Howdy and welcome back! We made it… After all the hard work, the finished product is here, looking slick, and spinning motors.
Figure 1: BOOST-DRV8711 Standalone
In my previous posts, we pieced together a system, found our components, conquered the mighty schematic, and reviewed, reviewed, and reviewed some more. All of these steps helped put a stepper motor drive system into the palm of our hand! Now we want to share this with everyone, so that you too can spin a motor.
Figure 2: BOOST-DRV8711 on MSP-EXP430G2
The BOOST-DRV8711 is a 8-52V, 4.5A, bipolar stepper motor drive stage based on the DRV8711 Stepper Motor Pre-Driver and CSD88537ND Dual N-Channel NexFETTM Power MOSFET. The module contains everything needed to drive many different kinds of bipolar stepper motors and can also be repurposed as a dual brushed DC motor driver. The BOOST-DRV8711 is ideal for those wishing to learn more about stepper motor control techniques and drive stage design. This kit was designed to be compatible with all TI LaunchPads following the LaunchPad Pinout Standard, with primary software/firmware support being provided for the MSP-EXP430G2 LaunchPad with a MSP430G2553.
The BOOST-DRV8711, while compact, provides a punch, able to deliver 4.5A continuously out of each H-bridge. This allows it to drive a wide variety of bipolar stepper motors on the market today without excessive heat sinking.
Figure 3: H-Bridge A and B Driving Max Current
Figure 4: Thermal Performance While Driving Max Current
The motor control application (developed with TI’s Code Composer and GUI Composer tools) provided with the BOOST-DRV8711 for the MSP430G2533 allows you to quickly spin almost any bipolar stepper motor you have on hand in a matter of minutes. The application provides both a speed and step motion profiles while allowing you to finely adjust the drive settings of the DRV8711.
Figure 5: Stepper Motor Control Application
With these tools in hand you are ready to spin your own stepper motor! Thanks for reading and feel free to leave any comments or questions you might have!
You can also check out earlier installments of the series (the stages of developing this board) at…
- Spin It! - Part 1 (Introduction)
- Spin It! - Part 2 (Component Selection)
- Spin It! - Part 3 (Schematic Capture)
- Spin It! - Part 4 (Dos and Don’ts of Layout Design)
- Spin It! - Part 5 (Dos and Don’ts of Layout Design Cont.)