How to replace a heatbed (MINI/MINI+)

Relevant for:

MINI MINI+

Last updated 3 years ago

Difficulty

Very easy

Steps

Available languages

Step 1 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 2 Tools necessary for this guide

⬢For the following steps, please prepare:

⬢2.5mm Allen key

⬢TX10 Torx key

Step 3 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 4 Disconnecting the heatbed

⬢Disconnect the heatbed cable.

⬢Disconnect the heatbed thermistor.

Step 5 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 6 New heatbed - parts preparation

⬢For the following steps, please prepare:

⬢New heatbed (1x)

Step 7 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

⬢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

⬢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.