Spectrum DX8 2 Switches 1 TX channel 6 Flight Modes

Spectrum DX8 

2 Switches   1 TX channel

6 Flight Modes

You don’t need to sacrifice 1 RX channel to mix 6 Flight Modes out of two switches.

Just mix Aux2 to itself in 3 different ways depending on the position of the

F Mode switch.  You need to have Flight Mode enabled with the F Mode switch.

First go to Servo Setup and set Aux2 Travel to 85%

Then go to Mixing and select Mix 3, 4 and 5 und set it up as shown in the following pictures.

You will then get the Flight Modes a pictured below.

The good thing is, if the Flap/Gyro switch is in the middle (pos1) you always get

APM Flight Mode 4, which you could assign to Stabilize. 

So you have still the channel Rud and Aux3 free for other useful things.

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Comment by Peter Klimon on March 11, 2013 at 3:25pm

Manfred - That link was excellent. Almost makes me want to try regular copter instead! :-)

Comment by Manfred Dickgiesser on March 11, 2013 at 5:51pm

Peter

Just do the hole Radio Calibration, this will also calibrate the ch5.

 

Yes I’m a traditional Heli lover, but there still some problems with 2.9.1 Heli, so I won’t explore the full potential of this setup until the firmware feels save to me. Too expensive to crash.

Comment by Peter Klimon on March 11, 2013 at 9:56pm

Manfred - I checked the link you provided but that is mainly for Heli? I presume since i am on Hexacopter I need to follow the section related to Quad rotors? 

I am curious though I noticed there is considerably more settings to adjust for a Heli. Do I need to go to that level of calibration for Hexacopters? The calibration page for Hexacopters was no where near as detailed. Is it possible I am missing some sections in? Here is the link I used for calibration: https://code.google.com/p/arducopter/wiki/AC2_First

Comment by Peter Klimon on March 11, 2013 at 10:25pm

Manfred - In the Switch Select where should I link AUX2 after I link GEAR to AUX2? Should I leave it on INH or do I link it to GEAR? (it would seem logical that if you set Gear to Aux2 then you would also want to set Aux2 to Gear?) Please clarify if I am incorrect. I am trying very hard to understand "cause & effect" which is missing from the DX8 user manuals...

My current settings are 

Trainer: Inh             Flap: Inh
F Mode: Aux1          Mix: Inh
    Gear: Aux2        Aux2: Inh (It seems if I set Gear to Aux2 the only option for Aux2 is Inh or Gear)
  L Trim: Inh          R Trim: Inh
                             Knob: Aux3

This is the part (Switch Settings & Mixes) I find most confusing and the Spektrum user manual is totally useless for new users! Unfortunately I did not read the user manual before I purchased the DX8. If I had I probably would have went with Futaba instead or Hitec. Their manuals are considerably more informative. To make matters worse I cannot seem to find any good resources on learning how to program the various capabilities on the DX8 and there is certainly far too few resources on fundamentals of DX8 programming! Luckily we have this site and dedicated users like yourself willing to take the time to answer questions. 

Comment by Manfred Dickgiesser on March 11, 2013 at 10:25pm

Don’t worry, the radio calibration are the same in both Heli and Hexa

Comment by Manfred Dickgiesser on March 11, 2013 at 10:27pm

In your case you only need the calibration part.

Comment by Peter Klimon on March 11, 2013 at 10:38pm

Manfred - RE: "2.   Then go to Servo setup and set AUXx to 85% , 80% travel. (With this you can can then fine trim to fit the PW)"

Can you please clarify this part or point me in the proper direction? I am having difficulty on how to do this.

My current understanding is that I need to tune the percentages, is this correct? If so how can I tell if I have the proper percentages? I seem to have read somewhere to make a change in the DX8 and then watch to see the new readings in the Hexacopter calibration page for flight modes? Sorry I have not had the time yet to try this due to scheduling conflicts so any feedback would be most helpful....

Comment by Peter Klimon on March 11, 2013 at 10:50pm

RE: Comment by Manfred Dickgiesser on Saturday

...

It’s actually dead easy, just be concerned about the AUX you like to have the flight modes assigned to, so let’s call it AUXx.

 

If you have your RC flight mode at AUXx and use the Gear and the F Mode switch to select your Flight Modes ,

do the following:

 

1.   Go to “Switch Select” and link the Gear switch to AUXx

      Have F Mode Inhibited.

2.   Then go to Servo setup and set AUXx to 85% , 80% travel. (With this you can can then fine trim to fit the PW)

      !!! Check with the RC Monitor if AUXx is going from -85 to 80 when toggling the

      Gear switch. If yes, Good!

 

3.   Then go to Mixing Mix2.

  1. Mix AUXx to AUXx
  2. Rate both -40%
  3. Offset 0%
  4. Sw FM1

 

4.  Then go to Mixing Mix3.

  1. AUXx to AUXx
  2. Rate both -80%
  3. Offset 0%
  4. Sw FM2

Check again with the RC Monitor if AUXx is moving if you toggle the F Mode switch. It should move on the left  site from neutral if the Gear switch is down and on the right, if the Gear switch is up. If yes, Good, it should work.

 

!!!  At Servo setup AUXx Travel you can then fine trim to fit the required PW readings for each of the 6 APM Flight    Modes.

 

You will get 6 Flight Modes. If your Gear switch is 0 then you will get the first 3 when switching F Mode switchfrom 0 to 1 to 2, and if the Gear switch is 1 then you will get the second 3 when switching F Mode switch from 0 to 1 to 2.

...

--------------------------------------

Several questions I hope will help others to understand what is going on here:

Item 1: So if you set FMode to anything else but INH in this configuration it would not work? Please clarify.

Item 2: I change these percentages to increase or decrease the PWM reading, Correct? Do I have to adjust both percentages or just one or the other? Will these changes affect some other setting elsewhere?

Item 3: Do I need to adjust any of these percentages to affect the PWM tuning or is that done only in Item 2?

Comment by Peter Klimon on March 11, 2013 at 10:50pm

RE: Comment by Manfred Dickgiesser on Saturday

...

It’s actually dead easy, just be concerned about the AUX you like to have the flight modes assigned to, so let’s call it AUXx.

 

If you have your RC flight mode at AUXx and use the Gear and the F Mode switch to select your Flight Modes ,

do the following:

 

1.   Go to “Switch Select” and link the Gear switch to AUXx

      Have F Mode Inhibited.

2.   Then go to Servo setup and set AUXx to 85% , 80% travel. (With this you can can then fine trim to fit the PW)

      !!! Check with the RC Monitor if AUXx is going from -85 to 80 when toggling the

      Gear switch. If yes, Good!

 

3.   Then go to Mixing Mix2.

  1. Mix AUXx to AUXx
  2. Rate both -40%
  3. Offset 0%
  4. Sw FM1

 

4.  Then go to Mixing Mix3.

  1. AUXx to AUXx
  2. Rate both -80%
  3. Offset 0%
  4. Sw FM2

Check again with the RC Monitor if AUXx is moving if you toggle the F Mode switch. It should move on the left  site from neutral if the Gear switch is down and on the right, if the Gear switch is up. If yes, Good, it should work.

 

!!!  At Servo setup AUXx Travel you can then fine trim to fit the required PW readings for each of the 6 APM Flight    Modes.

 

You will get 6 Flight Modes. If your Gear switch is 0 then you will get the first 3 when switching F Mode switchfrom 0 to 1 to 2, and if the Gear switch is 1 then you will get the second 3 when switching F Mode switch from 0 to 1 to 2.

...

--------------------------------------

Several questions I hope will help others to understand what is going on here:

Item 1: So if you set FMode to anything else but INH in this configuration it would not work? Please clarify.

Item 2: I change these percentages to increase or decrease the PWM reading, Correct? Do I have to adjust both percentages or just one or the other? Will these changes affect some other setting elsewhere?

Item 3: Do I need to adjust any of these percentages to affect the PWM tuning or is that done only in Item 2?

Comment by Manfred Dickgiesser on March 11, 2013 at 11:45pm

Item 1 :  

FMode is Inh, so it drives no other output ch.  But if you need to drive an output ch for some reason, you can assign any ch to it.

 

Item 2:

Yes you  adjust the PW reading with the travel change  on one or both sites, it depends  if you have to adjust the first or second three of the 6 modes. It won’t affect anything else.

 

Item 3:

You can also play around with the rate percentages at the Mixing part to adjust more if the adjustment in Item 2 is not enough.

 

 

But my example should work close enough, you don’t have  to have the PW readings exact in the middle.

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