WISRD Research & Engineering Journal

Figure 15 . Left: Close-up of part of the rim and side of failed Lilypad 2 print. Middle: Partway through failed Lilypad 2 print. Right: Top view of failed Lilypad 2 print. It was determined that the best course of action would be to create an entirely new design that

would be easily printable. 3.3.3 Hog Slat Design

3.3.3.1 Hog Slat v.1

The next design was made by Toby (Fig. 16). It was named the Hog Slat, due to its appearance. A hog slat is essentially a flat, elongated concrete slab with grooves that hold food and water for pigs or hogs.

Figure 16. Left: Slicing Hog Slat design in Makerbot Print. Right: A commercial cement hog slat. The design is a rounded square with 4 lengthwise slots spaced between slats that are 16 mm thick. We could place and remove the ceramic plugs in these slots during experimentation and in situ . This version was designed with dimensions in multiples of 4 mm, as our extruder was 4.0 mm in diameter. It is 264 x 264 millimeters with 16 mm slots, and 40 mm tall. However, before our first print (Fig. 17), we changed it to be 16 mm tall thinking that 40 mm was impractical and a waste of materials. It would also be excessively deep for the plugs.

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