Nozzle crashed into the heatbed | Prusa Knowledge Base

If this occurs it indicates a problem with the P.I.N.D.A. or SuperPINDA sensor. P.I.N.D.A. stands for Prusa INDuction Auto leveling. It is the Z-axis end-stop on the MK2/S and MK3/S. It accurately detects metal within a certain range, so if the nozzle crashes into the bed the P.I.N.D.A. is either adjusted too high in relation to the nozzle, or the sensor itself or its cable may be faulty.

A faulty or maladjusted P.I.N.D.A. can also cause issues during mesh bed-leveling and/or XYZ calibration.

Testing the P.I.N.D.A./SuperPINDA sensor

If the P.I.N.D.A. sensor, or more commonly any of its wires, is damaged there can be multiple different leveling issues. Please see P.I.N.D.A./SuperPINDA Sensor testing for more information.

Lowering the PINDA

The P.I.N.D.A./SuperPINDA holder is closed by a screw marked by the purple arrow in the picture below. In order to change the height of the sensor, open this screw.

Lower the P.I.N.D.A. sensor by 1-2 threads, or redo the pre-flight check, where you use the thin tip of the zip-tie instead of the thicker center which is instructed (circled in green in the picture below).

Make sure to tighten the holder screw after adjusting the height.

2 comments

KennyV

•

almost 3 years ago

I have 3 Mk3S+ units. I would like to check the offset of my PINDA's. With that said my machine did not come with any zip ties. What is the height above the nozzle I should be shooting for? I have not been able to find an accurite distance in the manual or online anywhere. I have seen videos that all give different numbers from .75mm to 1.5mm. I would like to make sure I set it to the proper height.
THANK YOU

Giuliano - Official Prusa CS

•

almost 3 years ago

Hello. The PINDA is about 0.8 - 1.0 mm above the bed. If you don't have a zip tie to put under the PINDA, you can use a credit card, which has the right thickness.

Drual

•

almost 4 years ago

hi, when i am using textured sheet everything works perfect. But after i change to smooth one nozzle starts crashig. Any advice?

Drual

•

almost 4 years ago

I moved PINDA tiny bit lower and everything is fine. And I had to recalibrate 1st layer for both of the sheets

David

•

almost 4 years ago

Hi! Oh yes, the smooth sheet is a bit thicker! First layer calibration for both the textured and smooth profiles in HW setup should be enough to compensate for the difference if PINDA height is set according to the manual.