0. Preparing necessary componentsWritten By: Jakub Dolezal

0. Preparing necessary components

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Step 1 — Disclaimer and safety instructions

The Original Prusa i3 MK3 iscompatible with OctoPrint, butPrusa Research isn't developing thissoftware. For connection issuesplease contact our support. In caseof general issues, please use theofficial OctoPrint's FAQ.

OctoPrint homepage: octoprint.org

Please report all the bugs here:github.com/foosel/OctoPrint/issues

You can share your experience anddiscuss your issues during prints onour forums with other MK3 owners:OctoPrint issues and tips

DO NOT disassemble the printeryet!!! We need to print some partsfirst.

Certain parts of this manual requireusage of soldering or cutting tools.Please read carefully theinstructions for such device/tooland use personal protectiveequipment. Prusa Research doesnot assume responsibility, andexpressly disclaim liability for loss,injuries or damage.

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Step 2 — Purchasing Raspberry Pi Zero W

Make sure you are buying the original Raspberry Pi Zero W. This guide isn't covering anyother fruit alternatives like Banana Pi, Orange Pi, etc.

Also, distinguish between models Pi Zero W and Pi Zero . The letter "W" stands for Wireless.Buying cheaper Pi Zero without Wi-Fi radio won't work for this guide!

For the list of official dealers for your country, please visit Raspberrypi.org and click on "Buy now".

No need to buy a power supply, your RPi Zero W will be powered directly from the printer.Purchase only the Zero W and Micro SD card (8GB card is recommended) .

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Step 3 — Printing new parts

To ensure correct position of pins and optimal distance, our developers created a printed part RPiZero Frame, which is placed between RPi Zero W and EINSY board.

RPi Zero Frame is part of the MK3 package, download it from our pages: prusa3d.com/prusa-i3-printable-parts/

Prepare the G-code using Slic3r PE or PrusaControl, both applications are part of the driver'spackage: prusa3d.com/drivers/

Recommended settings for print are profile 0.2 Normal and material PETG or ABS. You can alsouse PLA, but it might be exposed to high temperatures.

Print the frame before you proceed further, you will need it in the next steps.

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Step 4 — Printing new parts (optional)

Printing this part is optional as it is only compatible with printed parts B7 or latest. Check youprinter, if it has removable part on the Einsy-case.

In case your Einsy-case is compatible, please look for a file called "raspberry_cover.stl" in theMK3 zip archive, you've downloaded in the previous step.

Recommended settings for print are profile 0.2 Normal and material PETG or ABS. You can alsouse PLA, but it might be exposed to high temperatures.

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Step 5 — Purchasing GPIO header for RPi

To create a connection between RPi Zero W and EINSY board you need to purchase GPIOheader and solder it to the RPi board.

First, you need to buy break-away 2x20-pin Strip Dual Male Header. Best is to purchase pins,which are 18 mm long.

However, the "standard" pins are quite often too short, so as a second item, you might need topurchase blanket header. Pins must be 18 mm long and you need at least 6 pins (see the secondpicture).

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Step 6 — Preparing and checking the GPIO header

Take the dual male header and cut away part with 7x2 pins.

Remove all the short pins from the dual male header.

Instead, insert longer 18mm pins as shown in the scheme. You need ONLY SIX PINS!

Before soldering, make a quick check the pins overlap from the board at least 1 mm. Don't forgetto use the printed adapter.

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Step 7 — Soldering the GPIO header

Double check your work! Incorrect position of the pins can lead to damage both to RPi Zero Wand EINSY board.

Solder the header to the RPi Zero W. Make sure you are soldering the header to the correctposition and side.

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Step 8 — Installing OctoPrint on the MicroSD card (Part 1)

You can either download PrusaPrint (modified OctoPrint build) created by Josef or visit ourKnowledge Base to see step by step guide, how to build your own. This depends on your skills.

Download link for prebuild image: PrusaPrint

Link to Knowledge Base guide: OctoPrint - Raspberry Pi Zero W

Next download Etcher utility, install it and open it.

Unpack the zip archive and "Flash" the image to the MicroSD card. Keep in mind, all the data willbe erased.

When the process is ready, reinsert the SD card to your computer and open the boot partition, findfile octopi-wpa-supplicant.txt

Edit the highlighted rows with your Wi-Fi name and password, delete the # sign onindicated rows, then save the file.

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Step 9 — Installing OctoPrint on the MicroSD card (Part 2)

ATTENTION: for the security reasons please change the default root password. As soon as youconnect your printer to the internet, the bots will try login using default password and canDAMAGE your printer!

Open any text editor and create a file named: octopi-password.txt (use plain text)

Type your password, use special characters, CAPS, numbers, etc. For example Prusa3D.MK3(don't use the same password)

Save the file and place it on the boot partition.

During the first boot, OctoPrint will change the password according to this file and delete the file forsecurity reasons.

Unmount the card and place it into the RPi Zero W.

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This document was last generated on 2018-10-02 06:44:35 PM.

Step 10 — Choose the right chapter

The following chapter should be selected according to the version of the Einsy-case you have onyour printer:

Version with removable back, follow this chapter : Einsy-case with the RPi preparation

Version without removable back, follow this chapter : 1. Printer disassembly

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