Two-Axis SCARA Sketcher (Team #11) ECE-342 Spring-2026

Software Engineering
System Design
Embedded Systems
PCB
Robotics
Hardware
Junior Design

The Two-Axis SCARA Drawbot is a robotic drawing system designed to convert user-defined digital drawings into physical drawings on paper. The system allows a user to create custom lines through a Python graphical user interface and automatically generates the motion required to reproduce those drawings using a two-joint robotic arm. The project was developed as part of Oregon State University's ECE 342 Junior Design II class and demonstrates the integration of software, embedded control, electronics, and mechanical design into a single functional system. The system uses a Raspberry Pi microcontroller, two motor drivers, two stepper motors, a relay-based emergency stop system, and a custom Python GUI. Users can create custom line-based drawings by specifying between one and five lines with lengths ranging from 1 to 10 inches. The Raspberry Pi processes these commands and generates motor control signals that drive the robotic arm through a SCARA-style linkage. A hardware emergency stop system provides an additional layer of safety by removing motor power independently of software operation. One of the most significant accomplishments of the project was successfully integrating multiple engineering disciplines into a complete robotic system capable of producing accurate drawings. Another major accomplishment was developing measurable verification procedures for each subsystem and interface. Some of the primary challenges included maintaining consistency between block interfaces, developing realistic verification methods, and balancing accuracy, speed, and simplicity within the overall design. Future improvements could include support for more complex drawings, closed-loop position feedback, and automated conversion of uploaded images into drawing commands.

0 Lifts 

Artifacts

Name Description
Project Summary Executive Project Summary for our SCARA Robot Arm project.   Download
Project Showcase Slideshow This is the slideshow to showcase our project. It focuses on the trials we went through to complete as much as we could in this time frame. We focused on what we learned, how we've grown, future ideas for success, and what needs to be different in the future.   Link
Feedback