# Build Guide: Bulldozer

**20 February 2025**

## Introduction

The bulldozer attachment lets your Rover push objects around using a sturdy blade. It clips onto the front of the Rover via the bolt clip adapter and is powered by a continuous servo motor. This guide will walk you through printing and assembling the attachment step by step.

## What You'll Need

**Parts:**

- 1x Servo Horn
- 2x Servo Mounting Screws
- 12x M3 x 8mm Screws
- 2x M3 Nut
- 1x Micro Servo (Continuous)

**Tools:**

- Phillips Head Screwdriver
- M3 Allen Key

## Download the free STL files

Thingiverse](https://www.thingiverse.com/thing:6955418) Printables](https://www.printables.com/model/1199183-micromelon-bulldozer-attachment) Makerworld](https://makerworld.com/en/models/1129214#profileId-1129115)

## 3D Print Your Parts

- 1x Left Arm
- 1x Right Arm
- 1x Bucket
- 1x Servo Mount
- 1x Servo Mount Roof
- 1x Screw
- 1x Pushing Shaft
- 1x Rover Shell

## 2 Attach the Arms

- Connect the left and right arms to the rover shell. Note left and right is defined when looking from the back of the rover to the front.
- Insert nuts into both arms as shown.

## 3 Attach the Bucket

- Connect the bucket to the arms using two M3 screws.

## 4 Install the Servo

- Insert the servo into the servo mount and secure using two servo screws.
- Attach the servo horn to the servo, then push the screw on top.

## 5 Attach the Servo Mount Roof

- Push the servo mount roof onto the servo mount. The fit should be tight, and the screw should click into place.
- Secure the roof and the servo mount together using four M3 screws.

## 6 Attach the Pushing Shaft

- Screw the pushing shaft partway along the screw.

## Final assembly

## 7 Final Assembly

- Connect the servo assembly to the rest of the attachment using four M3 screws as shown.

## You're Done!

Your bulldozer attachment is fully assembled and ready to clip onto your Micromelon Rover. Try pushing lightweight objects like ping pong balls or small blocks around a course. You can program the servo to raise and lower the blade using the Code Editor.