ABS warping can turn an otherwise successful print into a failed one. Lifted corners, curled edges, and distorted bases are common signs of uneven cooling and material shrinkage. Understanding what causes these issues is the first step toward preventing the.
Quick Answer: Why Does ABS Filament Warp?
ABS filament warps because it shrinks as it cools. Uneven cooling, poor bed adhesion, temperature fluctuations, and excessive part cooling can cause corners to lift and prints to deform. To prevent ABS warping, maintain a stable printing temperature, improve first-layer adhesion, adjust bed temperature and cooling, and use an enclosure when needed.
What Causes ABS Filament Warping?
ABS shrinks as it cools. During printing, newly deposited layers gradually lose heat and contract. When different areas cool at different rates, internal stress develops. If this stress becomes greater than the adhesion holding the print to the build plate, the corners can lift or the part can deform. The most common contributing factors include:
Temperature Fluctuations
Cold drafts, unstable room temperatures, and sudden changes in airflow can cause uneven cooling. This is particularly problematic for large ABS prints.
Poor Build Plate Adhesion
A dirty build plate, incorrect Z-offset, or insufficient first-layer adhesion can make it easier for shrinking corners to lift.
Incorrect Printing Settings
An unsuitable bed temperature can weaken first-layer adhesion, while excessive cooling can increase temperature differences between layers. Nozzle temperature also affects extrusion consistency and layer bonding.
Large or Sharp-Cornered Models
Large flat surfaces and sharp corners tend to experience more noticeable deformation as the material cools and shrinks.
How to Prevent ABS Warping
You don’t need to change every setting to solve ABS warping. Start with these four adjustments.
Use an Enclosed Printer
An enclosure helps maintain a more stable temperature around the print and reduces the impact of cold drafts.
For conventional ABS, enclosed printing is generally recommended, especially for large or complex models. Keep the enclosure closed during printing and avoid sudden airflow changes.
Learn more about the benefits of enclosed printing in our ABS Filament Enclosure Guide.
Improve Build Plate Adhesion
A strong first layer helps prevent shrinking corners from pulling away from the build plate.
- Clean the build plate before printing
- Check the Z-offset and first-layer contact
- Apply a suitable adhesive if needed
- Add a 5–10 mm brim for models with large bases or sharp corners
Adjust Bed Temperature and Cooling
The heated bed helps keep the first layers warm and attached. For iSANMATE ABS HF, the recommended bed temperature is 80–100°C. Start around 90–95°C and adjust according to your printer and build plate. You can also check our ABS Temperature Settings Guide for more details on nozzle and bed temperature settings.
Keep part cooling low during ordinary ABS printing. For iSANMATE ABS HF, the recommended fan range is 0–30%, depending on the model and printer. Starting with 0% for the first few layers is a practical approach.
Avoid excessive bed temperatures or cooling, as both can create other print quality problems.
Keep Filament Dry
Moisture is not the main cause of thermal warping, but it can lead to inconsistent extrusion and surface defects.
If your filament shows signs of moisture, dry iSANMATE ABS HF at 60–70°C for 5–8 hours before printing. Store it in a sealed container with desiccant after drying.
See our High-Speed ABS Printing Guide for more filament preparation and printing tips.
Can High-Speed ABS Improve Printing Stability?
High-Speed ABS does not eliminate warping, but its higher flow capacity allows for more consistent extrusion at higher printing speeds when the printer and settings are properly matched.
Conventional ABS may struggle to maintain consistent extrusion when pushed beyond its practical flow capacity. High-Speed ABS is formulated to handle higher material flow, helping reduce extrusion-related problems during faster printing.
We tested iSANMATE ABS HF on both an open-frame Bambu Lab A1 and an enclosed Bambu Lab H2D. Both setups achieved printing speeds of up to 500 mm/s when printing a simple model under our test conditions.
These tests show that an actively heated or enclosed chamber is not essential for every ABS HF application. However, an enclosure can still help reduce drafts and temperature fluctuations, particularly when printing large or complex parts.
Whether you use an open-frame or enclosed printer, proper ventilation is important when printing ABS. Consider suitable local exhaust or air filtration, and follow the printer manufacturer’s recommendations. An enclosure alone does not guarantee that airborne emissions are adequately controlled.
For more information about printer compatibility and enclosure requirements, see our High-Speed ABS Filament Guide.
Final Thoughts
ABS warping is mainly caused by uneven cooling and material shrinkage. Start by improving bed adhesion and maintaining a stable printing temperature before adjusting other settings.
High-Speed ABS supports higher extrusion rates, but successful printing still depends on the right printer, model, and environment. Choose your settings based on the part you’re printing, not just the maximum speed your printer can reach.
