By Chau To Introduction: This blog post will discuss some issues of the servo library (Servo.h) and how coding of the Hexapod was built including functions and subfuctions as well as some tips and troubleshooting. Note: Hexapod team drives 19 servos directly from the Arduino board (digital I/O pins), and it uses the built-in Servo.h […]
By W. Mevan Fernando Due to the first set of TECs we purchased being faulty, we decided to purchase a single high quality TEC with a current rating of 10A. This would provide enough cooling by itself to cool the print bed. The video below shows the print bed setup. A much larger heat […]
By W. Mevan Fernando Peltier cooling modules are solid-state active heat pumps that transfer heat from one side to the other based on the Peltier effect. A TEC has two plates, the cold and the hot plate. Between those plates are several thermocouples. All those thermocouples are connected together and two wires, the negative and […]
By: Anh Nguyen I/ X,Y,Z Resolution The object of this experiment is to calculate the resolution of the x, y and z axis of the 3D bio printer. First, the theoretical values from the manufacture’s specification sheet are used for the resolution calculation. Then the experimental values are used to calculate resolution. We will use […]
By Omair Tariq Scope It was determined that agarose gel will be used as the “ink” for the 3-D bioprinter. Agarose gel was chosen primarily because of its low cost and its use as an overlay for cells in tissue culturing. [1]. The gel point is the temperature at which the gel mixture transitions from […]
By Ali Etezadkhah – Project Manager When we started working on the Bioprinter, one of our main challenges was to redesign a new extruder mechanism. While the idea of using a syringe and a linear actuator to dispense the printing gel was good, the execution needed much improvement. The original extruder used a small syringe […]
by Suhyun Kim System Block Diagram The image above provides an overview of how each component is linked together within the rover. Camera/Phone: From a remote location, using the Arxterra interface we will be able to communicate via the phone and camera. The camera will provide an image to the Arxterra interface. Through the […]
By Maxwell Nguyen and Anthony Vo The first link below provides the BOM for the standard RoSco as provided by Arxterra. The second link sums the price of each part in order to provide a projected cost of the standard RoSco. Bill of Materials: Standard RoSco BOM Standard RoSco Cost: https://www.dropbox.com/s/kpw4iobx1h1ova2/standard%20rosco%20bom.xlsx The link below is […]
by Maxwell Nguyen 1. Trade off studies: 1 week Compare different motors and servos. Determine which motor and servo will best meet our subsystem requirements. 2. Test motor: 1 week Test/record current draw and RPM of motors at different voltages. 3. Test Servo: 1 week Test/record current draw of servo depending on required […]
By Suhyun Kim and Robert Licari For our new design of Rover, we will do some tests such as electrical tests, software tests and functional tests. The electrical tests would be minor and basic tests, and software and functional tests would be main tests for our project. Electrical Tests: 1 week duration Electrical Tests will […]