Bigtreetech Skr V 1.3 Installing Firmware Videos

Bigtreetech Skr V 1.3 Installing Firmware Videos

One of my commencement Ender 3 (review) upgrades, was the jump to a BigTreeTech (v1.2) board, for i particular reason: stepper motor whine. It’southward fine if y’all have a dedicated room to run your 6h prints, just as both printers are sabbatum next to me, I wanted to keep the noise level downwardly to a minimum.
BigTreeTech SKR Mini E3 V3.0
offers silent performance every bit default and brings more upgrading options than ane could ever imagine.

Making your 3D printer awesome and upgradable

Bigtreetech Skr V 1.3 Installing Firmware Videos
BigTreeTech SKR Mini E3 V3.0

Information technology’southward fair to say, that 3D printing is entering the same phase, the PC was about 10 years ago. Online communities are filled with DIY mods, upgrades and improvements that you tin often 3D impress to brand your printer even amend. We intendance not merely virtually the consistency and the quality of our prints but well-nigh how machines look!

Simply in the same way gamers intendance about their kit and the upgradability of their hardware. Futurity-proofing through hardware upgrades is what many of us expect at when selecting components for our upkeep 3D printers. Cipher reflects this trend meliorate than the latest motherboard for Ender 3 printers: BigTreeTech SKR Mini E3 V3.0. It brings bold looks and serious upgrade capabilities.

Sporting a gamer’s artful, BigTreeTech SKR Mini E3 V3.0 looks like something y’all’d find within a gaming rig rather than a 3D printer. Don’t be fooled by the product picture, the lath still takes a fraction of the space that regular PC boards take and it’south a direct replacement for Ender 3 and Ender three v2 motherboards.

The bulky heating roofing TMCM2209 silent stepper drivers is merely ane of the middle candy. A dedicated Neopixel header brings the magic of the RGBs to, no doubtfulness, speed upwards your printing. While one tin can laugh most “everything RGB”, 3D press is a passion, and people care about their tools equally much equally the event of their work.

Every bit BigTreeTech SKR Mini E3 V3.0 isn’t just about the eye candy, it brings the features that you could discover on the TOP10 well-nigh pop 3D printing upgrades. The motherboard supports:

  • Dual Z steppers (for linear rail and belt upgrades)
  • Native BL Touch on support
  • TFT touchscreen display support
  • 3 PWM controlled fans
  • filement runout support
  • Automatic shutdown (UPS back up)
  • ability-off resume
  • Sensorless homing
  • NeoPixel support (up to 30 RGB LEDs via DCDC5V module)
  • onboard EPROM (that works)

The list actually goes on, which brings more than advanced features like a dedicated GPIO header with SPI communication, and USB ability cut off – which is great for enabling the lath for firmware testing directly from the computer or preventing Octoprint from keeping the board powered on.

One of the biggest limitations of this series is back up for single extruder/hotend printers. If you are trying to change your printer into a dual printhead setup, yous best look elsewhere – like this
BIGTREETECH Octopus Pro V1.0
with support for viii stepper motors and iv hotends.

BigTreeTech SKR Mini E3 V3.0 comes with a class gene compatible with Ender 3 series Ender 5 and CR-10. Swapping the lath is pretty simple, but bear in mind that if you have upgrades installed, y’all may need to re-compile the firmware again to fit your needs. I have a guide to help you with that.

Should you purchase it?

The situation has changed a scrap since I got my original Ender 3. While these are still bachelor online, often at much-discounted prices, Ender 3 v2 took the lead and offers some of the features that BIGTREETECH SKR MINI E3 V3.0 comes with by standard, including silent steppers.

It ways that the determination to buy a new board (unless you accept a specific upgrade path in mind) is not as unproblematic. Having said that, I have both Ender 3 printers, I can offer some constructive purchasing advice.

Original Ender 3 owners – YES!

Ender iii with BigTreeTech SKR Mini E3 V3.0 and TFT, BLTouch, Octoprint and geared extruder

If you just caused the original Ender 3 or it’due south been on your shelf forever, you lot should consider treating your board to a fancy new BigTreeTech SKR Mini E3 V3.0. First of all, it will brand your 3D press experience much quieter which is alone an upgrade worth having. Information technology will also enable a very flexible upgrade path to your Ender 3 printer adding features present in more than mod designs.

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As the original Ender 3 can be purchased for as picayune as
£130 on Banggood
(during sale times), it leaves yous plenty spare change in your wallet to become the latest motherboards from BigTreeTech and still stop upwards with a smaller bill than purchasing a brand new Ender 3 v2.

Getting a new lath won’t make your prints any better, just information technology will offer a much quieter printing environment and enables back up for upgrades like bear on screen, filament runout, or piece of cake BLTOUCH installation.

Ender 3 v2 owners: MAYBE?

Water-cooled Ender 3 v2 with BigTreeTech SKR Mini E3 V3.0, BLTouch, H2O hotend/extruder

I can’t blame anyone with an
Ender 3 v2
(review) sticking with their default motherboard, simply if you are planning some cool upgrades, paying $49.99 USD for BigTreeTech SKR Mini E3 V3.0 might exist the best upgrade you could become.

It opens up opportunities to add a belt-driven Z-axis with dual motors, add various LED displays and control the speed of iii fans for ideal cooling profiles for each situation. If you are into modding (and that’south a hobby on its own) then BigTreeTech SKR Mini E3 V3.0 makes perfect sense.

Is it quieter in operation than Ender 3 v2’s four.2.2 board? Possible, but not in the way yous’d notice immediately. While single-centrality movement on both printers is silent, BigTreeTech SKR Mini E3 V3.0 offers better control over cooling fans and owners may do good from a bit less noisy setup.

Unfortunately, the BigTreeTech SKR Mini E3 V3.0 isn’t uniform (past default) with Ender’south 3 v2 brandish, so you will either have to spend more than on
BTT TFT three.5″ touch display
(recommended) or make a
custom ribbon cable
to enable the screen. I used the board in my
silent 3D printing project, which turned out to be a huge success.

Purchase it, if you know that your upgrades volition take you beyond the Creality’s 4.two.2 – otherwise, your money would be amend spent on a Raspberry Pi with
or a new extruder.

Getting started with BigTreeTech SKR Mini E3 V3.0

Don’t be agape, the procedure of upgrading is relatively straightforward. Most of the fourth dimension, yous will exist reading the designations on the board itself, and plugging the corresponding cables into sockets. The only thing to acquit in heed – is the polarity of the wires that connect the screw-in terminals. BigTreeTech SKR Mini E3 is compatible with 12V & 24V power supplies and the voltage connected to the board will determine the voltage available on the DC pins.

If this is not your last upgrade, exercise yourself a fav and invest in a
JST connector kit
(with a crimper) that comes in handy, if your hotend fan has been previously connected to a spiral-in terminal.

A couple of tips to get started:

Component Observe polarity Polarity doesn’t matter
DC ability connector
X,Y,Z limit switches
Hotend and bed thermal probes
Fans will spin in an opposite direction
Heated bed, Heated hotend Unless your part transmission specifies otherwise
Stepper motors

Power, hotbed and hotends

power, hotend, hotbed on BigTreeTech SKR Mini E3 V3.0
DC-in, Hotbed and Hotend ability

Information technology goes without saying, discover polarity or damage your equipment. Tripple bank check the polarity of your 12/24 ability supply when connecting the board and recall if you use a 12V power supply, your voltage is nowadays on reference pins for hotend, bed, fans, and VIN. If you apply a 12V PSU to ability your lath, you will have to use 12V compatible parts.

HB (hotbed) and E0 (hotend) are tolerant to the polarity changes unless your part’s transmission states otherwise.

Thermal probes

thermistors on BigTreeTech SKR Mini E3 V3.0
Thermistors for hotend and hotbed

Every bit thermal probes are merely resistors, they don’t care about polarity. Plus almost of them come terminated with a JST connector so you can’t get things wrong equally long every bit you utilize THB for bed thermistor and TH0 for hotend thermistor. Depending on the probe, information technology may demand an extension cablevision to reach your board and leave plenty of slack.

If you are changing thermistor, which is mutual with an upgrade to all-metal hotend, you will have to calibrate and re-melody PID in Marlin. I recently upgraded my hotend – and then I accept a nice
set of instructions
for you. But retrieve, apart from Marlin changes, you volition need a compatible
thermal cartridge
capable of these temps and
high-temperature thermistor.

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stepper drivers on BigTreeTech SKR Mini E3 V3.0
You can bulldoze upwardly to v steppers with BigTreeTech SKR Mini E3 V3.0

The large and fancy heatsink obscures the PCB labels for the private axis. You may exist dislocated at kickoff why you have 5 connectors for the three axis and the extruder stepper. BigTreeTech SKR Mini E3 V3.0 comes with a dual Z axis option (ZAM ZBM) which you tin can have advantage of if you lot desire to add linear slides and chugalug-driven, dual stepper Z-axis upgrade.

If you lot are going with a traditional setup, use ZAM to connect your Z-axis stepper. All steppers use JXT connectors, so other than mixing upward the axis, there is petty room for fault.

Octoprint/Klipper lovers

enable USB power on BigTreeTech SKR Mini E3 V3.0

SW_USB jumper allows you to enable/disable USB port power lines. When the jumper isn’t present, the board will receive no power via USB. If yous want to power your board to tinker over USB, add the jumper to power up your board.

This is especially handy if y’all are running Octoprint or Klipper. I don’t accept to tell you how annoying is to have the lath powered on considering of the USB connexion. To apply Octoprint/Kliper, you lot only need the data lines enabled.


BLTOUCH on BigTreeTech SKR Mini E3 V3.0
BLTouch connection for 5 pin and 3+2 pivot probes

It’due south one of the best upgrades for beginners. I covered the process of enabling the probe in Marlin firmware in item, so check out
this article. On BigTreeTech SKR Mini E3 V3.0 you tin add both versions of the
(5-pin and three+ii-pin) using the schematics on the picture.

Comport in listen, that some of these probes (check manual) are three.3V and some are 5V tolerant. Yous tin define the voltage in the Marlin configuration. In my 3+two version of the BLTOUCH the wires are color coded: (blue: GND, ruby: PWR, yellow: PA1). Since I already have a JST crimp kit, I simply re-wired the connector from a 3-pin to a 5 pin JST in a correct orientation so I never brand the fault of connecting it another style around.

Z-stops and sensorless homing

zstop and sensorless homing on BigTreeTech SKR Mini E3 V3.0
Finish stops and sensorless homing

In improver to pretty straightforward sensor homing, which requires yous to pay attention to your cable labelling and observe the PCB prints to figure out the correct installation, BigTreeTech SKR Mini E3 V3.0 offers sensorless homing.

Sensorless homing uses TMC22009 stall detection to define the abode position. It’south a quick and slightly dirty technique, but there are some employ cases that may mandate that. Some of united states of america would accept the slight decrease in positional accuracy (it won’t impact your print, only its initial location) over routing the extra set of wires (iv strands to be precise). I definitely encourage precise homing for Z-centrality.

If you are just getting started, exit it be, but if you desire to try sensorless homing, remove the limit switches, disconnect the sensor cables and add a jumper across X -DIAG for each axis y’all wish to enable sensorless homing for. What’southward interesting, the sensorless jumper is likewise bachelor for extruders (E0-DIAG).


Touch screen on BigTreeTech SKR Mini E3 V3.0
This is where you connect the TFT touchscreen

If you already use Octoprint, I tin empathize why you won’t care as much about a touch-enabled display. On my original Ender 3, one of the kickoff upgrades was the
BTT TFT 3.5″ V3.0 display
– to speed up pretty much everything. The screen that the printer comes with is hard to piece of work with and the situation isn’t much better with Ender three v2.

If you desire a highly customisable touchscreen, you have to connect it with the TFT socket (for affect display style). You can apply these screens in non-bear on way (why would you practice this?) and connect these to the familiar eight pin connector (EXP1) or have both connected at the same time.


PWM fans on BigTreeTech SKR Mini E3 V3.0
3 PWM controlled fans

You have iii PWM controlled cooling fans for your disposal: FAN0, FAN1, FAN2. By default, these are assigned by the firmware:

Default Marlin config
FAN0 PC6 Cooling part fan
Extruder fan / controlled by Marlin
FAN2 PB15 Enclosure fan / controlled past Marlin

Connect these as above to go the stock functionality. If yous want to adjust the automatic settings of the fan, you lot can practice and then in the Marlin configuration:

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How to power Neopixels on BigTreeTech SKR Mini E3 V3.0
How to power Neopixels on BigTreeTech SKR Mini E3 V3.0

The header (5V) is already available on the board, just the 5V rails doesn’t have enough juice to drive a proper strip. You have two options:

  • purchase 24V DCDC 5V span for about
  • power the strip separately

The bridge will fuse the DCin (in my example 24V) and catechumen that to a 5V ability supply able to light up 30 LEDs. Alternatively, y’all can use another 5V power supply and fuse the GND pins from the SKR board and ability supply. Ready NeoPWR1 jumper to the right if you are using DC span or applying 5V directly to the power pins.

RGB isn’t enabled by the stock firmware, and so you will need to brand your own changes in Marlin.

Filament runout

filament runout on BigTreeTech SKR Mini E3 V3.0
Filament runout detection

One of the fun things to do, is to add a
filament runout sensor. Whether you want to make ane yourself (like me) or get a consumer ane – that’south down to you – they both works in the aforementioned mode and detect when the filament is finished or cleaved.

Instead of breaking your print, the printer stops, retracts the filament and helps you with the filament change so you lot can continue where y’all left off. It works pretty well equally long as y’all don’t let the impress absurd down too much.

If you add a filament sensor, you lot will demand to compile Marlin again with the settings advisable for your sensor. Delight remember that some filament sensors may operate in Normally Open up (NO) and others with Normally Closed (NC) states. Marlin lets you define the default behaviour.

Power cutoff detection & UPS back up

I’thousand lucky to alive in the UK where power disruptions are rare. Despite my Ender 3 v2 coming with a resume on power loss role, I never got to test it. BigTreeTech SKR Mini E3 V3.0 brings support for that every bit well.

Thanks to the relay module and the motherboard UPS, you tin can monitor the ability input and shut down the printer safely to prevent the damage and to resume the print later. Note that provided UPS module, won’t let you continue press, but information technology has enough juice to trigger the safe shutdown & buffer very brief power interruptions.

Other interfaces

Other connectors on BigTreeTech SKR Mini E3 V3.0
Other connectors on BigTreeTech SKR Mini E3 V3.0

If yous are really into modding, and feeling comfortable with Marlin, BigTreeTech SKR Mini E3 V3.0 has GPIO pins that you lot can take advantage of. These utilise SPI interfaces to connect to other hardware accessories.

  • I/O (PD0, PD2, PD3, PD4, PD5)
  • SWD (iii,3V, SWDIO, GNC, SWCLK, RST)
  • SPI1 (5V, GND, NSS, CLK, MOSI, MISO, three.3V, GND)

Since I don’t have the slightest clue how else you could utilize it, I will get out you to practice your own inquiry.


I had some issues flashing a new firmware at first. The procedure that worked well for me was as follows:

  • Format microSD to FAT32 512byte (allocation unit size)
  • copy firmware file names as
  • put the menu into the printer and plough information technology on

The wink volition complete in about ten seconds after showing you a bluish screen. Note that if you are like me, and employ a TFT Touch Display, your screen will kick equally normal, but show that the printer isn’t connected.

Resetting the board via the RESET button on the motherboard and waiting a minute, while the card with the firmware was inside, solved it for me.

Other upgrades

It’s not the simply upgrade that my printers are currently running. It’south worth looking at the other products from BIQU like:

Last thoughts

It’s a great little lath for whatsoever Ender3 possessor and Ender three v2 owners with big upgrade plans. I will use this board in my upcoming
water-cooled 3D printer
build and then examine if I could utilise it to make a
completely silent 3D printer. If yous similar what yous run into so far, then head over to the BIQU store and care for yourself to a couple of nice upgrades, starting up with the
BigTreeTech SKR Mini E3 V3.0. Got questions? Permit me know in this
Reddit thread.

🆓📈💵 – See the
transparency annotation
for details.

Bigtreetech Skr V 1.3 Installing Firmware Videos

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