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Throttle-Pitch-channel 7 clarification for dummies like me

Posted by Dennis on February 23, 2013 at 11:52am

I am as a last resort asking for help figuring this one out.

 

I have for weeks tried to sort this thing out by reading and experiminting but can't get it.

 

Outrage 550, apm2.0 firmware 2.9.1, Tx JR 9503-dragonlink 12 channel first rev. receiver.

 

My confusion comes in with the descriprion in the tradheli google code connection diagram. I think instead of connecting throttle on APM input channel 3 we really need to connect the pitch channel to input channel 3.

 

With this connection however, as soon as I try "save" in swash setup in MP, the swash moves to maximum pitch and stays here no matter what switch I switch,  or gimbal I move. The swash behaves normally while I'm in "manual" mode under swash setup but as soon as I "save".

 

I worked on this setup for weeks achieving pretty close balance with all shafts revolving straight < .001 T.I.R. so I really hate to get this wrong and bump any rotor against the ground.

 

Thanks in advance for any help you can give me.

Dennis

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Tags: setup, throttle, tradheli
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Replies

  • Rob_Lefebvre February 23, 2013 at 8:21pm

    I think I know what might be happening... You might have the collective going in the correct channel, but the signal might be reversed (up is down).

    Then, after pressing "save", you enter normal flight mode (instead of setup).  And you are disarmed.  Disarmed puts collective at full-down-collective, no matter what.  But your collective is reversed, so it goes up.

    I'm not sure who/how/when the disarmed=down collective thing snuck in to affect Helis.  I don't like it and have tried to find it and fix it, but no luck so far.

    I would try arming the system, and see if you get some control.

  • Developer
    Randy February 23, 2013 at 6:59pm

    There's sometimes some confusion in terminology between "collective pitch" and "pitch" and "throttle".

    pilot's "collective pitch" (i.e. up-down) control is equivalent to the multicopter "throttle" and that should go into APM's input channel 3.

    pilot's pitch (forward-back) control should go into APM's input channel 2.

    pilot's motor speed should go directly to the heli's motor ESC or into APM's input channel 8 (i think).

    BTW the collection of tradheli people seem to be over on these threads here and here.

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