Hello,
What you are searching is what i could call a "multi-function slider".
2 cases :
case A : the projector have, in its internal behavior, this multi channel ability you want.
Then you don't have much to do excepting using this specific channel.
case B : The projector doesn't have this ability and what you want is to "create", using QLC+, this ability on one slider.
You have 2 possibilities. one is easier than the other
Possibility 1 : Slider's Cue
Create a Cue. The cue have a special "multi-functional specific to cue slider" available into its properties tab "side fader" then select radio-button called "steps". you will have to add the steps you want for your motor.
a tutorial is given by Massimo into its video tutorial : see
https://www.youtube.com/watch?v=8-bgVX4uT2E at video-time 18:42.
maybe you will have to add 255 steps to do what you need or you find an easier way.
Possibility 2 : Use a heavy trick.
you will have to trick/cheat. And the trick is heavy.
The trick i used :
the "multi-function slider" activate 3(for example) "dummy dimmers" at the same time from 0 to 100%.
Each "dummy dimmers" have a different mapping (see image) :
from 0 to 100% of slider, the first dummy dimmer could activate only during the 33 first % whereas the second could activate after 33%.
after that configured, the output of dummy dimmer's is recopied to the real DMX universe on wanted channel(s).
I have
provided a example for you to try and modify for your motor's needs.
you can find it here :
This example use one slider with 3 steps :
slider from 000% to 033% => red channel 1 goes from 0 to 255%
slider from 033% to 066% => green channel 2 goes from 0 to 255%
slider from 066% to 100% => blue channel 3 goes from 0 to 255%
you will maybe have to add one more step to invert the signal depending on the direction of your motor. this can be done on inverting a slider.
the trick is a bit heavy but if you manage to do so and you really need it...
I think what you want could be an improvement to QLC+, but it's not so easy to implement and to render without losing some user in the move except if well documented and intuitively displayed.
Have fun.