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How to replace SuperPINDA (MINI/MINI+)

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How to replace SuperPINDA (MINI/MINI+)

How to replace SuperPINDA (MINI/MINI+)
Relevant for:
Last updated a year ago
How to replace SuperPINDA (MINI/MINI+)
 Difficulty
Moderate
 Steps
16
 Available languages
CSDEESFRITPL

Step 1 Introduction

Introduction
Introduction
This guide will take you through the replacement of your current sensor for the SuperPINDA on the Original Prusa MINI and MINI+.
All necessary parts are available in our eshop shop.prusa3d.com
This guide can be used for replacing both M.I.N.D.A. and SuperPINDA sensors.

Step 2 Tools necessary for this guide

Tools necessary for this guide
Tools necessary for this guide
Tools necessary for this guide
2.5mm Allen key
Needle-nose pliers for zip ties
Will be used later on. Zip ties are included with the SuperPINDA replacement set.
Cloth or piece of fabric 15x15 cm
The cloth will be used to protect the heatbed. You can use any similar material.

Step 3 Additional heatbed protection

Additional heatbed protection
Additional heatbed protection
Make sure the printer parts - print head and heatbed are cooled down at room temperature.
Turn the printer off and unplug it from the socket!
Before these steps, it is recommended to protect the heatbed!
Take off the flexible steel sheet.
Use any cloth or piece of fabric, which is thick enough and cover the heatbed. This will ensure you won't damage (scratch) the surface during the disassembly.

Step 4 Opening the box with the electronics

Opening the box with the electronics
Opening the box with the electronics
Opening the box with the electronics
Release and remove the M3x12 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 aluminium extrusion to release both pins from the holes.

Step 5 Removing the textile sleeve

Removing the textile sleeve
Removing the textile sleeve
Removing the textile sleeve
Removing the textile sleeve
Cut the zip ties attached to the extruder.
Start carefully removing the textile sleeve from the entire cable bundle. Note that on some units the sleeve might be fixed using a zip tie, cut it carefully. Avoid pulling the cables!
Remove the textile sleeve from the MINI-fan-spacer-clip.

Step 7 Removing the SuperPINDA sensor

Removing the SuperPINDA sensor
Removing the SuperPINDA sensor
Removing the SuperPINDA sensor
Press the safety pin on the connector and disconnect the SuperPINDA sensor from the board. Do not pull out the connector without pressing the pin, it may damage the connector or the board.
Release slightly the screw on the minda-clip.
Grab the SuperPINDA sensor by the metal part and pull it out from the minda-holder.
If you feel resistance while pulling the sensor, stop and loosen the screw more.
Keep all the removed screws and nuts for the reassembly.

Step 8 SuperPINDA sensor - parts preparation

SuperPINDA sensor - parts preparation
SuperPINDA sensor - parts preparation
SuperPINDA sensor - parts preparation
For the following steps, please prepare:
New SuperPINDA sensor (1x)
Zip tie (4x)
Old credit card (1x) new might be demagnetised
In case you don't have an old inactive credit card, you can use a tip of the zip tie, which has a similar thickness.

Step 9 SuperPINDA sensor installation

SuperPINDA sensor installation
SuperPINDA sensor installation
SuperPINDA sensor installation
Insert the new SuperPINDA sensor into the MINI-minda-holder.
Screw in the M3x12 screw by 2-3 threads. We'll tighten it later.
Adjust the SuperPINDA sensor position, there should be about 4-5 threads below the MINI-minda-holder. This a temporary position for now. We will set the proper one later on.
Tighten the screw on the minda-holder. Do not use excessive force, you can damage the minda-holder!

Step 10 Guiding the cable bundle

Guiding the cable bundle
Guiding the cable bundle
Guiding the cable bundle
Push all the cables from the print head into the MINI-fan-spacer-clip. Orient the clip as shown in the picture, the beveled side is up.
Guide the print fan cable through MINI-fan-spacer-clip groove.
Slide down the MINI-fan-spacer-clip and mount it on the spacer with the M3x20 screw. Tighten the screw, then release it slightly by 1/4 of turn (90 °). No nut is ​​needed here.
The MINI-fan-spacer-clip must move freely.

Step 11 Guiding the cable bundle

Guiding the cable bundle
Guiding the cable bundle
Guiding the cable bundle
Guiding the cable bundle
Merge all cables leading from the hotend together and guide them up.
Place the textile sleeve on the cable bundle and slide it into the MINI-fan-spacer-clip so that 2-5 mm of the sleeve extends over on the other side.
Don't pull the cables, leave some slack around the fan.

Step 12 Guiding the cable bundle

Guiding the cable bundle
Guiding the cable bundle
Guiding the cable bundle
Guiding the cable bundle
WARNING: Follow these instructions carefully! If you mount the cable bundle at an incorrect position, you will have issues while printing!
Start by rotating the lead screw until the X-axis is all the way up.
Move the print head all the way to the right and ensure it is touching the printed part.
Bend the cable bundle slightly and use the upmost zip tie slot to partly tighten the entire bundle.
Add the EXTRUDER motor cable to the bundle and use the textile sleeve to cover the cables all the way down to the electronics.
Check whether the textile sleeve can reach the inner space of the electronics cover. If not, you left too much slack above the X-axis, readjust it.
Go back to the X-axis and check once again, that the print head can move all the way to the right without being pulled back by the cable bundle.

Step 13 Guiding the cable bundle

Guiding the cable bundle
Guiding the cable bundle
Guiding the cable bundle
Guiding the cable bundle
Tighten the zip tie, you've installed in the previous step, but use a reasonable force or you might break the cables. Rotate the zip tie's head to the left.
Add a second and third zip tie. Again, tighten carefully and rotate the heads to the left.
Move the print head all the way to the left to ensure there is no collision between the zip ties and the fan's casing.
Secure the textile sleeve with a fourth zip-tie 1-2 mm before the end of the wiring harness. Tighten so that the textile sleeve doesn't move freely. Do not tighten too much, cables may get pinched.
Try to pull the sleeve by hand and make sure it does not move.

Step 15 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 holes.
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 16 SuperPINDA sensor height adjustment

SuperPINDA sensor height adjustment
SuperPINDA sensor height adjustment
SuperPINDA sensor height adjustment
SuperPINDA sensor height adjustment
Using your fingers turn the lead screw and move the entire X-axis down. Stop when the hotend touches the heatbed! Avoid bending the heatbed!
Release slightly the screw on the minda-holder so you are able to adjust position of the SuperPINDA sensor.
Place a credit card under the SuperPINDA sensor or use a tip of the bundled zip tie.
In case you don't have an old inactive credit card, you can use a tip of the zip tie, which has a similar thickness.
Gently press the SuperPINDA sensor down against the credit card.
Tighten the screw on the minda-holder. Do not use excessive force, you can break the printed part!
Rotate the lead screw manually in the opposite direction to move the axis at least 5 mm up.
Now, place the steel sheet back on the heated. Turn the printer ON and run the First Layer Calibration. For more information, please follow this  article.

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