By adopting a polar coordinate system, rotation, and retraction steps, the manufacturing of these structures can be easy achieved." Many advanced 3D printing techniques, with fast printing speed ...

Instead, [MrDadVs] effectively built a polar-coordinate plotter to make chalk pictures on the ground. AP has a arm loaded with a custom liquid chalk delivery system for marking the pavement.

Exactly when that will happen is being influenced by humans, according to a new study, as melting polar ice alters the Earth’s rotation and changes time itself. The hours and minutes that ...

and finally an encoder was added to the base of the plotter to more accurately correct positional errors in the rotating arm mechanism. With everything said and done, the polar coordinate plotter ...

Scientists anticipate that a “negative leap second” might soon be required, shortening our days by a second, due to polar ice melting. Historically, Earth has seen its rotation decelerate due ...