Embedded Files
Top-down view of the TSA prototype
Fabricating a replica of the TSA prototype consists of three major steps. Refer to Bill of Materials for the supplies you'll need to get started.
Assemble stepper motor support
3D print separator plate
Attach the string and a load
Step 1: Stepper Motor Support Assembly
Step 1: Stepper Motor Support Assembly
The stepper motor component of the TSA requires four materials: NEMA 17 1.8 deg Stepper Motor, NEMA 17 L-Bracket, 5mm Mounting Hub, and a screwdriver. Discussions regarding using a DC motor as an alternative option vs using a stepper motor can be found in the Design Considerations section in the TSA: Design Principles tab.
Attach the stepper motor to the L-bracket, screwing adjacent corners first using the screws came with the bracket.
Place the mounting hub onto the motor's shaft at the desired location. Secure the hub by inserting the small black screws that came with the hub and tighten it with the provided wrench.
#6-32 screws can easily fit underneath the motor and onto the L-bracket for securing the motor down.
Step 2: Creating the separator plate
Step 2: Creating the separator plate
The separator plate is a 3D printed component. The CAD file for the separator plate is in the Home - CAD Design tab under the TSA folder named separator. If you do not have access to a 3D printer, using the Rod method as discussed in the Design Considerations section in the TSA: Design Principles tab can be a potential alternative.
CAD file
Top-down view
Front view
Step 3: Attach the string and a load
Step 3: Attach the string and a load
There are various types of string that can be used for the TSA. The thinner the thread, the more twisting cycles will be needed to create a significant contraction of the string. This TSA model used only one string, however, a model with more strings is possible. The load must be able to move linearly in the direction of the force produced by the TSA. In this model, a spring was used as a method for measuring the force produced via. Hooke's law.
Loop the string through the mounting hub.
Loop through the separator plate and tie a knot at the end.
Add the hook to the tied end and the TSA actuator is ready. The motor setup and the separator plate must be secure down onto a platform.
Step 4: Powering TSA
Step 4: Powering TSA
Powering the TSA depends on the control method for the motor we are using. In this case, you can use any circuit/method for a stepper motor control. A good source for the stepper motor's circuit and Arduino can be found at Makerguides.com
Page updated
Google Sites
Report abuse