⬢1.5mm Allen key (1x)

⬢Needle-nose pliers / tweezers (1x)

⬢Wrench 10 mm (1x)

⬢Cloth or piece of fabric 15x15 cm (1x)

The cloth will be used to protect the heatbed. You can use any similar material.

⬢Loosen the upper fitting and remove the long PTFE tube from the hotend.

⬢Release and remove the lower fitting from the heatsink.

⬢Carefully pull out the old PTFE tube from the heatsink using pliers or tweezers.

⬢Use your phone LED flash or similar device to shine into the hole from the top of the print head. Take a look inside and check there is no filament in the bottom of the heatbreak. It must be clean and you should see only the metal surface inside. Open the full-size image if needed.

⬢Insert and push the new PTFE tube into the heatbreak all the way down.

Orientation of the PTFE tube installation does not matter. Both ends are symmetrical.

⬢Loosen three screws on the side of the heatsink with 1.5 Allen key.

⬢Push the nozzle up. You must see the PTFE tube moving up a bit.

⬢Mount the "lower" fitting to the top of the heatsink. Screw it all the way, but don't tighten it. As soon as you reach the end of the thread, release it by a full turn (360 °).

⬢Push the heaterblock up against the fitting with a reasonable force. No need to bend the entire axis. This will pre-stress the PTFE tube inside. Now, it is important to keep the slight upwards pressure.

⬢Make sure the heaterblock is aligned with the heatsink. If not, realign it, but keep the pressure.

⬢While holding the heaterblock from below (pressing the tube inside), tighten all three grub screws.

⬢Now, you can release the heaterblock. Make sure it doesn't move. If so, the grub screws were not tightened properly. Release them and return to the beginning of this step.

⬢Finish tightening of the "lower fitting", you should do a full turn to compensate for the turn we did in the previous step.

⬢Mount and tighten the upper fitting with the long PTFE tube with a wrench. Do not use excessive force!

⬢Open the inspection door on the extruder and check whether the pulley is clean.

⬢If there is too much filament residue on the pulley use compressed air to get rid of dust or follow this guide How to access and clean the extruder-pulley - MINI for a more thorough cleaning.

⬢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 M.I.N.D.A./SuperPINDA sensor.

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

⬢Gently press the M.I.N.D.A./SuperPINDA sensor down against the credit card.

⬢Tighten the screw on the minda-holder. Do not use an 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, please follow the instructions for the First Layer Calibration (MINI/MINI+).