BIGTREETECH SKR 3 EZ Mainboard Silent Motherboard 48V High Speed Printing Support Marlin &Klipper Firmware Compatible with EZ2209 EZ5160 TMC5160 TMC2209 Driver for 3D Printer DIY Control Board

The SKR3 controller board is quite a bit faster @ 480 MHz "claimed" clock rate than BTT’s previous controller line up. Installation requires a different board enclosure, since the SKR3 EZ hole pattern has changed. I believe the SKR3 non EZ has the same hole patter as before. There are plenty of SKR3 EZ enclosure model on the Internet, essentially ready to print.The controller has some firmware installed, but who knows what it does. So you'll need to compile firmware that matches your printer.* Don't disassemble your existing printer yet, if you have only one, hi, hi. ***********************************************************************************************************************For those that upgraded from a previous version, using sensor-less homing on Y / X axis, *** be aware if you removed the Diagnostics pin (TMC2209) in one or another way, you'll need to reinstall it again. *** Otherwise your sensor-less homing will not work. It requires the diagnostic pin to be connected to the socket. The small jumper, used on the SKR3 EZ, will direct the signal. This is not required with the EZ TMC2209 driver, aside they don' have these pins.*********************************************************************************************************************Other than that, it will work just as your previous setup. Perhaps you may have had the hot-end cooler fan connected to the HE1 header. In this case the fan runs on "board voltage supply". If the DC/DC module is installed, one has now the choice to select 5V or 12V fan supply (buck converter) as supposed to the board voltage. The Hot-End fan can also be moved to one of the fan header (requires modification of firmware). There are now 3 controllable fan header that will get their supply voltage from the DC/DC module (if Installed and setup). I guess this option is useful to original Prusa printer having 5V fans.I have another printer that runs the SKR3EZ board with TMC2209EZ driver, for a while. The only thing, I believe, that has not caught up to these boards, is probably the Marlin Firmware. This printer does on occasion some unexpected stuff (deviating from a certain sequence), but I think it is firmware related. Otherwise it prints flawless!I recommend some form of cooling to the driver, perhaps simply a fan blower at the bottom opening of the board enclosure?

Pay attention to the listing! They show this board has the newer STM32H723 chip on it.If you plan to run Marlin, well Good luck! After a couple of days of recompiles I couldn't get the endstops to work properly, no I did not want to run sensorless homing. BTT's firmware on github is useless for this board as they haven't updated anything in that repo since changing from the H743 chip. So you are out of luck there. As of 7/20/23 a git clone of the 2.1 marlin firmware still had the problem with the endstops.-1 star for all the headache caused above.Now, if you want to run Klipper however this board rocks! It looks like it's been supported since Feb '23 and my endstops worked as expected. I now have dual z axis control and gantry leveling plus a myriad of other features I wanted.The pin out of the board is well document (fortunately that didn't change from the H743 to H723 chips). I'm using the TMC2209EZ drivers because I took advantage of a Prime Day deal.On my next build If I run the TMC2209 drivers, I'd consider getting the SKR3 EZ instead as it doesn't require the riser cards.

Purchased this board to go in my ender 5. Followed all directions and was unable to get a working firmware. Located very minimal references for this particular chip. Most support out there is for the 743 chip, not the 723. Marlin from what I could find is not compatible with 723. It could be, but through my hours of rooting around and following tutorials, 723 isn't in the cards. Followed multiple guides to setup klipper to no avail. Many hours wasted on this board.Edit:I struggled with this board for a few days, there is nearly no support for the board anywhere. After mixing and matching a few different tutorials, I was finally able to get this board up and running. As of right now, the board is running and it is much quieter than the stock 5 Plus board. This was a great learning experience though.

I love big tree Tech. You get a lot of bang for your buck with their products and they're always super easy to install. Granted I feel like they do have some issues with bootloaders and quality control at times but overall their products are great. This board was super easy to set up and I love having the CM4 on the actual main board rather than running a separate Raspberry Pi. I don't know if it just seems faster or if it actually is but I love how this machine is running now.

I upgraded an old 3D Printer with this. TFT screen was a ROYAL PAIN to flash firmware for. Pronterface does not work with this controller. Homing works only if I home X, Y axes manually before EVERY print job!!! Anyway, this board was DOA, but the one I ordered directly from SKR has all the above faults.

I upgraded my Monoprice Maker Select V2 with this board and some TMC2208's. Not recommended for this printer, the stock MSV2 screen isn't directly compatible (get the LCD bundle), the mounting holes don't quite line up, and you need to dremel a hole in the control box for the USB port.Some of the cables needed connectors attached to fit, but this kit does come with the plugs to fit on.Last but not least, the stepper motors are near silent now! No more constant whining. The loudest part of my setup is now the blower fans, and occasionally the print bed axis when it moves fast.

I absolutely love this board in my ender 3 with dual Z motors. Was going to get another and they disappeared without a trace. What happened?? Not sure. I ordered the SKR 2 instead. Hopefully I like that one just as much.

used these on my mercury one.1 build on my ender 5 plus worked great