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8. Preflight check

8. Preflight check
Relevant for:
Last updated 5 months ago
8. Preflight check
 Difficulty
Easy
 Steps
15
 Available languages
CSPLDEESITFRJA
3D Printing Handbook
3D Printing Handbook
To make this chapter easier to follow, refer to the 3D Printing Handbook included in your kit which is in English only. Or visit our latest online version in other languages.
The latest version is always available at help.prusa3d.com
The handbook contains more detailed descriptions of the important procedures in this chapter and other very useful things for future printing.
Read the Disclaimer and Safety instructions chapters.
Attaching the steel sheet
Attaching the steel sheet
Make sure there is nothing on the heatbed. The heatbed must be clean. Any dirt can damage the surface of both the heatbed and the steel sheet.
Attach the sheet by first aligning the rear cutout with the locking pins on the back of the heated bed (marked in orange in the picture above). Hold the sheet by the front two corners and slowly lay it down onto the heated bed - watch your fingers!
Keep the steel sheet clean for optimum performance.
#1 cause of prints detaching from the print surface is a greasy steel sheet. Use IPA (Isopropyl alcohol) to degrease it if you have touched its surface before.
Firmware update (part 1)
Firmware update (part 1)
Firmware update (part 1)
All shipped kit units have the latest firmware version. However, it is recommended to check and possibly update it.
Visit the help.prusa3D.com page.
From the list of printers on the page, select MK3.5.
Save the latest firmware file (.bbf) onto the bundled USB drive.
Firmware update (part 2)
Firmware update (part 2)
Firmware update (part 2)
Firmware update (part 2)
Insert the USB drive with the latest firmware file into the printer.
Connect the power cable and connect the printer into a wall outlet.
Turn the printer on using the switch on the back.
If the "New firmware available" screen appears, hit FLASH by pressing the rotary knob to upgrade to the latest firmware.
If no such message appears, the printer is running the latest firmware already. Proceed to the next step.
Wizard - Selftest start
Wizard - Selftest start

After the printer starts up, the setup wizard will show up - requiring a self-test. Select CONTINUE to start. 

The wizard will test all important components of the printer. The whole process takes a few minutes. Some parts of the wizard require direct user interaction. Follow the instruction on the screen.
NOTE: While testing the axes, make sure that there is nothing in the printer obstructing the axes movement.
WARNING: Do not touch the printer during the self-test unless prompted! Some parts of the printer may be HOT and moving at high speed.
The wizard starts with the fan check, Z-axis alignment and the X&Y axis test; all fully automatic.
Wizard - First layer calibration
Wizard - First layer calibration
Wizard - First layer calibration
In this part of the wizard, we will adjust the height of the first layer. Place the filament spool on the spool holder. We recommend brightly colored PLA or PETG for easier printing and better visibility.
Insert the filament into the extruder and select LOAD.
Wizard - First layer calibration
Wizard - First layer calibration
Wizard - First layer calibration
Wizard - First layer calibration
As the extruder begins to extrude filament from the nozzle, turn the knob until you reach the ideal gap between the nozzle and the printing plate - that is, the perfect first layer.
Read more about the perfect first layer in the 3D Printing Handbook for MK3.5.
When you have finished adjusting the layer, examine the result and compare it preferably with the 3D Printing Handbook.
The printer will ask you to repeat the adjustment of the first layer procedure. In case, you achieve the best result, select NO.
Wizard complete
Wizard complete
Wizard complete
The printer is now fully calibrated. Follow this guide to the end to load a filament in and start a test print.
Once the Wizard finishes, the details screen will show up. Click the knob to continue.
Congratulations! Your printer is finally ready to print. Hit CONTINUE and let's move on.
Reward yourself!
Reward yourself!
It looks like you have successfully assembled and connected everything. No doubt ;). Congratulations! You deserve a big reward for that. Eat all the remaining gummy bears... and don't forget to share with those who supported you during the assembly.
Did you know that Haribo gummy bears are one of the most important parts of the Original Prusa printers assembly instructions.
PrusaSlicer for MK3.5
PrusaSlicer for MK3.5
PrusaSlicer for MK3.5
PrusaSlicer for MK3.5
Ready to print your own models?
Visit help.prusa3d.com once again. Download and install the latest Drivers & Apps package onto your computer. This package includes the PrusaSlicer app.
Open the PrusaSlicer app. If you’re running it for the first time, Configuration Wizard will show up. Visit the Prusa FFF tab in the Wizard, select Original Prusa MK4 in the 0.4mm nozzle version (the default nozzle size) and hit Finish to start using the MK4 printer profile.
Make sure the Original Prusa MK3.5 is selected in the Printer menu on the right, when slicing for the MK3.5.
Import a model of your choice into PrusaSlicer, adjust the settings if needed, hit Slice and export the G-code file onto the USB drive to print it on your MK3.5.
Print your first model
Print your first model
For the first print, we have prepared a predefined test model. Download the model and upload it directly to the printer.
Upload the G-code to the printer.
You can upload G-codes using different methods: USB drive, PrusaLink, and Prusa Connect.
Run the print.
Join Printables!
Join Printables!
Join Printables!
Join Printables!
Don't forget to join the biggest Prusa community! Download the latest models in STL or G-code tailored for your printer. Register at Printables.com
Looking for inspiration on new projects? Check our blog for weekly updates.
If you need help with the build, check out our forum with a great community :-)
All Prusa services share one user account.
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