15 replies to this topic

[Mat Wellington]

Starting a thread here on how to set up and tune custom mixes, feel free to post up if theres any ammendments or any stuff you guys want covered, once done will port to the wiki.

The guide below will get fleshed out over the next week or so (have a shutdown at work, 12 hr days for 2 weeks - yay so will see how time allows )

The Guide

First things First - how to access the Custom mixes ?

Very simple, my young apprentice.
Load up the GCS software, select the "configuration" tab on the bottom, then the "Aircraft" tab on the left, and finally select "custom" from the "aircraft type" drop down box
 CC_Mixer_Access.jpg   117.47K   480 downloads
You can do all of this with no Copter Control board connected to the PC

Now , heres a tip, if you want to see how the standard mixes work (you will need a CC board connected for this) , select the Air Frame you want to see, click "save" to upload it to the CC board, then click on the "air frame" drop-down box and select custom - you will now see the mix settings for the airframe you just uploaded !

[ridgebackred]

Curve 1 in the Custom Mixer Settings tab is obviously the Throttle Curve.
Is Curve 2 another throttle curve? Is it mode dependent?


About the Throttle Curve itself:
If I reduce the 100% throttle setting in the Throttle Curve to make the stick response more granular, it does not limit the power range available to the control loop, correct?

Edited by ridgebackred, 06 September 2011 - 05:53 PM.

[Mat Wellington]

Curve 1 and Curve 2 are both throttle curves, not mode dependant, you may have a need to have a diferent curve for some motors/props, depending on........not sure but its there

Yup, set the curve to 90% max throttle, that leaves 10% throttle (about 19% total power) for the control system to use for corrections

[Ivan]

19%? hmm, thats kinda a lot, i might tri raising it to 95%

[juz]

Yeah, Ivan, I think I might do the same, 95% sounds good. I never use full throttle/power anyway!

[osnwt]

Mat Wellington, on 08 September 2011 - 12:35 AM, said:

Curve 1 and Curve 2 are both throttle curves, not mode dependant, you may have a need to have a diferent curve for some motors/props, depending on........not sure but its there

I'd say, the Curve 2 is mode-dependant. Each mixer has 5 inputs: Roll, Pitch, Yaw, Throttle through Curve 1, and ANY channel through Curve2. You can set Curve2 source to any control or accessory channels, and have this 5th channel in the mix. This is used for helicopters as a collective pitch control, where 3 CCPM servos all should have some input from the separate Tx Collective channel. But for the 2-motor plane this curve can be used as the 2nd throttle curve.

So it is mode-dependant.

And both curves should be renamed in the objects from ThrottleCurveN to just CurveN,

[AlPackin]

I'm curious about a spider hexa frame like David's http://forums.openpi...x-by-blueskyrc/  and Holco's spider

The closest frame type in the GCS in the Hexacopter X.  Do you think a custom mixer setting would be beneficial for a spider?

[gdub73]

AlPackin, on 16 October 2011 - 09:03 PM, said:

I'm curious about a spider hexa frame like David's http://forums.openpi...x-by-blueskyrc/  and Holco's spider

The closest frame type in the GCS in the Hexacopter X.  Do you think a custom mixer setting would be beneficial for a spider?

hi, i have just built 1 of these spiders, just using the factory hex x config, flys mint, probally needs a little tweaking

[IceWind]

AlPackin, on 16 October 2011 - 09:03 PM, said:

I'm curious about a spider hexa frame like David's http://forums.openpi...x-by-blueskyrc/  and Holco's spider

The closest frame type in the GCS in the Hexacopter X.  Do you think a custom mixer setting would be beneficial for a spider?

There isn't much different between a Hexa X and the Spider X in regards to motor layout The motor layout is exaclty the same,
the only thing changing is the frame layout that is different and allows better visual identification of the front/back as well as for
FPV or normal AP moves the props out of the image.
Even the CG and the disposition of the heaviest components is the same around it's center point.

Edited by IceWind, 20 October 2011 - 01:25 PM.

[m_thread]

This is a question probably mostly to Mat who i know successfully configured a custom mix for his v-tail copter.
I´m in the final stages of my quad v-tail build and i would like some help creating a mix for that setup. Is there any major direction to follow when doing a v-tail setup?


Regards
/F

[rcadey]

m_thread, on 06 November 2011 - 05:05 PM, said:

This is a question probably mostly to Mat who i know successfully configured a custom mix for his v-tail copter.
I´m in the final stages of my quad v-tail build and i would like some help creating a mix for that setup. Is there any major direction to follow when doing a v-tail setup?


Regards
/F

m_thread,

did you ever get anywhere with this - I'm currently trying to set up a v-tail and am looking for some help

rob

[timbocan]

Hi  i just thought you might want to check out  Matt's post  for his Vtail Y4  & Vtail Y6
i think it was on page 3 or 4 .  it helped me get in the air.
hope that helps  rob.

[r691175002]

I've been playing with this feature and I think there is a lot of potential for more curves and better integration of curves and flight modes.

If flight mode could change the curves it would allow normal/idle up modes on helis and other variable pitch builds.  It would be even more useful to simply allow changing the entire mix when switching flight modes.


As well, I can think of a few situations where having more curves (or being able to pass an additional accessory channel through the mix) could be beneficial.

[Aerhead]

r691175002, on 13 December 2011 - 01:43 AM, said:

I've been playing with this feature and I think there is a lot of potential for more curves and better integration of curves and flight modes.

If flight mode could change the curves it would allow normal/idle up modes on helis and other variable pitch builds.  It would be even more useful to simply allow changing the entire mix when switching flight modes.


As well, I can think of a few situations where having more curves (or being able to pass an additional accessory channel through the mix) could be beneficial.

Look here.

http://forums.openpi...or-the-outputs/

[MikeH]

Mat Wellington, on 28 July 2011 - 09:23 AM, said:

The guide below will get fleshed out over the next week or so (have a shutdown at work, 12 hr days for 2 weeks - yay so will see how time allows )

Do you happen to work at a nuclear power plant?

[Mat Wellington]

Nope, oil and gas.
And I should have been back to finish off this topic - sorry guys