$8.00Grasshopper clock

myminifactory

Grasshopper Escapement Clock Link to Instructions and 3D View Design inspired by John Harrison invention  https://en.wikipedia.org/wiki/John_Harrison He designed the grasshopper escapement as an attempt to improve the accuracy of clocks He also took on the challenge of designing a precise marine clockThe design of the escapement is closely similar to the dimensions and angles layed out by John Harrison, the size of the escape wheel is increased to 210 mm to allow for an easy print on a FDM printer The clock also includes a maintaining power spring to allow rewinding with the clock still beeing powerd by the spring  There is a fine tuning screw at the top of the clock that allows tunning the lenght of the pendulum with the clock running A set of instruction can be found here: Instructions There is a 3D view of the complete clock included with the files is a XHTML format, the file can be opened in a browser, Chrome, Safari, Edge Expect to spend a week or two to print all the parts Clock will run over 24 hours with a 1 meter drop of the weight It runs with an accuracy well under +/- 1 minute a day   Existing videos: https://youtu.be/TrXwS0jcLvQ https://youtu.be/JBG6zJk3xOo https://youtu.be/r_xHFzkSbGk   Supplies M3 screws and nuts bearings 605 rod 5 mm x 100 mm piano wire 2 mm 30 to 80 mm for shafts piano wire 1 mm for maintain spring piano wire 0.5 mm for suspension spring BB still ball to load the bob 10 mm dowell for the pendulum rod 3 to 4 Kg weight to power the clock