Quick diagnosis
Fix first-layer adhesion problems after changing a nozzle by checking nozzle height, Z-offset, bed cleanliness, and first-layer speed.
Likely causes
- Nozzle length changed slightly
- Old Z-offset is now too high
- Oil or dust on the PEI sheet
- First-layer speed is too aggressive
Step-by-step fix
- Confirm the nozzle is fully tightened at hotend temperature.
- Re-run Z-offset because a new nozzle can sit slightly higher or lower.
- Clean the build plate with warm water and dish soap, then dry completely.
- Slow the first layer and increase first-layer line width if the bead looks thin.
What to check before changing more settings
Only change one variable at a time. Save your current slicer profile before testing, use a small repeatable test print, and compare the result before moving to the next adjustment.
Helpful gear to check
These are contextual tool links, not required purchases. Use them only if they match your printer and the problem you are solving.
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PEI Build Plate
Check compatibilityUseful for this fix path. Confirm size, printer compatibility, seller, price, and return details before buying.
View on AmazonAmazon searchIsopropyl Alcohol
Check compatibilityUseful for this fix path. Confirm size, printer compatibility, seller, price, and return details before buying.
View on AmazonAmazon searchBed Adhesion Glue Stick
Check compatibilityUseful for this fix path. Confirm size, printer compatibility, seller, price, and return details before buying.
View on AmazonAmazon searchPlastic Scraper
Check compatibilityUseful for this fix path. Confirm size, printer compatibility, seller, price, and return details before buying.
View on AmazonContinue from this guide
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