Install Ball Bearing

The 608ZZ ball bearing is press fitted into the circular cavity in the servo holder. It should have a snug fit.

Install Servo Motor

Place the servo motor into the holder with the shaft lined up with the bearing. Reference the photo for correct placement.

Secure Servo Motor

Install and secure screws to the servo holder while holding the motor in place.

  • 2x M2.5 x 8mm

Second Servo 

Repeat the servo holder assembly for the second servo motor. Note the servo motors are mirrored.

Servo Arm & Wing Holder

The wing holder is secured to the servo arm with two screws and nuts.

  • 2x M3 x 10mm
  • 2x M3 lock nuts

Install Wing Holder Nuts

Two lock nuts are force fitted into cavities on the servo arm.

Insert a screw through one of the holes on the servo arm.

Use pliers to secure a lock nut onto the screw threads.

While gripping lock nut, fasten the screw to force the lock nut into the cavity.

Remove the screw by unfastening from the lock nut.

The lock nuts should remain installed inside the servo arm. Repeat this process for the second hole.

Install Bearing Nut

Use another screw to secure a third lock nut into the servo arm.

Using pliers, repeat the same process for installing the lock nut.

Remove the screw from the lock nut once it's installed.

Secure Wing Holder

The wing holder is now ready to review to the servo arm.

Place the wing holder over the servo arm.

Line up the mounting holes. Insert and fasten two screws into the lock nuts.

Repeat process for the second mounting hole.

Install Servo Horn

Get the servo horn and screw ready to install into the servo arm. The micro servo includes a few different horn and screws. Use the single armed horn and screw. Reference the photo for the correct servo horn.

Secure Servo Horn

Insert the servo horn into the cavity on the servo arm.

Press fit the servo horn into the servo arm.

While holding servo horn in place, insert and fasten screw.

Tightly fasten the screw to secure the servo horn to the servo arm.

Assembled Servo Arms

Repeat this process for the second servo arm. The two servo arms are identical.

Servo Bearing Screw and Pin

The ball bearing requires a screw and pin.

Insert the screw into the pin. Reference the photo for correct placement.

  • M3 x 15mm

Install Bearing Pin

Insert the pin with the screw through the center of the ball bearing.

The pin has a loose fitting and will need to be held in place when securing it to the servo arm. 

The pin is installed temporarily.

The servo must be calibrated before installing servo arm.

Calibrate Servos

Before we can complete the assembly, the servos must be calibrated.

Connect the two servos to the Servo FeatherWing.

Turn on the PowerBoost 1000C. Code and libraries should be already installed and uploaded to Feather M4.

Observe the shaft and take note of the positions when it is rotating.

Use a piece of tag to create a flag. Wrap it around the shaft of the motor. 

Flag Markers

A flag is a good way to indicate the position of the servo shaft. Use this to reference the best placement for the servo arms. A piece of tape serves well, wrapped on the shaft upon itself.

Turn off the circuit when the wings are paused and fully "opened".

Install Servo Arms

Remove the flags and begin to install the servo arms.

Remove the bearing pin and screw.

Carefully place the servo horn over the shaft of the servo.

Check the position of the servo matches the position of the flag.

Press the servo horn onto the shaft of the servo.

Secure Bearing Pin & Screw

Reinstall the bearing pin and screw.

Insert the screw into the lock nut that is press fitted into the servo arm.

Fasten and secure the screw to the servo arm.

Assembled Servo

The servo arm is ready for testing.

Be careful not to move the servo arm.

Forcefully moving the servo arm could strip the gears and damage the motor.

Second Servo

Repeat the assembly process for the second servo.

Adjust cables from the servos so they are not kinked when the servo arm is in motion.

Assembled and Calibrated

Time to test the two servos.

Connect the servos to the Servo FeatherWing.

Turn on PowerBoost 1000C. Code and libraries should be installed and uploaded.

Check the position of the servo arms are in the desired position.

This guide was first published on Feb 24, 2021. It was last updated on 2021-02-23 19:16:05 -0500.

This page (Servos Assembly) was last updated on Oct 15, 2021.

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