Horizon Hobby Vibe 500e, Assembly Instructions Manual

Page: 29 / 76

29
understAndIng ccPm control systems
The JR 120° three servo CCPM relies on the radio’s special CCPM swashplate mixing, rather than a conventional
mechanical mixer that is utilized to achieve the same results.
The radio’s 120° 3-servo CCPM function automatically mixes the three servos to provide the correct mixing
inputs for aileron (roll), elevator (pitch), and collective. The following is an example of how each control input
affects the servo’s movement.
1. COLLECTIVE
When a collective pitch input is given, all three servos move together in the same direction, at equal amounts, to
raise and lower the swashplate while keeping the swashplate level. During this function, all three servos travel
at the same value (100%) so that the swashplate can remain level during the increase and decrease in pitch. As
mentioned, this mixing of the three servos is achieved through the radio’s CCPM program.
2. ELEVATOR (PITCH)
When an elevator input is given, all three servos must move to tilt the swashplate fore and aft, but their
directions vary. The servos move together in the same direction, while the rear swashplate servo moves in the
opposite direction. For example, when a down elevator (forward cyclic) command is given, the front swashplate
servos will move the swashplate down, while the rear swashplate servo moves so that the swashplate will
tilt forward. During this function with 120° CCPM, the rear swashplate servo travels at 100%, while the front
swashplate servos travel at 50% (1/2 the travel value). This difference in travel is necessary due to the fact that
the position of the 120 CCPM rear control ball is two times the distance of the two front control ball positions as
measured from the center of the swashplate.
3. AILERON (ROLL)
When an aileron (roll) input is given, the front swashplate servos travel in opposite directions, while the rear
swashplate servo remains motionless, such as, when a right aileron command is given.