49
(Right)
(Front)
(Left)
1. Travel Adjust
It is extremely important that the travel adjustment values for
the 3 CCPM servos (Aileron, Elevator, Aux 1) 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 steps 7.5 and 7.6 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.
2. 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 previous 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 vise 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.
3. CCPM Servo Connections
The JR 120° CCPM system requires the use of three servos to
operate Aileron, Elevator, and Aux 1(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:
Aileron Servo: We will refer to this servo as the “Left” servo.
The channel number for this servo when using a JR radio is CH2.
Elevator Servo: We will refer to this servo as the “Front”
servo. The channel number for this servo when using a JR
radio is CH3.
Aux 1 (Pitch) Servo: We will refer to this servo as the “Right”
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.
IMPORTANT CCPM PROGRAMMING DOS AND DON’TS
[SWASH TYPE]
3SERVOS(120•)
EXP
AILE
ELEV
PITCH
[NH
+60%
+60%
-50%
ENTER
SEL
ACT
+
–
CL
+
–
CL
+
–
CL
To reverse the direction
of a CCPM control
function it’s neccessary
to change the value from
+ to –, or – to + as
needed.
[SWASH MIX]
3servos
120
•
AILE
60%
ELEV
60%
∞ PIT.
-50%
G450 GYRO
(OPTIONAL)
(JRPG450)
ON/OFF
Switch
Harness
Charging Plug
R-600
Receiver
Antena
Pitch
Rudder
Elevator
Aileron
Throttle
Receiver
Battery
B1000
JRP9012.46 Robinson R22 Manual 10/6/00 5:06 PM Page 49
