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Figure 9: Top portion of the linear actuator
The base of the actuator (2) shows two separately laser cut pieces of baltic birch wood glued together which was then glued to the base board. The extruding wall of base (2) had three laser cut hole that were cut in a manner that the wooden dowel (1) and the steel shafts (3) rotate freely within. The wooden dowel was fastened as a press fit into the 3D printed flange (4). This flange was glued onto the servo horn (5). The the servo horn was threaded to fit onto the servo. The servo was fitted into the white 3D printed servo holder (6). This holder was 3D printed to the same tolerance as stated before so that it could slide freely on the steel rods (3).
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Figure 10: Bottom portion of the linear actuator
A 11 mm diameter ball bearing was fastened by press fit into the laser cut link (1) as well as glued. This ball bearing would be press fit around what would later become a wooden dowel at (2) instead of the 3D printed extrusion. An additional ball bearing of the same dimensions was press fitted into the other hole in link (1) (not visible). Links (1) and (5) were connected by a cut wooden dowel of the same dowel mentioned for Figures 7 and 8. Link (5) would later be connected to the servo (6) by a steel servo horn (not shown), not by our original idea of a threading press fit. A small screw fastened link (5) to the servo horn (not shown). The base board and the wooden base of the linear actuator had a rectangular hole laser cut to allow the servo to be pressed almost all the way through the board.
Figure 11: avocado Avocado grip and holder
Not shown in Figure 6, this holder consists of five pieces of laser cut wood, with the fifth piece not shown in Figure 11. This last piece not shown was glued not only to the base board, but also to the edges of the walls and base of the grip.