The Induction auto-leveling sensor is a vital component facilitating the calibration of the MINI and MINI+. It acts like the Z end-stop and is the main component in mesh-bed leveling. You may have either:
Starting from firmware 4.3.0, the MINI has the option to see the readings of the M.I.N.D.A./SuperPINDA on the printer's display. Go to Info -> Sensor info, and you will see the M.I.N.D.A./SuperPINDA status. Note that the menu will always have M.I.N.D.A. written, even if you have the SuperPINDA.
For safety reasons, the M.I.N.D.A./SuperPINDA will always trigger "1" if disconnected, to prevent it from crashing the nozzle into the bed, should it fail. Therefore it is a telltale sign of a fault if the Z-axis will move upwards during the mesh bed leveling or homing, sometimes going up for a couple of points, then lower back down. This happens as the M.I.N.D.A./SuperPINDA loses connection when the print head is in certain positions due to a small break in the wire.
Firstly, we need to check if the M.I.N.D.A./SuperPINDA sensor works at all. For this test, you need a small and thin metal object (spatula, screwdriver, pliers).
|LED not lit, in the presence of metal