How long would it take to fabricate this hollow pyramid using FDM? The square ba

Question

How long would it take to fabricate this hollow pyramid using FDM? The square base has a side length of 10 cm and the pyramid is 10 cm tall. The interior cavity is also a pyramid with a square base of 9 cm sides and a height of 9 cm. Assume the extrudate of ABS and support material both have a cross-section of 0.7 mm wide by 0.3 mm tall and is dispensed at a rate of 3.5 cm/sec. The stage takes 0.8 sec to move and it takes 5 sec to switch between materials. The support material has a volumetric fill ratio of 70 %. Volume of a pyramid = (s^2*h)/3.

Explanation / Answer

v=3.5cm/sec

D=.0.09cm

t=0.09cm

td=8+5s

V=(s2*h)/3=0.092*.09/3=0.000243

PART 1 TOP LAYER n1=1/.09=11.11

part 2 bottom layer n2=9/.09=100

TIME=V/(Dtv)+n1(.8)+n2(0.8+5)=0.000243/(0.02835)+11.11(.8)+100(0.8+5)

=0.000048139

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