(Solved): A prototype of a tube with a square cross section is to be fabricated using stereolithography. The ...

A prototype of a tube with a square cross section is to be fabricated using stereolithography. The outside dimension of the square = 90 mm and the inside dimension = 80 mm (wall thickness = 5 mm except at corners). The height of the tube (z-direction) = 50 mm. Layer thickness = 0.25 mm. The diameter of the laser beam ("spot size") = 0.20 mm, and the beam is moved across the surface of the photopolymer at a velocity of 600 mm/s. 90 mm 80 mm a) Compute the time required to build the part, if 10 s are needed for each layer to lower the height of the platform that holds the part. Neglect the time for postcuring. [1.5] b) If the same prototype is printed using solid ground curing, estimate the time needed to build the part assuming that it takes 3 s to harden each layer and 10s to reposition between layers. [1.0]