To guarantee adequate curing, each layer in a SLA process is twice scanned, once in x-direction and the other in y-direction (i.e., the WEAVE pattern). Today, we'll construct a cube of 25 x 25 x 25 (mm3) with 0.1 mm-thick layers. The laser system has a 0.50 mm beam diameter and 10 mW of power. For the chosen laser wavelength, the photopolymer has Dp = 0.075 mm and Ec = 11.4 mJ/cm2. (A) What scanning speed is required if the first pass (of the two scans in WEAVE) is to cure up to 0.075 mm? (b) If the second pass is performed with the same settings, what is the final cure depth? (Note that the layer thickness should be more than specified)

(c) If the spacing between two scanned lines in WEAVE is set to be 1 mil (0.025 mm), estimate the total time to make a layer (including both x- and y- passes).

(d) If ACES scanning is used in place of WEAVE and is only applied with x-direction, what is the scanning speed to achieve the same total depth as in (b)? Assume a hatch distance (hs) of 0.175 mm.

(e) Calculate the total times of ACES to make a layer

Answer rating: 100% (QA)

Lets break down the solution step by step Part A Scanning speed required to cure up to 0075 mm We need to calculate the scanning speed V in mms to cur... View the full answer