Table of contents

Abstract

After the unboxing the main challenge is to manage the wiring between the elements, consequently, the first project consists in the wire crimping to avoid disconnections or short circuits

Project

Connector management for power and motor

To increase the possibilities in the TMC5272 EVAL board I added a second stepper motor to test the interfaces. But before starting any test, a crimping tool set is used to prepare the wires for the manufacturer's connectors. The provided power source is 12V@1A, which means that both motors could not run at the same time, only decreasing the power consumption in the TMCL IDE. The crimp tool is used to prevent damage to the provided power supply connector. A CCTV connector is used with two wires as a bridge between the board connector and the power connector.

{gallery}Supply Connector

The second motor is a SY20STH42-0804A from pololu, which features are compared with the provided motor below

Some of the electrical features are similar, consequently, the second motor can be used in one of the channels of the board in addition to the capabilities of the power IC according to its datasheet. Since the motor I had was from a really old project and I did not want to damage its connector, a large header connector is molded to avoid inserting of more wires into the interface. Finally, the motor connections are shown below.

Here is the complete setup to be mounted, where some nylon dividers are mounted to protect the table from scratches caused by the soldered terminals.

Board Assembly

Once the connectors are prepared, the the main boards must be assembled to avoid possible short circuits or damage to the workbench. To do this, a support is designed to keep everything in its place. Although the AD website has 3D models to improve the visualization and design, I found that the latest version of the boards have an offset of about 1 mm, which means that using the manufacturer's model could bring a bad design directly. In consequence, I used a caliper to guarantee the dimensions.

{gallery}Board Assembly

Some post-processing is required to complete the assembly. The designed pieces are usually manufactured by laser cut in acrylicSome post-processing is required to complete the assembly. The designed pieces are usually manufactured by laser cut in acrylic, consequently, some holes are reduced to create a thread for the screw mounting.

{gallery}post-processing