Wall-HP: Tracked Otto Remix – Built Different

Wall-HP Otto

This remix transforms the original Otto robot into a compact tracked robot inspired by small industrial exploration robots. Instead of the original walking leg mechanism, this design introduces a new wheeled chassis with side track modules that give the robot the appearance of a tracked vehicle.

The robot keeps Otto’s recognizable ultrasonic sensor “eyes,” mounted on a raised head bracket to maintain the familiar personality of the original design. The body has been completely redesigned to support the new layout and includes small side arms that give the robot additional character.

While the tracks provide the visual style of a tracked robot, the movement itself is powered by hidden wheels driven by two servo motors. This keeps the mechanism simple, reliable, and easy to print while maintaining the playful spirit of the original Otto robot.

This remix was modeled from scratch to give Otto a new personality and structure while keeping compatibility with the core Otto electronics. A prototype of the model was successfully 3D printed to verify the fit and appearance of the design.

Electronics Required

The design is compatible with the standard HP Robots Otto electronics:

• HP Robots Mainboard

• HP Ultrasonic Sensor

• 2 × HP Servo Motors (used as wheel motors)

• HP Battery Pack

Basic Assembly

1. Install the Servo Motors
   Insert the two HP Servo Motors into the motor mounts inside the chassis and secure them using the standard servo screws.

2. Mount the Wheels
   Attach the drive wheels to the servo shafts according to the HP Otto kit instructions.

3. Install the Mainboard
   Place the HP Robots Mainboard into the designated mounting area inside the body and secure it with screws.

4. Install the Battery Pack
   Insert the HP Battery Pack into the battery compartment and connect it to the mainboard.

5. Mount the Ultrasonic Sensor
   Install the HP Ultrasonic Sensor in the raised head bracket to form Otto’s classic “eyes.”

6. Attach Decorative Parts
   The neck, arms, and decorative track pieces can be attached using a small amount of superglue.

7. Final Check
   Ensure all electronics are connected properly and that the wheels spin freely before running the robot.

Printing

Recommended print settings used for the prototype:

• Material: PLA

• Layer height: 0.28 mm

• Nozzle: 0.4 mm

• Walls: 3 perimeters

• Infill: 10%

• Supports: Required only for the track parts

All other parts are designed to print without supports.

Notes

The track modules are designed mainly for the visual appearance of a tracked robot. Movement is provided by wheels powered by the servo motors, which keeps the design easier to print and assemble while maintaining the playful spirit of the original Otto robot.

{No way you read this far! Anyway, thanks a lot — it would be greatly appreciated if you download, like, or upload a make. Keep building!}