TwoTrees SK1 review – A CoreXY 3D printer with high printing speeds

TwoTrees SK1 is an FDM 3D printer with a working space of 256 x 256 x 256 mm and a CoreXY system that may print 3 to five occasions quicker than a typical 3D printer. The actions of a CoreXY 3D printer are achieved by transferring two motors concurrently. The TwoTrees SK1 CoreXY 3D printer can print at a most velocity of 700 mm/s and options automated Z-Tilt base leveling with a 36-point mesh mattress. The print head makes use of a dual-gear direct extruder to feed the filament on to the nozzle and the nozzle helps as much as 300 levels Celsius. The printer additionally comes preloaded with the favored Klipper firmware.

TwoTrees SK1 3D printer review

TwoTrees SK1 specs

  • Printing measurement – 256 x 256 x 256 mm
  • Dimensions – 400 x 400 x 530 mm
  • Printing velocity – As much as 700mm/s
  • Acceleration – As much as 20,000 mm/s2
  • Nozzle temperature – As much as 300ºC
  • Information rail sort – Bail screw information rail
  • Show – 4.3-inch touchscreen show
  • Leveling – Z-Tilt included leveling
  • Hotbed panel – PEI
  • Non-obligatory help for Webcam (“AI digicam”)
  • Non-obligatory help for WiFi
  • Klipper Firmware

TwoTress SK1 3D printer unboxing and meeting

The 3D printer ships with a spread of equipment together with instruments similar to a hex screwdriver, chopping pliers, a brass brush, a microSD card, filament, screw nuts, and so forth.

TwoTrees SK1 3D Printer unboxing accessories

Slide Rail and Belt System

The SK1 depends on a linear information rail for each axis (X/Y/Z) that helps high-speed motion. And has been used on this 3D printer. The X and Y axis every characteristic a belt and two stepping motors to maneuver rapidly and precisely of their respective course.

3D Printer Lead Screw
The Z-axis is managed by three lead screws and motors.

TwoTress SK1 3D printer management display screen

A 4.3-inch coloration touchscreen show is hooked up to the highest of the printer.

TwoTrees Display


A dual-gear direct extruder system feeds the filament on to the 0.4mm nozzle which might be heated as much as 300 levels. One fan is used to chill the workpiece, and there’s additionally one other high-powered air flow fan.

TwoTrees SK1 3D Printer Extruder

Inductive sensor on the SK1 3D printer

An inductive sensor is used to verify the gap between the print head and the hotbed for printing accuracy and in addition prevents the print head from colliding with the plate.

inductive sensor 3D printer
Unlocking the axis

With a view to stop harm throughout transportation, every axis of the 3D printer might be locked. So we have to take away the locks earlier than utilizing the machine. We present easy methods to do it within the video embedded on the finish of the assessment.
3D Printer remove Limit Block

110V/230V voltage choice

Earlier than turning on the machine for the primary time, ensure that the right voltage is chosen. There’s a swap to regulate to 110V and 220V on the left facet of the SK1 3D printer.

TwoTrees SK1 3D Printer 110V 230V selection

If the voltage is just not set appropriately, this occurs (110V set when the mains are literally 230V):

The ability provide blew up but it surely may very well be changed by buying a MEANWELL LRS-350-24 energy provide obtainable on Amazon, Aliexpress, and different retailers for underneath $30.

WiFi antenna set up

The WiFi antenna can simply be hooked up to the SMA connector on the facet of the machine utilizing the supplied hex key.

TwoTrees SK1 3D Printer Install WiFi Antenna

Printing plate

A PEI magnetic sheet will ensure that the workpiece sticks firmly in place and doesn’t fall off throughout printing. It may be used with a spread of plastic supplies and is appropriate for printing with small floor areas or workpieces that require a clean backside floor. As soon as the print is completed, the workpiece will come off simply with out having to make use of instruments to take it out.

3D Printer PEI magnetic steel plate

TwoTrees 3D printer filament

Our equipment got here with a 1kg HS-PLA filament spool from TwoTrees that’s supposed to stick higher to the hotbed than customary PLA. The temperature used for printing is between 200 to 230°C and the diameter of the filament is 1.75 mm.

Two Trees Filament Box
The filament spool might be put in within the metal hanger put in on the facet of the SK1 3D printer and secured with two screws.

Two Trees SK1 3D Printer Filament

Making ready the TwoTrees SK1 CoreXY 3D printer


The mainboard comes with 4 ports as follows:

  1. Ethernet EJ45 jack
  2. USB 2.0 port is used to attach a flash Drive or a PC to ship knowledge to the printer
  3. USB 3.0 port is used to attach a flash Drive or a PC to ship knowledge to the printer.
  4. RJ11 connector to attach an extra show

Two Trees SK1 3D Printer Mainboard Interface

TwoTress SK1 consumer interface

The Dwelling web page shows the temperature of the nozzle and hotbed, in addition to the WiFi connection standing.

Two Trees SK1 3D Printer Home display

It may also be used to regulate the LED strip included with the printer…

Two Trees SK1 3D Printer LED Light
… by tapping the sunshine icon on the underside left (White: off; yellow: on).

Two Trees SK1 3D Printer Open LED Light
Tapping the nozzle icon permits the consumer to set the temperature of the nozzle by coming into the required worth between 0 and 300°C.

Two Trees SK1 3D Printer Adjust Nozzel Temperature
We are able to do the identical for the heated mattress between 0 and 100°C.

Two Trees SK1 3D Printer Adjust Bed Temperature
The second merchandise within the backside bar enters the Transfer/Temp mode permitting the consumer to manually management the motor X/Y/Z and set the default motion distance increment to be 1mm, 10mm, or 30mm. It’s additionally attainable to regulate the temperature and/or cease all motors on this window.

Two Trees SK1 3D Printer MoveTemp Function
The fan mode gives choices to independently management the mannequin, auxiliary, and case followers from 0% (off) to 100% (full velocity).

Two Trees SK1 3D Printer Setting Fan Speed
Tapping the gear icon within the backside bar enters the System menu to set display screen brightness, robotically off the show after a time frame, choose the language, and carry out a self-test.

Two Trees SK1 3D Printer Setting System
This menu may also be used to configure the community (WiFi or Ethernet) to entry the 3D printer through the web-based consumer interface supplied by Klipper.

Two Trees SK1 3D Printer Setting Network

Leveling the mattress of the SK1 CoreXY 3D printer

The identical menu can be utilized to stage the printing mattress because the SK1 3D printer has a operate for robotically calculating the lean of the print mattress by probing 36 factors on the mattress and guaranteeing the plate as completely horizontal as attainable regardless that the chassis of the printer might not be. The calibration step is showcased within the video on the finish of this text.

Two Trees SK1 3D Printer Auto Bed Calibration
Printing head peak calibration

The peak of the printing head of the SK1 3D printer additionally must be calibrated. We are able to do that manually by adjusting the peak within the consumer interface and as soon as we get the right worth we will faucet on the OK button.

Two Trees SK1 3D Printer Probe Calibrate

How can we decide the right Z worth? By utilizing an A4 sheet of paper as we did in our Creality Ender-3 S1 Professional 3D printer assessment. We should regulate the peak of the nozzle by ensuring it touches the paper however nonetheless permits us to maneuver it with some friction.

3D Printer Probe Calibrate Paper Test Z Axis

Loading/unloading the filament

We have to insert the filament into the nylon tube that comes with the 3D printer and push it in so far as it’ll go.

Two Trees SK1 3D Printer Load Filament
As soon as that is completed, we will go to the Load/Unload part of the consumer interface and faucet on the “Load” button with the specified temperature. The 3D printer will then deal with this for us robotically.

Flipper 3D Printer Load Unload Function

Utilizing the PuraSlicer program with the TwoTress SK1 3D printer

PuraSlider set up and SK1 configuration

3D fashions have to be transformed into G-Code earlier than printing. That is completed by a slicer program, and we are going to use the PrusaSlicer program (model supplied by TwoTrees) on this assessment.


The very first thing to do is to import a configuration file for the 3D printer via File >>> Import >>> Import Config Bundle within the prime menu.

PrusaSlider Import Config Bundle

Choose the file named PrusaSlicer_config_bundle.ini then click on “Open”.  You’ll discover the file on the microSD card supplied with the 3D printer or on MediaFire.

Config PrusaSlicer

The SK1 3D printer is efficiently configured within the PrusaSlicer program.

TwoTrees SK1 3D Printer Finish Add Printer to PrusaSlicer
Changing 3D information to G-Code

We are able to now import a 3D mannequin file by clicking on the Add icon as proven within the screenshot under.

PrusaSlicer Add File Model 3D
Choose the 3D mannequin file with extension STL, 3MF, STEP, OBJ, AMF, or PRUSA, then click on on “Open”. We chosen “EiffelTower.stl” for our check.

Open File Eiffel Tower STL sample

PrusaSlicer will then show a 3D illustration of the mannequin on the printing plate.

We are able to set the print decision to be 0.08, 0.12, 0.16, 0.20, 0.24, or 0.28mm which is able to impression the standard of the pattern and printing time.

PrusaSlicer Setting Layer

As soon as that is completed, we will click on on “Slice now” to start processing the file.

PrusaSlicer Slice Model with PrusaSlicer
This system may even calculate the printing time and quantity of fabric required. We are able to then obtain the G-Code file to a pc or put it in a USB flash Drive by clicking on “Export G-Code” to finish the file conversion course of.

PrusaSlicer Export G Code

Klipper firmware net interface (Fluidd)

We are able to log in to the Klipper dashboard (Fluidd) after connecting the 3D printer to a WiFi community and utilizing the IP handle proven on the show.

Two Trees SK1 3D Printer Klipper Firmware
Importing G-Code to the SK1 3D printer over WiFi (or Ethernet).

Let’s go to the Jobs part by clicking on the related icon on the left banner after which clicking on the + signal so as to add a brand new job.

Upload Gcode to Klipper

Choose the .gcode file we’ve got simply exported (EiffelTower.gcode), then click on on the “Add” button.

Two Trees SK1 3D Printer Choose Gcode to upload

The file might be uploaded to the 3D printer, and after that, you may choose it and print the workpiece.

Uploading File to Klipper

Choosing a G-Code file from a microSD card or USB drive

Alternatively, the TwoTress SK1 3D printer may print 3D elements from a microSD card or a USB flash drive via the touchscreen show by going to the USB mode of the consumer interface.

TwoTrees SK1 3D Printer USB Data

Printing samples with the TwoTrees SK1 CoreXY 3D printer

Eiffel Tower mannequin

Materials: PLA; layer: 0.28 mm; infill: 15%; velocity: 200 mm/s; journey: 500 mm/s

TwoTrees SK1 CoreXY 3D Printer sample Eiffel Tower

Print time: 3 hours 10 minutes

Calibration dice with totally different resolutions

An XYZ 20mm calibration dice was printed with the next parameters – materials: PLA; layer: 0.08 to 0.28 mm; infill: 20%; velocity: 200 mm/s; journey: 700 mm/s

TwoTrees SK1 3D Printer Layer Test Print Resolutions

A visible inspection doesn’t reveal any apparent variations between totally different layer thicknesses.

Benchy mannequin printed at most velocity

We additionally printed a Benchy at most velocity (700mm/s).

Materials: PLA; layer: 0.20 mm; infill: 25%; velocity: 700 mm/s; journey: 700 mm/s

Benchy high speed printing CoreXY 3D printer

Print time: 18 minutes.

The ensuing print is just not too dangerous and far quicker than Karl’s velocity printing experiment with the Longer LK5 Professional 3D printer the place he might print the Benchy in 37 minutes after some optimization and a few “dishonest” (0.3mm thickness), whereas his 0.2mm print would take properly over 45 minutes. So CoreXY 3D printers clearly have the higher hand in the case of velocity printing with out sacrificing the standard an excessive amount of if in any respect.

Versatile dragon mannequin

Materials: PLA; layer: 0.28 mm; infill: 15%; velocity: 300 mm/s; journey: 700 mm/s

TwoTrees SK1 CoreXY 3D Printer Flexible Dragon sample

Print time: 3 hours 32 minutes.

Lion mannequin

Materials: PLA; layer: 0.20 mm; infill: 15%; velocity: 400 mm/s; journey: 700 mm/s

TwoTrees SK1 CoreXY 3D Printer Lion sample

Print time: 2 hours 11 minutes

Video assessment of the TwoTrees SK1 CoreXY 3D printer


The TwoTrees SK1 3D printer works properly and permits spectacular speeds due to its CoreXY design that allows speeds as much as 700mms which are a number of occasions quicker than conventional FDM 3D printer, however for example, a Benchy may very well be printed in 18 minutes utilizing a 0.2mm layer.

The Z-Tilt auto-calibration characteristic is handy to make use of and lowers the danger of points throughout printing. The SK1 3D printer has an excellent construct high quality with a stable construction that helps the motion of the X/Y axis. The Klipper firmware additionally helps with delivering good high quality prints and a well-known consumer interface enabling the add of G-Code information over WiFi. The 3D printer is appropriate for small companies, fanatics, and even the classroom.

We wish to thank TwoTrees for sending us the SK1 CoreXY 3D printer for assessment. The 3D printer might be bought for $499 on TwoTrees’ on-line retailer, on Aliexpress, they usually even have an Amazon retailer, however the printer is just not listed there simply but.

CNXSoft: This text is a translation – with some extra insights – of the assessment on CNX Software program Thailand by Kajornsak Janjam, edited by Suthinee Kerdkaew.

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