ABS is one of the most widely used materials in industrial 3D printing for making strong, functional, professional-grade parts. However, when printing large parts, problems such as warping, cracking and layer separation become far more common because of thermal stress and uncontrolled temperature changes throughout the print. In large-format FDM printing, thermal stability is not just important: it is essential for reliable, repeatable industrial results.
ABS shrinks as it cools. In large parts, the temperature difference between the lower layers and the upper layers builds up internal stresses. When these stresses exceed the strength of the material, the part lifts off the build plate and deforms.
Layer cracking (delamination) happens when layer adhesion is insufficient. It is usually caused by rapid cooling, a low extrusion temperature, a low chamber temperature or airflow hitting the part directly, all of which create high internal stresses in the part.
As a result, the layers separate and the part loses strength.
When printing large, functional ABS parts, thermal control is not optional: it is essential. A stable environment, the right temperatures and an industrial-grade 3D printer make the difference between failed prints and reliable industrial parts.
An enclosed, heated chamber maintains a stable, uniform environment, which reduces the temperature gradient and lets the part cool slowly and evenly. This minimises internal stresses and prevents warping and cracking, avoiding unexpected defects in the parts.
Airflow makes ABS cool abruptly and builds up stress in the part. Besides using an enclosed chamber to block external drafts, there is one component every 3D printer has that is often overlooked: the part cooling fan. Our recommendation: turn it off!
Many printers have flatness problems with their build plates, which makes getting a good first layer difficult. R3DIMENSION printers use R3D Static technology, which ensures a perfect first layer and keeps parts firmly attached to the platform whatever their geometry.
In our experience, printing large ABS parts reliably takes more than temperature: bed adhesion is key. The adhesives that have worked best for us are Dimafix and Nano Polymer Adhesive, especially combined with a heated bed at around 90 ºC and an enclosed chamber. Poor adhesion with ABS almost always ends in warping or internal stresses that can seriously affect the part.
