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Table 4.1 Taguchi L8 design for CLFDM
4.6 Methodology
Trial No. Curvature Speed Deposition Style
1 1 Speed 1: low 1 - Flat layer
2 1 Speed 1: low 2 - Curved layer
3 1 Speed 2: high 1 - Flat layer
4 1 Speed 2: high 2 - Curved layer
5 2 Speed 1: low 1 - Flat layer
6 2 Speed 1: low 2 - Curved layer
7 2 Speed 2: high 1 - Flat layer
8 2 Speed 2: high 2 - Curved layer
A total of sixteen parts (8 parts x 2 batches) were printed as per Taguchi‟s L8 design,
repeating each of the trials shown in Table 4.1 twice, but during printing a number of
difficulties sprung while printing with the FDM test bed at hand. Some of these are
presented as follows:
Limited capability of the machine to accept a broad range of materials.
Materials had to be semi-solid and viscous in state which would enable easy
flow through the syringe.
Maintaining consistency of fabepoxy compound; Mixing of the epoxy and
hardener had to be very accurate in 1:1 ratio to ensure smooth flowing
material desired when the two materials were in tub form. The company
KraftBiz, which manufactured this compound later, introduced a gun barell
system which would then push out fab at home with the exact 1:1 composition
of epoxy and hardener straight into the syringe.
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