Do these 3 things before closing this tab:
1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errorsStart by identifying where the defect is: at the bed-facing edge, between separate features, around the bottom perimeter, along a vertical seam, or on a surface printed over supports. Those locations point to different causes. Check the material profile and first layer before changing settings, then test one adjustment at a time; a temperature, fan, or Z-offset value that works on one printer may not work on another.
Identify the defect before changing settings
Note the filament, the defect’s location, and whether it appears on every print or only on a particular shape. Check whether the printer is exposed to drafts and whether the same spool behaves differently on another print. Material and geometry affect shrinkage, cooling, and adhesion, so begin with a slicer profile matched to the filament and printer rather than a setting copied from another setup. Prusa’s warping guidance explains why temperature differences and material behavior matter.
- Bed-facing corners lift: investigate first-layer adhesion, shrinkage, and drafts.
- Fine hairs span gaps: investigate oozing, temperature, retraction, and filament condition.
- The bottom edge bulges outward: check first-layer squish for elephant foot.
- A vertical scar or scattered marks appear: inspect the layer seam in the slicer.
- A downward-facing area is rough: consider supports, orientation, and cooling.
Fix lifting and warping at the bed
Clean and calibrate the first layer
Clean grease from the build surface using a method approved for that sheet. Prusa lists wiping with IPA 90%+ as one approach; check your surface’s compatibility before using it. Then inspect first-layer calibration. The goal is an even layer that is slightly squished and adheres consistently: gaps or round, poorly joined lines can indicate the nozzle is too high, while excessive squashing can indicate it is too low. Use the visual result and your printer’s calibration procedure rather than borrowing another machine’s Z-offset. See Prusa’s first-layer troubleshooting and first-layer calibration guidance.
Match adhesion and cooling to the material
If corners still lift, confirm that the profile suits the filament, the cooling fan works and is not obstructed, and drafts are not cooling the part unevenly. A brim can add contact area. A thin glue-stick layer may help on compatible sheets and materials, and can also act as a separation layer, but it is not a universal fix: excess adhesion can make removal difficult or damage some surfaces.
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For a small overhang curling upward while the base remains attached, do not automatically add bed-adhesion measures. Check local airflow and heat retention. Prusa suggests that fan speeds of 10–20% may help some steep overhangs or small parts in heat-retaining conditions, including some ABS or PC Blend prints. Treat that as a conditional test, not a general target. Too much cooling can lift the part or weaken layer bonding; if stronger cooling leads to weak bonds or cracking, restoring bonding may require a higher nozzle temperature within the filament maker’s range.
Reduce stringing between features
Stringing, sometimes called “hairy prints,” is filament left between features during nozzle travel. Prusa identifies high printing temperature and incorrect retraction settings as common causes. Its stringing and oozing guide also recommends checking filament moisture, travel behavior such as avoiding perimeter crossings, and hotend assembly or heat dissipation if slicer settings do not explain the problem.
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- Check the filament profile and temperature range. If the nozzle temperature is near the high end of the filament maker’s range, test a small reduction while watching for weaker layer bonding.
- Change temperature in a controlled step. Prusa suggests lowering nozzle temperature by 5–10 °C as a stringing test. Keep within the filament maker’s guidance and compare the result with the original print.
- Review retraction for your extruder and slicer profile. Do not copy a retraction distance from a different printer; the appropriate settings depend on the hardware and profile.
- Check filament and hardware if settings do not help. Moisture or a hotend assembly or heat-dissipation issue may be involved. If a temperature or retraction change makes the print worse, revert it before investigating further.
A heat gun can remove wispy strings after printing, but use only brief exposure: too much heat can deform the part. Small, thin, or finely detailed pieces are particularly easy to damage. Prusa’s string-removal guidance describes this cleanup option.
Correct a flared bottom edge
Elephant foot is a bottom perimeter that spreads outward, usually because the first layer is squished against the heated bed and becomes wider than the layers above it. Check first-layer calibration and bed conditions before compensating in software. If the part needs a precise fit, slicer elephant-foot compensation can be tested after calibration; Prusa gives around 0.2 mm as a starting point for a default 0.4 mm nozzle. That figure is not universal and may need adjustment for the printer, material, and geometry. See Prusa’s elephant-foot compensation guide.
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Choose a seam position for visible edges
A vertical scar or a line of small blobs may be the layer seam, where each layer starts or ends. Elephant-foot compensation will not fix a seam. Inspect the sliced model and choose placement based on the part’s appearance and function: align the seam with a less visible corner, paint a location, or distribute seam points. Random placement can replace one continuous scar with scattered marks, which may be worse on a cosmetic face or close-fitting feature. Prusa explains seam placement in its seam-position guidance; OrcaSlicer also documents seam options.
Improve rough surfaces printed over supports
A surface printed directly on the bed is generally smoother than one printed above supports, which can look less consistent and rougher. If the roughness is confined to a downward-facing supported surface, consider rotating the model or changing the support arrangement before assuming the nozzle is dirty. The best orientation depends on the geometry: reducing support marks may change the footprint, strength, or quality of another face. Account for small details, material shrinkage, and dimensional fit together. Prusa covers these design trade-offs in Modeling with 3D printing in mind.
Rank #4
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Balance the trade-offs when a first fix creates another problem
| Choice | Potential benefit | Trade-off to watch |
|---|---|---|
| More cooling for a small overhang | May improve some overhangs in heat-retaining conditions | Can contribute to lifting or weaker layer bonding |
| More bed adhesion | Can help resist lifting | Can make removal difficult or damage a compatible surface |
| Random seam placement | Avoids one continuous seam scar | Can scatter marks over a visible or functional face |
| Changing model orientation to avoid supports | May improve the finish of a visible surface | Can affect footprint, strength, or other surfaces |
When an adjustment trades one defect for another, return to the defect’s location and decide which surface or function matters most. Make one change at a time so the result remains attributable to that change.
Quick Recap
Best Value
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- 【Small Spool Diameter】- Spool Diameter: 140mm(5.5 inches), Spool Hub Hole Diameter: 53mm(2.08 inches), Spool Width: 36mm(1.4 inches). Please pay attention to the filament spool size! Please check if it is compatible with your 3D printer.
- 【PLA Plus Filament Bundle】- The design of 250g PLA+ filament is convenient for customers with multiple color needs. Especially for multi-nozzle 3d printer users and 3d pen users.
- 【SUNLU Wound Neatly Filament】- SUNLU R&D team has mastered advanced technology and produced Neatly Wound PLA+ Filament, which is impossible for other brands. No knot, no winding, improve printing efficiency.
- 【SUNLU PLA PLUS 3D Filament Advantages】- PLA PLUS filament is 10 times stronger than PLA Filament, the color is brighter, it has many advantages, Clog/Bubble/Tangle/Warping/Stringing free, easy to Use, better layer adhesion.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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