While in a regular LCD or LED-based digital clock the 7 segments for each of the four digits are switched on and off, the segments of this clock physically pivot in and out of view with the help of 28 individually controlled servo motors.

If printed on a different printer, the mainspring, balance spring, and balance wheel should be adjusted for the new material properties. This fully 3D-printed clock is probably unlike any other digital clock you have seen. Additionally, all clearances between movable parts has been kept to at least 0.5 mm to prevent these parts from fusing together. From these, the elastic modulus has been taken to be 0.9 GPa, and the density to be 1 gm/cm^3. The material data needed to perform the calculations for the mainspring, balance spring, and balance wheel has been gathered from the data provided by Sinterit (see the first three entries in the reference section). This model has been designed with Sinterit's PA12 material in mind. However, I can't print it to physically test it, so if for some reason it doesn't work, feedback would be greatly appreciated so I can fix it. I have spent a great amount of time trying to ensure that this clock will actually work once it is printed, including designing and simulating the springs and clock movements. Then cross reference the letter that corresponds to that part. To my knowledge, this is the first fully-functional 3D printable clock that can be created in a single print! Locate the part you need in the Hermle 340-341 Clock Movement-Parts-Back-Diagram. To use, wind up the bottom spring in the direction of the arrows on the case.

A star and voronoi pattern adorns the face, giving the clock a touch of elegance. It features an open body to assist in powder removal and to display its inner movements. It is a single piece with no assembly required and will work as soon as all the powder is removed.

This fully-functional windup mechanical clock has been specifically designed to take advantage of and show off the capabilities of the Sinterit Lisa.

Thingiverse 3d clock assembly diagram