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  1. Ensure the printer is turned off and not plugged in. While moving with the extruder, the X-axis motor works as a generator. You will create a small amount of electricity and the LCD might flicker. Move with the extruder reasonably slowly and in the future always use the printer's controls. Move the extruder manually all the way to the left.
    • Ensure the printer is turned off and not plugged in.

    • While moving with the extruder, the X-axis motor works as a generator. You will create a small amount of electricity and the LCD might flicker. Move with the extruder reasonably slowly and in the future always use the printer's controls.

    • Move the extruder manually all the way to the left.

    • By rotating BOTH threaded rods at the same time on the Z-axis move the nozzle until you reach the heatbed. Try rotating both the rods equally!

    • Check again from a different angle the nozzle is touching slightly the heatbed. Don't bend the heatbed!

    • Don't place the steel sheet on the heatbed during the entire P.I.N.D.A. probe adjustment process. Wait for the XYZ calibration.

  2. Move the extruder carefully all the way to the right. Make sure that the nozzle is not scratching the surface during the movement! If it does, rise the right side of the X-axis by rotating the right Z motor slightly clockwise.
    • Move the extruder carefully all the way to the right.

    • Make sure that the nozzle is not scratching the surface during the movement! If it does, rise the right side of the X-axis by rotating the right Z motor slightly clockwise.

    • If an adjustment is needed, you can lower the nozzle height by rotating the right Z motor counter-clockwise.

  3. Move the extruder to the centre of the X-axis. Take a zip tie from the package and place it under the P.I.N.D.A. sensor. Use the middle part of the zip tie, not the tip. Release the screw holding the P.I.N.D.A. sensor and gently press it against the zip tie.
    • Move the extruder to the centre of the X-axis.

    • Take a zip tie from the package and place it under the P.I.N.D.A. sensor. Use the middle part of the zip tie, not the tip.

    • Release the screw holding the P.I.N.D.A. sensor and gently press it against the zip tie.

    • Tighten the screw on the P.I.N.D.A. holder again. Proceed carefully as you might break the holder!

    • !!! DO NOT use glue to fix P.I.N.D.A. probe in the new type of holder with the M3 screw, you won't be able to release it again !!!

    • A correct height of the P.I.N.D.A. sensor compared to the nozzle should be similar to the last picture.

  4. Go to www.prusa3d.com/drivers and download latest PRUSA3D drivers for your printer.
  5. ATTENTION!!! MK2/S and MK2.5S have a different firmware. You must upgrade!
    • ATTENTION!!! MK2/S and MK2.5S have a different firmware. You must upgrade!

    • Download the zip file with the firmware for the MK2.5S to your computer and unzip it.

    • Updating firmware for the first time? Here is a step by step guide: Upgrading the firmware v1.6

  6. Please watch our New User Guide before printing. http://www.prusa3d.com/buildvideoMK3
    • Please watch our New User Guide before printing. http://www.prusa3d.com/buildvideoMK3

    • This video is describing features of Original Prusa i3 MK3, but your Original Prusa i3 MK2.5S shares some of them as well.

  7. Based on the examination of printers received back from the customers, we compiled a list of the most common problems causing poor print quality. Check them out and improve your 3D prints today!
    • Based on the examination of printers received back from the customers, we compiled a list of the most common problems causing poor print quality. Check them out and improve your 3D prints today!

    • Check the video here: https://youtu.be/Lsa-PXAXdKY

    • For other tips and tutorials go to: https://help.prusa3d.com/

  8. See our free 3D Printing Handbook - prusa3d.com/3dhandbookMK25S Read the chapters Disclaimer and Safety instructions
    • See our free 3D Printing Handbook - prusa3d.com/3dhandbookMK25S

    • Read the chapters Disclaimer and Safety instructions

    • Read the chapter Setup before printing.

    • Calibrate the printer by following the chapter Calibration flow and wizard. Please follow the steps exactly, otherwise you can permanently damage the print surface!

  9. Read the chapter 7 Printing of 3D Printing Handbook.
    • Read the chapter 7 Printing of 3D Printing Handbook.

    • Congratulations! You should be ready to print by now ;-)

    • You can start by printing some of our test objects bundled on the included SD card - you can check them out here prusa3d.com/printable-3d-models

  10. If you encounter any problems at all, don't forget you can always check out our knowledge base at http://help.prusa3d.com. We're adding new topics every day!
    • If you encounter any problems at all, don't forget you can always check out our knowledge base at http://help.prusa3d.com. We're adding new topics every day!

  11. If you need help with the build, check out our forum with great community :-)
    • If you need help with the build, check out our forum with great community :-)

    • Account is shared with http://shop.prusa3d.com/

    • Support forum is available at http://forum.prusa3d.com

    • That's it, the assembly is over. Calibrate the printer according to the Handbook and you are ready to print!

    • We hope, you've enjoyed the build. Don't forget to leave feedback and see you in the next one :)

Finish Line

12 other people completed this guide.

Jakub Dolezal

Member since: 02/20/2017

225 Guides authored

Team

Prusa Research Member of Prusa Research

Community

3 Members

367 Guides authored

3 Comments

Overall, this guide was very easy to follow as a successful upgrade path from Prusa i3 2S to Prusa i3 2.5S. Thank you, prints are improved, more impressed every day.

noel.dixon@3dmakerbase.com - Reply

Just a note. I tried to load the filament manually before doing any calibration runs so it would be ready for the test print. The extruder motor will not run until you have ran the calibration wizard. Then the extruder will load filament for you. This was a costly lesson for me. I thought the motor had went out, ordered a new one, still didn’t work. I went ahead with all the calibration steps and afterwards, the wizard said it would preheat for filament loading. Worked as it should. I now have an extra step motor, and 2 weeks without my printer. Maybe this should be mentioned in the setup portion of the instructions???

Doug Stacy - Reply

Hi Doug, it’s usually better to contact our tech support before purchasing any replacements on your own - we can always advise you if the part is indeed faulty.

Filip M - Official Prusa CS -

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