CNC machining ABS, while offering numerous advantages, presents specific challenges:

l Heat Generation: ABS has a lower melting point compared to some other plastics. The friction generated during machining can cause the material to heat up rapidly, leading to tool wear, melting, and dimensional inaccuracies.  

l Chip Management: ABS produces long, stringy chips that can clog the machine and impede cutting. Efficient chip removal is crucial for preventing tool breakage and ensuring consistent part quality.

l Material Build-up: The tendency of ABS to build up on cutting tools can reduce tool life and impair surface finish. Regular tool cleaning is essential.

l Distortion: Due to its thermoplastic nature, ABS can distort under heat, affecting part dimensions and accuracy. Proper clamping and cooling are necessary to minimize this issue.

l Surface Finish: Achieving a consistent, high-quality surface finish on ABS can be challenging due to factors like tool wear, chip removal, and material properties.  

Addressing these challenges requires careful consideration of cutting parameters, tool selection, and machine setup.