Dx6 ccpm reversing?

[zip80]

I just built my first T-rex,and I don't know anything about setting up the radio.When I put my throttle stick forward to hi position all my servos go down instead of up.How do I reverse the travel of all three in ccpm mode?Also in travel adjustment mode all channels are negative except the rudder it's positive.I don't understand how to change them all to positive. They're all at 100% now but not all are positive.I have the manual but its hard to understand. Thank you for any help.

[Jermo]

This was more for the DX7 but should work with the DX76
Jermo

Whatver the math behind the "Decision tree", you can "prune" that tree quickly:

1) Plug servos in being sure you get the "center" one (regardless of whether it's in front or behind the shaft) in the correct channel for your radio... don't worry about "right v left" servos, just plug them into the other two CCPM channels.
No decisions here, and much of our tree gone.

2) Use individual servo reverse in any/all combinations until all servos move the swash UP OR DOWN when you move the throttle/collective (left for mode 2) stick. Do NOT worry about up v down, just that all three servos move in the SAME direction. This is the key to this whole process... don't sweat the correctness of pitch, have faith for the whole process, just get all 3 servos moving the same way.
Only 2^3 things to try here, and you can see which individual servo doesn't match the other two, so it's really quite a bit less than that.

3) Go to swash mix and set + or - as appropriate so that the swash now moves in the 'correct' up/down with relation to the stick.
Only 2^1 (two choices) here, and again, you can see it, so really only 1 choice, or 0.

Swash will now work... almost always. Check aileron. If aileron "reversed", reverse the physical plugs for the "right and left" servos and re-do step 2 and 3; it will work for sure now, both aileron and elevator.

So, we've cut down to a handful of yes/no decisions... and eliminated most of the possible combinatorial possibilities as we went through the steps. A really good setup guy showed me this years ago... works great.




Note: Switching individual servo reverses and swash mix from is exactly what Jermo did (according to his posts), so what's so great about my process? Most people will try to "combine" step 2 & 3, it's just the way humans think. Do them separately, in that order, with faith, and you'll be done in under 5 minutes.

[zip80]

Jermo, Thank you I understand exactly what you told me.I have all three servos moving in the same direction but reverse of the way I need them to move.What I can't figure out is how to reverse all three in ccpm mode.How do I physically change them on this radio?

[Jermo]

There are two settings to reverse travel. Servo direction and swash adjustments. The swash adjustments should be able to go negative and positive. If you follow the proceedure closely and don't skip steps you'll arrive with a corrected and working setup.
Jermo