Important Ccpm Programming Do's And Don - JR Vibe 90SG Assembly Instructions Manual

ImPortAnt ccPm ProgrAmmIng do's And don'ts
A. TRAVEL ADJUST
It is extremely important that the travel adjustment values for the three CCPM servos (aileron, elevator and Aux1)
be initially set to exactly the same travel value. If the travel value is not similar for each servo, it will create unwanted
pitching and rolling of the swashplate during collective pitch inputs. The travel values for each servo will be adjusted
in the final radio setup to remove any minor pitch and roll coupling during pitch, roll and collective movements.
Minor travel value adjustments are necessary due to slight variations in servo travel and centering. Although the
three servos may appear to travel at the same amounts in each direction, in reality the servos can vary slightly. This
variation is more common in analog-type servos. If JR's new digital servos are used, the travel adjustment values will
generally not need to be altered.
B. SERVO REVERSING
It is also extremely important that the servo reversing directions for the three CCPM servos (aileron, elevator, Aux
1) be set as indicated in the upcoming radio programming steps. If one or more servos is not set to the correct
direction, the CCPM function will be out of synchronization, and the three control functions (Aileron, Elevator,
Collective) will not move properly. In the event that a control surface is working in the wrong direction, the control
function can only be reversed by changing the desired CCPM value for that function from a (+) to a (-) value or vice
versa.
Example: If when you increase the collective pitch, the pitch of the main blades actually decreases, it
will be necessary to access the CCPM function and change the travel value for this function from (+)
to (-), or (-) to (+). This will reverse the direction of the collective pitch function without affecting the
movement of the aileron and elevator functions.
C. CCPM SERVO CONNECTIONS
The JR® 120°/140° CCPM system requires the use
of three servos to operate Aileron, Elevator and
Aux1(Pitch). The labeling of these servos can become
quite confusing because, with the CCPM function, the
three servos no longer work independently, but rather
as a team, and their functions are now combined. For
this reason, we will refer to the three servos in the
following manner:
Elevator Servo: This is the top left servo. The channel
number for this servo when using a JR
radio is CH3.
Aileron Servo: This is the top right servo. The channel
number for this servo when using a JR
radio is CH2.
Aux 1 (Pitch) Servo: This is the front left servo. The
channel number for this servo
when using a JR radio is CH6.
Please refer to the CCPM connections chart below for clarification. For non-JR radios, please consult your radio
instructions for proper connection.
Pitch Aileron
Servo Servo
Elevator
Servo
47
Pitch Rudder Elevator Aileron
Servo Servo Servo Servo
Throttle
Servo