Another motorized Marble Machine #3

thingiverse

Another motorized variant of Tulio Laanens fabulous Marble Machine #3. This motorized version uses an inexpensive pancake style geared synchronous AC motor with a 7mm shaft and a flat surface. These motors are available in various voltages and RPM ratings, making them suitable for different applications. For safety reasons, it is recommended to use a low voltage AC wall wart, such as a 12V AC supply, and select a motor accordingly. The base has a hole that fits a standard panel mount DC connector, which requires a 10.9mm hole. The motors come with different gearing options, which will determine the feed rate. A 30 RPM rating was chosen, but users can opt for slower or faster speeds, depending on their preferences. The motor must rotate clockwise. For those interested in purchasing this type of motor, it is available at http://www.ebay.com/itm/AC5V-6V-9V-12V-24V-110V-220V-TYC-Plastic-Gear-Synchronous-Reduction-Gear-Motor-S/231968344955. If the track has already been printed, there is no need to reprint it. To motorize the machine, simply drill a 10mm hole in the middle of the bottom plate. However, it is suggested that users print a new spiral for optimal results. Three variants with different tolerances for the motor axle press fit are available, and starting with the middle one is recommended. A new top without the finger hole has also been created, but this is not essential.