HiLetgo TB6600 Stepper Motor Driver 32 Segments DC 9-40V 4.0A Suitable For 42/57/86 Type 2-Phase 4-Phase Stepper Motor

The HiLetgo TB6600 Stepper Motor Driver is a product that has been met with mixed customer experiences. One reviewer reported running nema 23 motors with plenty of power supply for over two weeks without any issues. However, another reviewer purchased two of the drivers for their router build and found them to be clunky and miss position right out of the box. This reviewer warns against purchasing this product and claims that the manufacturer cut corners on a $0.50 component and has bad circuit design. They also report that in the course of testing, the driver overheated and failed short circuit after about two minutes, leading to the conclusion that this driver is substandard and not fit for purpose. In terms of technical details, the HiLetgo TB6600 Stepper Motor Driver uses a 4n25 optoisolator on the pulse input, which could work at up to 250kHz or even 1MHz with clever design. However, in practice, this manufacturer used optoisolators that result in a 1us rise time and 60us fall time, leading to a maximum pulse rate of 15kHz. Comparatively, quality drivers use a 6n137 optocoupler, which is designed for data transmission and is designed for up to 10MHz and may work past 20MHz in this application.