Important Ccpm Programming Dos And Don'ts - JR ERGO Assembly Instructions Manual

Table of Contents

A. 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.

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 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.

C. 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.