Replies to This Discussion

DeveloperPermalink Reply by Olivier ADLER on July 4, 2011 at 6:59am

 

To keep things simple and if you have a digital servo, then you can program it for reverse operation.

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Permalink Reply by mc_don on July 4, 2011 at 10:57am

can we set reverse servo from configurator AMP by change value of RC7_REV?

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Permalink Reply by Sean O'Connor on July 4, 2011 at 12:27pm

It's an anolog servo. Where about is the RC7_REV - I can't seem to find it?

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Permalink Reply by mc_don on July 4, 2011 at 1:32pm

you can find on configuration-> command

but i don't know the function.

mybe you can try :)

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Permalink Reply by Sean O'Connor on July 5, 2011 at 1:41am

I tried changing the value to/from: 1, 0, -1 -- there is no diffrnce between either of them. Maybe this function is disabled/not used in ACM2?

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Permalink Reply by mc_don on July 5, 2011 at 1:48am

this is Comment by hsucliff 9 hours ago

Answer to RJBK,

    I used to try to modify source code to reverse tri servo, but didn't get it work.

I decided to change servo mounting direction for quicker setup.

 

and i will try to reverse the servo by hardware? (swap potensio & motor cable) may be it will work :)

becouse to difficult if i change the servo mouting :(

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DeveloperPermalink Reply by Olivier ADLER on July 5, 2011 at 1:54am

 

servo hardware change seems like a quite hard task :=(

 

could be easier or safer to buy a digital servo...

 

 

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Permalink Reply by Sean O'Connor on July 5, 2011 at 2:03am

Ahhh! Just got it to work! You need to reverse the RC4 channel NOT the RC7 -- RC4 is the input for yaw on a tricopter. You reverse the channel by replacing 1 with -1 as per the APM manual. It would be nice if a revision of this page http://code.google.com/p/ardupilot-mega/wiki/Reversing was in the ACM manual.

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Permalink Reply by mc_don on July 5, 2011 at 4:27am

nice.. i'll try many thank's :)

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Permalink Reply by mc_don on July 5, 2011 at 4:56am

i have try to change CH4_rev to -1, the ruder can reverse.

but my 3Cs is still rotate yaw to left

I think, i must reverse the yaw gyro.

i use prop. CCW for left front and back. and CW for right front

any idea?

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Permalink Reply by Sean O'Connor on July 5, 2011 at 12:33pm

By reversing CH4 the apm reverses the stabilize yaw signal, if manual yaw is reversed just reverse it on your transmitter.

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ModeratorPermalink Reply by Don Cramer on August 17, 2011 at 9:30pm

Unless I am missing something, this is not the case. As of AC 2.0.39 (what im running now) CH4_REV only reverses the the radio input (the servo travel), it does not change the yaw single, that is still reverse. (at least it is on my tri).

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