BIGTREETECH SKR 2 Control Board for 3D Printer New Upgrade Silent Board Based on SKR V1.4 Turbo Motherboard for BIQU B1 Compitable TMC2209/2208, DRV8825 Support TFT Display, LCD, (with 5pcs TMC2209)

this is good and bad. the bad is so infrequent, its just murphy you know... I had a fan wire short. it the motherboard completely died. I used that new AI "devin" to help with testing. after all the steps it had me to through "the fan pin that got shorted feed a voltage into the MOSFET and shorted it. "A FAN PIN SHORT" kills it dead!!!!!!!!!! I still give it a 5 as it awesome and works with OCTOPRINT yahooooo go figure

This board is truly amazing. Any feature you can think of can be enabled in the Marlin firmware on this board and it just keeps chugging along! You get SIX motor outputs allowing dual Z axis lead screws as well as dual extruders at the same time! (Though do note that a dual Z setup still uses a single driver. If you want to use auto leveling using Marlin's G34 command you're going to have to sacrifice one of the extruder drivers and outputs and repurpose it for a dedicated second Z motor) There are also tons of fan outputs: I believe there are four in total, two of which are PWM enabled so you can control their speeds. The included TMC2209 drivers are also really useful, allowing sensorless homing and TMC diagnostics while printing. All of the outputs on the board are JST connectors instead of the typical DuPont style, so there's no need to worry that your connections are going to "falling out" after installation. One thing to note on this board is that the integrated MOSFETs for heating the hotend and the bed are only rated for 10A and I suspect this is one of the main reasons that some of the reviewers here have had their boards blown after a short time. I would strongly recommend using external MOSFET modules for these two critical areas, even if your bed only draws about 9A of current. I've also seen people complain online about an issue with the Z endstop pins, but I didn't face any issues when I installed mine. Everything just seemed to work. Unless I've been very fortunate, I've had no issues at all with this board and would love to get another one for my other printer. As long as you take your time and know what you're doing, you won't have any issues with these boards.

I'll get one thing out of the way right now: if you are NOT an advanced user with experience editing Arduino code (or similar), this is NOT the kit for you. It does not come with an up to date version of Marlin, so you're best served by downloading Marlin 2.x straight from Github and making the required configuration to the firmware yourself. A number of users have done this and posted instructions, so I will no go into details on that here. However, once you have the firmware configured and installed, this is an amazing board. The CPU is fast and produces very smooth and clean prints, there is ample memory for the most advanced Marlin configurations, and the TMC2209 drivers are extremely quiet. With this board, you can enable all of the advanced features such as sensorless homing, BLtouch/bed leveling sensors, power loss recovery (with accessory), linear advance, and many more. This is a board for an experienced 3d printer operator who isn't afraid of getting deep into the firmware to make changes. You will need to have a good understanding of Marlin to make this work well for you; copying someone else's configuration is not likely going to give you good results unless all of your parts and upgrades are exactly the same. It's absolutely worth the time-investment to learn; my prints have never been cleaner.

Having used several BTT boards, creality and smoothie, i've experienced a handful of "faulty" boards but this one takes the cake, use an skr e3 v3 for my ender3 and it works brilliantly, figured this was a nice step up from that to have 6 lines from 4 with 5 dedicated... 4 fan headers up from 3 (and originally 2!) was bonus, drivers were swappable, what could't be great about it! EVERYTHING. Bent contacts on teh drivers, they also expect you to decide right then and there with only a difficult repair to undo if you want UART sensor less end stops because you have to cut the pin if you don't in marlin, luckily i use Klipper and Klipper doesn't care if it's present, it just ignores it if it isn't being used. after dozens of back and forths and trials with marlin too got firmware working and loaded and firmly at 115200 baud on any of the measly 3 options of serial addresses to access... skr e3 v3 has 5 uart+usb and 4 alternate contact points you can use depending on what you have hooked up... but doesn't matter, senseless fails like a hot mess, ends top signals don't work at all well either as little scorch marks appear across the board as they burn out. random faults and errors, swapped power supply and monitored voltages and all steady but then you watch this thing do PWM and boy does it radically fly around as it does so... clearly the main controller was the source of the primary defect as voltages on the 3.3 and 5v lines fling around Wildy until this afternoon when "what's that smell" as you turn and see the motors coming to a hyper slow standstill as smoke starts pouring from under the drivers and then POP something short circuited big time internally as a couple little arcs lit up across the board and scorched this sucker to death... now I'm no stranger to circuits or loads... and this thing was not heating the bed or hot end... it was calibrating.. after sitting off idling and failing to heat the hotend twice getting halfway to temp before stalling.... and now i know why... but go onto amazon to return it and... oh not eligible for returns... cool... thanks for the $110 down the toilet... going to have to re-examine how great the e3v3 is but looking at the horror story hits vs misses I'm thinking my first buy was largely fluke.

The first one arrived dead, and I had a good long time trying to debug i, just to realize that nothing was happening as I was trying to flash it. The second one I got worked --- it was a huge pain to set up and configure, but the end result is great. The steppers run so much quieter now, compared to being driven with my old drivers, I can't go back to A4988s now. I definitely recommend this board, now that it's up and running I love it.