Alfawise U20 Large Scale 2.8 inch Touch Screen DIY 3D Printer


Alfawise U20 is an incredible 3D printer for professionals and amateurs alike. It requires the least effort to set up, so you will be able to finish assembly in just 5 minutes. It boasts high cost-performance ratio - any DIY enthusiast will not be unable to resist. U20 has a large build volume - 300 x 300 x 400mm - designed for big challenges. More importantly, printing with Alfawise U20 is hassle-free because the two resume functions prevent any imperfection and failure due to power outage and filament run-out. Control the process and set parameters on the touchscreen. Enjoy easier and more successful 3D printing!

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Main Features:
300 x 300 x 400mm big build volume to print more exciting models
Precision printing with standard 0.4mm diameter nozzle, accurate alignment, and up to 150mm/s speed
● More successful in 3D printing with filament run-out protectionandpower outage protection
2.8'' full color touchscreen for more intuitive control
Fast and easy assembly, only 5 minutes needed to get started
Reinforced aluminum alloy construction, wear-resistant, and durable
● 100 Deg.C max. heat bed temperature, 250 Deg.C max. nozzle temperature for various filaments, such as PLA, ABS, PVA, PP, TPU, wood filled, etc.

ALFAWISE U20, une imprimante 3D mieux que la CR 10 ?!

Alfawise U20 Art Collection

Alfawise U20 DIY 3D Printer

Alfawise U20 3D Printer Assembly after unboxing

Alfawise U20 3D Printing process

Alfawise U20 3D Printer Factory production


Brand: Alfawise
Type: DIY
Model: U20
Engraving Area: 300 x 300 x 400mm
Frame material: Aluminum Alloy
Nozzle quantity: Single
Nozzle diameter: 0.4mm
Nozzle temperature: Room temperature to 250 degree
Layer thickness: 0.1-0.4mm
Memory card offline print: SD card
LCD Screen: Yes
Print speed: 20 - 150mm / s
Supporting material: ABS,Carbon Fiber,PLA,TPU
Material diameter: 1.75mm
Language: Chinese,English
File format: G-code,STL
XY-axis positioning accuracy: 0.012mm
Z-axis positioning accuracy: 0.004mm
Voltage: 24V
Host computer software: Cura,Repetier-Host
Packing Type: unassembled packing
System support: Windows / Linux / MAC
Connector Type: SD card,USB

How to update the firmware?

The firmware upgrade for this machine is very convenient, if the machine's firmware has a major change that needs to be updated, the manufacturer will provide two files to the user, Users only need to copy these two files to the SD card, and then restart the machine. After the machine progress bar is completed, the firmware is refreshed. Then the user needs to delete the two files in the SD card before the machine is used normally. Otherwise, the firmware will be refreshed each time when started the machine.

How do I know the links to update the firmware? If SD card data is lost, how can we find it?

Please join the Alfawise U10 & U20 3D printer group in Facebook. We will release the latest firmware and the information in the SD card.

What should I do if I cannot resume printing after power shutdown?

If you suddenly lose power when you start printing parts, the machine will not save the print data. Unless we print more than 0.5mm in height, we will support the power outage recovery. If the height is less than 0.5mm, we suggest printing again.

Why the 3D printer always overheating?

Insufficient cooling;

Printing at too high of a temperature;

Printing too fast;

Try printing multiple parts at once.


Why the filament can't stick on the heat bed?

1. Paste high temperature adhesive tape on the heat bed or using 3D print heat bed glue.

2. The distance between the nozzle to heat bed is very important, please keep the distance is about 0.2 - 0.3mm.

Some types of filament need higher temperature of heat bed, usually PLA is 50 - 60 degree, HIPS/ABS/PC is about 80 - 105 degree.

What is the input voltage of Alfawise U20 3D Printer?

110V or 220V, you can switch the input voltage.

Customer Reviews

Based on 11 reviews Write a review


Ask a Question
  • What is the firmware? It doesn't respond to M115, M360, M703, M20, M39, M78, M503, M450, there's no M29 T. Not knowing the firmware type makes it impossible to use A20 with Octoprint properly.

    Our firmware is a self-developed closed-source firmware that is not necessarily compatible with all of Marlin's instructions (partially compatible). As for Octoprint, we have not tested whether it is perfectly compatible.

  • Hello, The printer print gcodes. Please what is the full list of gcodes order known by the printer on sdcard and USB (like G1, G92, M117, ...)

    Please refer to this link: 

  • "Please join the Alfawise U10 & U20 3D printer group in Facebook. We will release the latest firmware and the information in the SD card." What is the official Facebook group of the Alfawise U20? Send me the link please because there is many fake groups.

    The link is :   

  • My touchscreen is not working i have 2.16 firmware plz help me!

    For after-sale problems,please kindly send an email to to solve it. 

  • Do you have a manual other than the quick start guide?

    Please  click here download the user manual.

  • What's the latest firmware version? Where can I get the lastest firmware? Your website and Gearbest link are for the 2.10 but you spoke about 2.16A.

    Please see the firmware link here: 

  • Bonjour, nous avons acheté une imprimante 3D Alfawise U2 pour ce Noêl, elle a très bien marché jusqu'au moment où l'on a mis le Firware ( à jour ce matin. Constatation : Après le calibrage de l'écran au moment de l'installation, celui-ci s'affiche mais n'ai plus tactile. Nous avons changé de carte microSD même probléme. Et même si l'on réinstalle une version antérieure même problème. Que peut on faire ?

    Pour les problèmes après-vente, veuillez envoyer un courrier électronique à pour obtenir la résolution

  • Bonjour, quels sont les nouveautés du derniers firmwares 2.16A ? Merci beaucoup

    Please see the firmware link here:  

  • I upgraded my alfawise u20 with the 2.14 firmware . But now it ask me to "calibrate" the touchscreen with a "clicking and adjusting" procedure. Even if I do it perfectly, it reboot and ask me again. If I dont click, it lauch the firmware but the touchscreen is not working. If I turn it on without the sd card, the touchscreen doesn't work too. I try with 2.12 and 2.10 firmware, it's the same problem. Can you Help me please?

    Please kindly refer to this link to try again:

  • Buonasera, vorrei sapere perché la stampante ha smesso di funzionare (ALFAWISE U-20), cioè: carico il progetto con il programma CURA 3.6, controllo che tutti i parametri siano OK, mando in stampa attraverso USB, estrusore e piano stampa a temperatura, ma …….. si ferma li non si muove per niente. Eppure quando e arrivata ha stampato tutto OK, potrei aver modificato qualche comando senza volerlo, non sono ancora molto pratico. Mi potete aiutare, grazie. PS: mi si è difettata la chiave con la micro SD è possibile averne un'altra, magari anche pagando. In attesa di una Vs risposta porgo distinti saluti

    Per problemi post-vendita, si prega gentilmente di inviare una e-mail a per ottenere la risoluzione.

  • Hi,alfawise support. I need spare parts for my alfawise u20 eu version. Where can i find complete heating block (heating block+Ceramic Cartridge Heater+Thermistor) ? thanks regards

    You can buy the spare parts on our authorized distrubition channel,

  • Bonjour je recherche un plateau chauffant de rechange car celui que j'ai sur la u20 est fissuré

    Please kindly send an email to and tell us the order number and more details about your issues.
    If you can provide the related picture,it will be more appreciated.
    We will try our best to solve it for you.