John Harrison Grasshopper Escapement 3D Printed Clock

Get the files on My Mini Factory:
www.myminifact...
Design inspired by John Harrison invention
en.wikipedia.o...
He designed the grasshopper escapement as an attempt to improve the accuracy of clocks
He took on the challenge of designing a precise marine clock
The 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
Final release, a set of instruction and videos are coming
Included with the files is a Xhtml file that can be opened in a browser and gives you a 3D representation of the complete clock as an aid for building
expect to spend a week or two to print all the parts
Clock will run over 24 hours with a 1 meter drop
It runs with an accuracy well under +/- 1 minute a day
Existing videos:
• Completed prototype of...
• Design and Test run of...
• John Harrison Grasshop...
I did quite a few updates to the files, there should be all up to date
Supplies needed:
M3 screws and nuts
10x bearings 605
6x 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 steel ball to load the bob
10 mm dowels for the pendulum rod
3 to 4 Kg weight to power the clock
glue

[@janetmorris6792]

Well done it's started to be printed and near completion of your last model, have also printed out all the parts for you electric shelf clock

[@jeanclaudesalertimpression6277]

Bravo Jacques Superbe réalisation. Jean Claude

[@maneki9neko]

Big fun.

[@theofficialczex1708]

Amazing!

[@yakdaymar6659]

Wow

[@glaysonmestre]

how long does it work?

[@VladimirZhukovskii]

👍круто🤝

[@anthonyvallot1752]

Jacques, where do I get the SDL file to be able to make on of these clocks? tony

[@jacquesfavre999]

link in description