Lower nozzle more than -2.000 (first layer calibration)
I changed my filiment recently from Prusament PLA to eSun PLA+ which clogged in my PTFE tube. After taking everything apart and put back together, I was experiencing poor first layer adhesion and failed prints. When I go to calibrate the first layer it seems like the nozzle is still too far from the bed but the calibration will not allow me to lower it more than the -2.000 that I am currently at. When I try to loosen the nozzle to close the gap, the heater block is loose which doesn't seem right. Any thoughts on how to go about resolving this issue?
RE: Lower nozzle more than -2.000 (first layer calibration)
You loosen the nozzle to get it closer to bed??.. well, I recommend you take hot end apart again and clean it.
If you're at -2.00 with Z-offset and nozzle is still too far from bed, then you should pull up PINDA for about 1mm -and after that execute fresh first layer calibration.
[Mini+] [MK3S+BEAR]
RE: Lower nozzle more than -2.000 (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 for adjusting the PINDA 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 
RE: Lower nozzle more than -2.000 (first layer calibration)
@bogdanh
Did what you said and it's looking much better. Thanks. I had not thought to move the MINDA to adjust the nozzle distance.
RE: Lower nozzle more than -2.000 (first layer calibration)
@eustache ... yes, is not that obvious at first sight (pull up to get closer, I mean). Glad you made it working now 😀
[Mini+] [MK3S+BEAR]
RE: Lower nozzle more than -2.000 (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 for adjusting the PINDA 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
As someone who purchased my Mini as an assembled kit, and having problems with my satin sheet, I’m so glad I came across this post. Thank you. This should be a sticky somewhere.
Mini+MK3S+XL 5 Tool