We will mount our two servo motors so they're pointing perpendicular to each other.

Front servo

Please be careful with paper cutting knives and scissors.

The larger of the two servos, the SG-5010, will be used to power the front legs. 


Trace the outline of the servo housing on the bottom of the box, about an inch from the front edge. Carefully cut out this hole using a cardboard knife or an X-acto blade.


Feed the wires through the hole from the bottom.


Press the servo housing into the hole.

Back servo

Use a pencil to trace the outline of the smaller servo motor on the back edge of the box.


IMPORTANT: Position the servo so the central rotation point is directly in the middle.


Cut out this hole with a cardboard knife or x-acto blade. 


Press fit your servo motor into this hole. 

Glue motors in place

DANGER! BURN WARNING! Hot glue is very sticky and it's easy to accidentally burn your fingertips. Be careful when using it.

Use dabs of hot glue around both servos to hold them firmly in place.

Attach the Legs

IMPORTANT! Rotate the servos back and forth to see where their extents are (how far they move in each direction until they stop). Move the servo with a horn attached gently in both directions until it stops. When done, pick the rough middle of the 180 degree pivot range.


Mount the legs in the middle, so they are free to rotate about 90 degrees in each direction.


Mount servo hubs onto the motors.


Use the provided screws to fasten the legs firmly to the servo horn.

Trim the Legs

The front legs may need to be trimmed down so the robot sits about level.

Trim the corners off each front foot to prevent the edges from getting caught on small obstacles as it stumbles along.

This guide was first published on May 30, 2018. It was last updated on Nov 20, 2023.

This page (Build It!) was last updated on May 23, 2018.

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