect it with the receiver independently, KK board is arming when i give right rudder, all the motors start moving at about 10% throttle, in the correct direction as well

what esc are you using? is it a 4 in 1 esc?
You seems to be using individual female headers for the servo pin as extenders, are you sure the pin connection is correct like signal/+/- polarity.

ON the side note, there should be some menu in KK to see which channel for what, go to that and confirm if your 4th channel is assigned to servo.
(dumped Kk long time ago and moved to cc3d, happy since then, though others are pretty happy with KK as well, cant remember the troubleshooting steps for this, otherwise, i were a pro in tricopter with KK)

Can you please explain your complete circuit with mixer editor options, specially with photos.

Ashok.P

please post a pic of your  " mixer editer " menu .
Check whether M4 o/p is assigned to drive a servo

If the ESC come with SBEC, remove the 5v RED wire from any two ESCs. Apparently, they don't go well in parallel.

Does the servo move while arming?
Is the rudder moving in receiver test screen at all?

Long time since I worked with kk2 and if my memory serves me correctly ,the servo wont move if your copter is unarmed,neither should it move at zero throttle even when its armed. You probably have to arm first(without props), then give a lil bit throttle and try to yaw, which should move the servo but it wont probably return back as your copter is stationary on ground in stabilize mode, but works well in flight.

And you have to power the servo separately as the M1 pin on kk only powers the board so anything connected from M2-M8 needs to be powered separately, so atleast 1 bec/ubec needs to be connected from M2-M8 with power in case of a tricopter.

Another thing to check would be mixer setting for rudder(servo). Check what Sooraj has mentioned earlier, then depending on the servo used, 'rate' should be set high for digital servos and low for analog servos. You can also cut/paste(manually) these settings to another output pin such as M5-M8 and verify if M4 is the culprit as a last resort.

Ah, sidewinder you have covered pretty much every point possible. OP, do go thru above steps, it should be fine

Quote from: SideWinder on March 23, 2015, 10:03:40 AM

And you have to power the servo separately as the M1 pin on kk only powers the board so anything connected from M2-M8 needs to be powered separately, so atleast 1 bec/ubec needs to be connected from M2-M8 with power in case of a tricopter.

This might be the most probable cause for this error

Sooraj in the pics Bilal posted, its looks like he has connected M2&3 hopefully with non opto esc leads or esc's with bec and expect they are working properly as intended. I just mentioned the point for the uninitiated.

I think Bilal has overcome the problem. It was in the mixer editor settings. "Type: ESC to servo"

Check ur Mixer Editor and set the Ch4. / Aux. to Servo ...... If that aint working ....... try upgrading your Firmware version . 

Yes its working with that now. I told him that few days back and I hope its fine.
May be now he is facing some other problem with the LCD not displaying anything