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iZac's drink dispensing turntable

by nickjohnson, published

iZac's drink dispensing turntable by nickjohnson Nov 18, 2011

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Summary

A turntable for your very own drink-dispensing robot, and a pedestal to put the scale and drinks on.

These are the physical parts for my iZac drinkbot project, details of which you can find here: http://blog.notdot.net/2011/11/Introducing-iZac-the-Android-Bartender

Instructions

  1. Cut the pedestal from a sheet of 3mm acrylic, slot it together, and glue.
    a) Make sure to put the servo in the servo holder part (with the servo slotting in from the top, not the bottom) before you assemble and glue everything.
    b) There are two ways the legs can go together; I recommend having one long leg on each corner, instead of 2 corners with 2 legs and 2 with none.
    c) A laser cuttable servo horn, and a piece of retaining plastic to hold it on the servo are included. Screw two M2 screws through the servo horn so they face upwards, and secure them with bolts; these will act to couple the servo with the platform.
    d) Place the lazy susan bearing on top of the completed pedestal, and secure it with four short M3 machine screws and bolts. The screw heads should be on the lazy susan side, with the bolts underneath the pedestal top. You may want to ensure the four screws for the other side are already inserted in the other side of the lazy susan bearing before you do this.
  2. Cut the turntable top and mounting from another piece of acrylic. Assemble the mounting part and glue it together, but do not glue it to the turntable yet. Attach it to the lazy susan bearing on the pedestal, lining up the M2 scews from the servo horn with the slots in the mounting.
  3. Fit one of the sides onto the pedestal and glue it in place.
  4. Fit an adjacent side to the turntable so that the intersection of the sides forms a pinch valve mount. Insert the part of the modified pinch valve that fits the mounting, and glue everything in place.
  5. Repeat steps 4 and 5 for the other 4 sides and 2 pinch valves.
  6. Assemble the pinch valves around the part you already glued in place by following the instructions on the pinch valve page. Use machine screws and nuts to secure the valves; do not glue anything.
  7. Attach the air pump to the bottom of the turntable platform with a screw. The mounting may require modification for the exact design of air pump you are using.
  8. Fit the completed turntable onto the mounting and glue it into place if desired - it holds fairly well purely based on friction, however.
  9. Cut out and assemble the drink holder / scale unit in the obvious fashion. Attach a load cell and arduino / shield as desired.

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