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One of the main challenges of Large Scale 3D printing of high temperature thermoplastics is the control of the interface temperature – which determines the degree of bonding between consecutive layers. When the deposited material has cooled down in excess, poor adhesion is achieved between layers, leading to insufficient strength, delamination, cracking and part failure. If the material has not cooled down sufficiently, it won’t support the consecutive layers, therefore leading to print failure. The interface temperature control is especially important when attempting large scale prints and when processing semicrystalline thermoplastics.