Including the following aspects:

1. The geometry and dimensional accuracy problems

Dimensional deviation: During the printing process, the mechanical movement precision of the equipment, the shrinkage characteristics of the material and the process parameter settings and other factors may lead to dimensional deviation.

Shape distortion: The distorted shape will make the printed part does not meet the design requirements, reducing its mechanical properties and use of performance.

Surface roughness problem: Higher surface roughness will affect the appearance quality of the printed part in the application scenario that requires good surface finish.

2. Internal quality issues

Porosity: Porosity reduces the density of the printed part, which in turn affects its mechanical properties, such as strength, hardness and toughness.

Internal stress and cracks: Internal cracks can seriously weaken the strength and reliability of the printed part, increasing the risk of fracture of the printed part during use.

Uneven micro-structure: Uneven micro-structure can lead to inconsistencies in the mechanical properties of various parts of the printed part, such as variations in properties like hardness, strength and ductility in different regions.