Connect the 3D printer to PC – 2 easy steps

One of the biggest difficulties you may encounter in the early stages of 3D printing is certainly how to connect the 3D printer to your PC.
This step is essential to go to make many adjustments. Adjusting the PID, the amount of extruded filament and many more.
In this guide we will guide you step by step in this operation, very simple, but connect the 3d printer to pc hides some pitfalls.


In this phase, all the necessary programs must be installed. This can be  translated into 2 programs:

  • Arduino: This software is used to allow the PC to communicate with the electronic board of our printer. In most cases it is also used to allow the PC to recognize the printer. This program has inside the drivers necessary for the recognition of the card.   Download ARDUINO IDE
  • Repetier Host: Famous dialogue program. Downloadable for free from official website!                           Download here

Connect the 3D printer to PC: Arduino One Installation

Let’s start with the download. You can download it on the official website, and under Arduino IDE on the right we find the installer of our operating system. I chose Windows Installer. We are asked if we want to contribute with an offer. You can choose different cuts in dollars or simply download with the Just Download button.
We save and install the software. It is important not to deselect the USB driver installation. They are the ones who materially need the connection to be successful. Now the important operations.


Let’s connect the 3D printer to the PC physically with the USB cable before continuing

  • We select tools —> Tab: —> and we go to select the card that equips our printer (The Chinese use the Mega 2560 probably)
  • Secondly, always on tools we select com: if there were no problems you will see a different number. Select it.
  • If there have been problems in installing the drivers, it may be useful to change the USB plug on your PC. Inserting the card in a new socket will restart the installation of the drivers and in all probability now you will see the number. These numbers are progressive based on how many devices you have connected to the PC through the COM ports.
    In all likelihood you will have to add some library, but this step can be done in the future.

Connect the 3D printer to PC: Repetier Host Installation

connect the 3d printer
If you are looking for a high-performance and low-cost PC CLICK ON THE PHOTO

You can download Repetier on the official website, or through the review you find on the Blog.
Also here all the writings lead to a donation, sacrosanct for the work that this software does. Even if at the bottom of the page we find the button Download without donating.

Here we choose our operating system and start the download. The software can be installed without difficulty. (Don’t be afraid if a DOS screen appears, it is the installation of the program.
The only thing to pay attention to is, if you want the free version, after the DOS screen you will be asked if you want to install Repetier Server. I have never continued because the Host version is the one we need. The installation of the Server version is likely to become paid or it could start a non-repeatable trial period. I leave to the most fearless the faculty to try. Tell us in the comments what happens when you pass that limit!

Now you can press on connect in the upper left corner. It will give you an error but will open the configurations page.

You can also get there from configurations —> Printer settings.

Now you have to set the right port com, to be clear the one already detected on arduino (in my case the com3). And you have to set the Baud Rate.
This represents how much data is transmitted in a second and is a preset value with respect to the card.
Chinese printers in kits, for example, use Baud Rate 250,000 (almost all), or even 115,200 (Creality and few others).
We can set Automatic Detection as the transfer protocol.

Click on Apply and then again on Connect.

Congratulations! Your printer is now connected to your PC!


From now on we can move the engines of the printer, but remember to turn it on! Remember also that you must be at more than 170° of hotend to move the extruder motor, don’t be alarmed if it doesn’t work. You can undertake the adjustment of the PID, the amount of extruded filament and more generally we can give orders in Gcode language to the printer!

connect the 3d printer
If you are looking for a high-performance and low-cost PC CLICK ON THE PHOTO

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