Teyleten Robot TMC2209 V1.2 Stepper Motor Driver for SKR V1.4 Turbo SKR 2 32Bit Control Board 3D Printer Parts (Pack of 5)

Great product

The heatsink overlaps the pins with a chance of shorting if the adhesive deteriorates, use nail polish on the pins before applying the heatsink, the 5th pin is from the wrong order for UART if you follow the picture above, it's the 4th by default! Pins are both skewed not parallel. Works plug and play on RAMPS 1.4 with Klipper otherwise. You can also invert the VMOT pin to the other side for external 27v power supply for full torque with StealthChop (silent mode)

Got these for my Anycubic Mega S and boy what a difference from the original drivers. I followed the advice from the other review below and from the internet, working so far doing a test print as we speak we shall see. Beyond that works great, so far I recommend!

I had to adjust the VREF for each. I put x, and both z's at 1v and then the y at 1.15 and the extruder at 1.2. runs smooth, quiet and cool to the touch. I am not running klipper, because there isnt a whole lot of advantage on this massive printer. The gains in speed are negated by the weight of the bed and gantry, and most other features you can get in marlin. So, I run standalone and Marlin 2.x

So far so good. Potentiometer, while still fragile, is smoother & easier to adjust than some others I've tried.

Working on a small stepper motor project with two 1.5A motors. I wired up everything but the motors, set my VREF at 1.69V then attached the motors. I started with one or two steps at a time, and both motors moved with no problems. After about 100 steps one of the motors quit working. Checked everything and finally decided to replace one of the drivers. That fixed it, but 10 steps later the one I hadn’t replaced produced a small fireball. To make a long story short, they all ended up smoked within 10-20 steps. My theory is my supply voltage of 24VDC is too high even though the specifications say otherwise. My control voltage was 3.3VDC.