KINGPRINT DRV8825 Stepper Motor Driver Module with Heat Sink for 3D Printer Rrerap Ramps 1.4 A4988 (Pack of 5pcs)

UPDATE 03/21/2019 New Title says it all. Arrived early February and installed in a RAMPS board, set to 0.82MV and all good. Well, all good for about 16 hours of printing anyway. Just pulled them all out and have gone back to the A4988 after the second one failed. It is a pity as they quietened the printing down a lot with the 1/32 Micro-stepping. I am a bit surprised as I am a fan of Kingprint with with several main boards that have proven to be exceptionally reliable, but this latest batch of drivers -- not so much it seems. This is the second batch of DRV8825 I have had from them. The first lot bought in mid 2018 have been excellent and still running reliably. Will order from a different supplier and try again.

These work just fine. Remember to adjust the screw for what you need. If running for a long time keep a fan blowing on them or keep a few spares on hand.

Pretty solid. Its a straight pololu rip-off, so I kind of feel bad cheaping out on it, but the budget was tight for a school project. I killed a couple (as well as an arduino) trying to drive a stepper over 24 volts, so be careful, and keep it several inches from the microcontroller on your board. If theyre packed together, the pins can arc to the arduino and fry both.

Defected on first installation. VREF is not adjustable.

Prompt delivery, stepper drivers worked as replacements for A4988 drivers with minor software change to accomodate 1/32 stepping.

Excellent product. Was shocked to find out it supports 1/32 stepping. As always, very your voltage before attaching your steppers. Mine were all around 0.6V except one that was at 2+V which could have fried my motor.

Out of five tried three - first bad out of box didnt work, spent 15-20 mins thinking wires are incorrect but it was just faulty one. - second, worked for 30 second, then stopped. but at least this allowed me to figure out correct angle for register - third, worked for a minute then stopped for all heat sink was on with a CPU fan on top of the unit. Input: 12V, 0.78A

I bought a Bigtreetech SKR V1.3 and shortly after I bought these realizing I needed stepper drivers. I was only getting about half this distance for moves after configuring and installing Marlin on the SKR. Turns out when I configured Marlin I had just quickly referenced this page at a glance saw the familiar A4988 in the title, which is the default stepper setup in Marlin. After looking at the page more carefully I changed the stepper drivers to what it should be in the firmware (DRV8825) and this fixed my problem. Hopefully this review can save someone time.

No documentation make sure whatever you are replacing they are going in the correct direction as these are opposite of the ones you might be upgrading.

was pleased with this