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How to replace a heatbed (MINI/MINI+)

How to replace a heatbed (MINI/MINI+)

How to replace a heatbed (MINI/MINI+)
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Last updated a year ago
How to replace a heatbed (MINI/MINI+)
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Step 1 Introduction

Introduction
Introduction
This guide will take you through the replacement of the heatbed on the Original Prusa MINI and MINI+.
Some parts might slightly differ. However, it does not affect the procedure.
All necessary parts are available in our eshop shop.prusa3d.com
Note that you have to be logged in to have access to the spare parts section.

Step 3 Opening the box with the electronics

Opening the box with the electronics
Opening the box with the electronics
Opening the box with the electronics
Turn the printer off and unplug it from the socket!
Release and remove the M3 screw on the box with the electronics.
Remove the printed cable cover.
Lift the second electronics cover slightly. Before you remove it completely, pull it first towards the vertical aluminium extrusion to release both pins from the holes.

Step 5 Removing the heatbed

Removing the heatbed
Removing the heatbed
Removing the heatbed
Remove the steel sheet.
Move the Y-carriage all the way to you.
Release and remove 9 screws on the heatbed by using a Torx TX10 key.
Keep all the screws for the next steps.
Remove the heatbed from the printer.

Step 7 Mounting the heatbed

Mounting the heatbed
Mounting the heatbed
Mounting the heatbed
Mounting the heatbed
Move the Y-carriage all the way to you.
Place the heatbed on the Y-carriage.
Align all 9 holes on the heatbed with the heatbed spacers.
Insert nine M3x4b screws to the holes. DON'T fully tighten the screws.
After all screws are in place, tighten them in the following order:
Center screw
First four screws (edges)
Last four screws (corners)

Step 8 Connecting the heatbed cable

Connecting the heatbed cable
Connecting the heatbed cable
Connecting the heatbed cable
Connect the heatbed thermistor cable in the lower connector on the Buddy board.
Connect the heatbed cable in the lower green connector on the Buddy board.

Step 9 Covering the electronics

Covering the electronics
Covering the electronics
Covering the electronics
Covering the electronics
Before covering the electronics, make sure the square nut is correctly positioned in the printed part. The nut must not fall out! This can cause fatal damage to the electronics.
Insert the cover back in, make sure it is properly seated in the slot. Note: on an older design, there were holes instead of slots, the assembly procedure is the same.
Place the second cover on the top and arrange the cables:
Extruder bundle, ensure the textile sleeve is partially in. Also, it must be tilted away from the printer.
Heatbed bundle, ensure the textile sleeve is partially inside the box.
Filament sensor cable (optional), ensure that the textile sleeve wrapped around the cables is partially inside the box.
Now, tighten the second cover. Check that no cable is pinched.

Step 10 Final check

Final check
Final check
Final check
Final check
Connect the printer and turn it ON.
Use the knob and navigate to the Preheat in the Menu.
Select PLA.
Navigate back to the Info screen and check if the temperature rises.

Step 11 It's done!

It's done!
It's done!
Good job! You just replaced the heatbed on your Original Prusa MINI printer.

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