Nozzle too low for a good first layer calibration  

RE: Nozzle too low for a good first layer calibration

Posted by: @nocturno

Why my nozzle is too low to get a good first layer calibration? Right now is at -1.765 for the steel sheet.

I set the PINDA as instructed with the tie wrap i even lowered a little more but same result. Is this normal or maybe some bad assembly?

Thanks

you should be able to get a good layer, why is -1.675 a problem? 

If you want the number to be smaller, 
reset your live Z to 0.0 mm for safety, then raise your pinda 1 thread, that should equate to 1mm, then reset your live Z (If you don't reset your live Z to 0.0mm you may damage your build plate. )

are you using 7x7 mesh bed levelling (LCD Choice) ?
have you tried 'Life Adjust Z My Way' by Jeff Jordan?
https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-assembly-and-first-prints-troubleshooting/life-adjust-z-my-way/
there are test files in a zip file at the bottom of the first post.

Is your build plate really clean, no fingerprints no contamination?

have you tried 70C on the bed for PLA? 

regards Joan

RE: Nozzle too low for a good first layer calibration

@joantabb

Because in the first layer guide state a common range is -0.400 to -1.500 I though -1.765 was too low but i will try your suggestions. Thank You Joan!

RE: Nozzle too low for a good first layer calibration

the window of acceptable live Z values for Your printer is unique to you. 
and it is quite a narrow range. 

this is a print off my printer for example.

the values are unique to my printer, but the differences indicate the changes in quality over a small live Z range. 

regards Joan

RE: Nozzle too low for a good first layer calibration

If you're close to or above -2, I would reposition the PINDA higher.

The Super PINDA should have about 1.5 mm distance between nozzle and SPINDA, so that you’re around -1 when your Live Z is correct. (For the old PINDA, it was 0.8mm).

Instructions are in Step 16 of https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mini-mini_179912 (Mini) or
https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mk3s-mk3s_179920 (Mk3S)

I put this little helper on Prusaprinters.org to help position the SPINDA: https://www.prusaprinters.org/prints/57192-spinda-height-adjustment-tool-mounts-into-3030-ext . Works better than zip ties or credit cards, which have less well-defined heights.

For an illustration of relationship of distance of PINDA to nozzle and sheet, see