5-1
34
Servo Arm Preparation and Installation
......... 3 pcs
2 x 10 mm Flat Head Screw
..........3 pcs
Steel Joint Ball
.........3 pcs
2 mm Hex Nut
It will be necessary to prepare three servo arms as shown in the diagram below. Prior to assem-
bling the servo arms, the servos should be centered as indicated below, and the servo arms test
fitted to the servo to insure that the arms will attach to the servo as indicated. Since the JR servo
arm spline uses an odd number of teeth, it is sometimes possible to rotate the servo arm 180° to
achieve a more correct positioning.
Once the best direction for the servo arm has been decided, mark the servo arm with the servo it
is to be connected to (F, R, or L), as well as the side of the servo arm that needs to be removed.
It is
very
important that a heavy-duty type servo arm be used with the control ball location
placed at exactly 20 mm as shown. For JR radio users, we recommend the JRPA215 heavy-duty
servo arms for this use. If a control ball position other than the specified 20 mm is used, this will
create an adverse affect as to the travel of the swashplate, as well as unwanted control differential
and interaction.
Note:
Prior to attaching the servo arm to the servo, it will be necessary to first turn on the radio
system to center each of the three CCPM servos. It is important that the radio’s collective
pitch stick be set at the center position. If your radio is equipped with a hover pitch knob,
please check to make sure that this knob is also in the center position at this time.
Connect the three servo arms to the three CCPM servos as shown. It is important that the servo
arms be positioned parallel to the servos as shown. If the servo arm is not parallel as shown,
minor centering adjustments can be made using the radio’s sub-trim function. Please refer to
Section 7-2 for more information.
Use Blue Threadlock
Steel Joint Ball
2 mm Hex Nut
2 x 10 mm Flat Head Screw
Remove this section.
JRPA215 Heavy-Duty Servo Arm
20 mm
Blue Threadlock
8.4V
JR
REMORE
CONTROL
MADE IN JAPAN
Right Servo
Servo arms must be parallel
to servo as shown.
Front Servo
Left Servo
