KINGPRINT SKR Mini Controller Board for 3D Printer Compatible with 12864LCD / Support A4988 / 8825 / TMC2208 / TMC2100 Driver (DC Plug Power)

Unlike Bigtreetechs other products, this SKR Mini is almost completely abandoned. Marlin 2.0 will not compile for it. You can download a distro from bigtreetechs github, but that will not compile either. Even if you leave it stock, the way they have it listed for download. I spent hours trying to follow guides and update the code but even the community seemed to be reporting the same troubles and that bigtreetech wasn't updating anything. The build quality looks good, but until this has proper support I wouldn't purchase it. Unless you're comfortable effectively rewriting a custom version of Marlin that's already several months out of date, this will be way too much work to be worth the effort.

Multiple purchases. Ditch the included/POS SD card if your display, its encoder, or menu items become unresponsive while printing or if the controller fails to boot from previously flashed boot image...Upgrading to a 32 bit processor is a massive step in the right direction when compared to the typical under-powered 8 bit Arduino (ie: leaning tower of RAMPS or the more convenient single board RAMPS compatible controllers - KFB, MKS, etc.). While the 8 bit solutions struggle to maintain feed rates when any attached stepper motor drivers have micro-step rates of 16 or more the fast 32 bit ARM processor on this board does not.Several of the boards I own use Smoothieware with stepper motor controllers set to 16 or 32 micro steps on a bench top CNC router. They work as well as can be expected running Marlin 2.0 with stepper controllers set to 16 or 32 micro steps on a rotary engraver, small CNC router, and two 3D printers. Marlin developers seem to have overcome previous issues in their migration to 32 bits but everything seems to cut or print better using Smoothieware. I've had no issues using two brands of LCD12864 controllers, didn't have to modify cables, and their onboard SDcard slots are supported.The addition of a SDcard adapter allows the use of full side cards and convenient remote mouting of the adapter for easy access.Update: Awesome prints at 2519.68 steps/mm (32X microstepping) on 1/2-10 ACME with real anti-backlash nuts on all three axis - resolution that isn't possible (at least during prior attempts) with 8 bit controllers.Note: Inputs to analog I/O pins are limited to 3.3 VDC and the digital I/O pins can accept up to 5.0 VDC (but only while the CPU is under power). This becomes an issue if you are using optical or inductive proximity sensors for limit switches/end stops connected to 12-24VDC powering the board. The end stop inputs are digital pins. A level converter would be necessary to interface the high voltage outputs of some devices to the low voltage inputs and can be as simple as a LM7805 5 volt regulator in series between the sensor outputs and end stop inputs. The inductive proximity sensors are more accurate when supplied with higher voltages and any attempts to power them directly from the 5V provided at the end stop inputs will probably not produce the results (accuracy/repeatability) that you expect.