Third Iteration Bingo Spinner 3D Printed
Tolerances fit to a high degree of precision and gears mesh and turn perfectly.
Third Iteration Cog Test Pieces.
Third CAD Iteration of Bingo Spinner.
Second Iteration Bingo Spinner Issues Discovered After Printing.
Cam belt system was inoperative as there was too much friction between the cam belts and cam wheels for them to spin
Second CAD Iteration of Bingo Spinner and Stand.
– Top axle was redesigned to be much thicker so as not to be so fragile. – Side locators were disposed of as the male and female locators at the bottom of each piece were sufficient. – The tolerance between the wheels and axles made larger to ensure both cam wheels could spin freely. This was done by extrude cutting a 1mm larger diameter centre hole on both cam wheels on Solidworks.
Stand was redesigned to be adjustable instead of one fixed piece as a preexisting bingo tombola ball was bought
Cam wheels were made with concave edges so that cam belts wouldn’t slip off
Cam wheels were made with concave edges so the cam belts wouldn’t slip off.
First Iteration Bingo Spinner Issues Discovered After Printing.
First iteration cam wheel tolerances were too tight so they didn’t spin freely. Also top axel was too thin so it broke as it was too fragile.
Male and female locators were so small they weren’t even printed.
Test Pieces for Housing
I 3D printed small sections of the housing body of the Bingo Spinner to test how they fitted to the deconstructed housing of the dynamo torch. This was done as opposed to 3D printing the whole body of the Bingo Spinner so as to not waste material if the fitting was not correct.
First CAD Iteration of Bingo Spinner Housing and Stand.
To make the ‘bingo spinner’ I planned to use the housing and mechanism from a squeezable dynamo to covert the squeezing action on the grip to rotational movement. This rotational movement would be transferred to the bingo tombola wheel via a set of cam wheels and belts seated in an adjoining housing.
