Tutorials : Setting up a Voltij

by Steve Lange, July 2005

Here's a mini-tutorial/introduction to the wonderful world of Multiplex Programming or 'the way it should be!'... The subject will be a Voltij aerobatic glider by Aeromod.

A summary of what is to follow:

  1. The creation of a new model memory
  2. Selection of model type
  3. Selection of transmission mode
  4. Assignment of controls
  5. Assignment of servos
  6. Setting up mixers
  7. Modifying curves
  8. Changing model name

Once you learn the basics of the Multiplex approach to programming, which will be demonstrated in the following, you will understand why no manual is needed...it's just that easy!!

Here goes...

Main screen turn on. This is the default screen, showing model selected, voltage, etc. We need to go into the menus...
Menu 1. We're going to FILES in order to create a new model memory.
We got to CHANGE in order to switch from the current model memory (Weasel Pro) to a new, blank model memory...
The word "---EMPTY---" was blinking here, indicating a new blank model memory, but my timing was off and I didn't catch the test. Regardless I pressed R all the same...
There are a number of templates available, but we don't want no steeenking templates, we want freedom! Hence the choice of UNIVERSAL - No Presets. Perfect.
Next we hop over to Menu 4, and select TR. MODE (transmission mode)
The default transmission mode is PPM9 and Multiplex (MPX) centers, we want "Other" centers as we are using Hitec servos and a Futaba receiver...
There we go, OTHER.
Now on to Menu 2 for some control assignments! Moving right along then, aren't we?
This is quite straightforward... you just say which control (i.e. stick, or slider, or switch, or whatever) you want to control what function. What a novel concept!!!
They even label the widgets for you! What lovely people the Germans are!
Control B (throttle stick)...FLAPS please!
Now on the the right stick...look, labels here too! How simple can it be??
I'll take my ailerons on control C please...
...and my elevator on D. Splendid!
Sha-boom! On to the servo assignments! SERVOS it is.
Servo 1 (i.e. the servo located in plug position #1 on your receiver)...UNUSED for now, but not for long!
We want this to be a flaperon with snapflap abilities, and while there are some pre-made mixes that allow this, we don't want no steeenking premade crap, we want TOTAL CONTROL. Hence, we choose a Servomix and define everything ourselves!
Same goes for this servo (aileron #2). Yes, you can have both your ailerons on channels 1 and 2 if you want...or whatever you like. It don't matter, it's all up to whatever you want. THE WAY IT SHOULD BE!!!!!!
And we'll assign servo 3 to elevator. You can have it be ELEVATOR or ELEVATOR TRIM, we want ELEVATOR TRIM so the trim lever will be effective.
Next we bounce back to Menu 2 and select MIXERS so that we can do our flaperons/snapflap mixing...
OK, the assign mixers page. We assigned the servos 1 & 2 to servomixes, now we define those mixes... this is servo 1, so we will rename the servomix from SERVOMIX to RT AILERN...
Very nice! Now on to the input mixing...
First off, aileron trim. Boom!
Next mixer input...Flaps. It's good!
Last mixer input...elevator (for the snapflaps). Voila! What could be easier??
And now we repeat for servo 2...takes what, maybe 10 seconds to do each servo? Easy like pie!
With the mixers done, it's on to Menu 1 to setup our servo curves...whoopee, the home stretch! I've got a total of about 5 minutes of actual programming time invested at this point...and about 25 minutes of typing & picture uploading time! L
OK, we want TRAVEL/CURVE...but note the options... i.e. 3,5,7,9,13pt. curves... ahh, life really can be THIS GOOD!
For now, no fancy curves needed. First we set up our servo #1... because we did the RT AILERN servomix, we'll have three curves to adjust: Aileron, Flap, and Elevator. Each defines how much the servo will move in response to each control input.
For ailerons, I want total movement...so +100% on one side, and -100% on the other. Can be easily reversed as needed by pressing the R key...
Next control input, the flaps. Starts off at zero, I'm going to be doing "4 axis" flying, so I'll leave zero in the center and make it +50% and -50% at either end of the flap stick travel, respectively.
Boom, it's done! So darn easy it makes me wanna smack myself.
Next up, snapflap elevator control input. This lets me set up how much the aileron moves in response to elevator input. I'm going +10% and -10% for now, can tweak as needed later...
Boom, it's done. Having set up servo 1, we do the same for servo 2. Takes another, oh, 30 seconds?
Now on to the elevator. I'll adjust this later, so for now it's +100% and -100%.
Lastly, rudder. +100% and -100% for now, will tweak later. Zee programming eeees done!!! Woooooooot!
One last thing to do...let's name the model memory, no? Back to Menu 1, select FILES and then NAMES
NAMES brings you to this screen. UNIVERSAL is the default name for UNIVERSAL model types, but we want it to read VOLTIJ instead...
Voila! Tres Bien!
Eh, supercool, non?
Move my happy little servos, move like the wind!