3D Printing 101: Part 2a: Delta Robot Mechanics - CNCCookbook: Be A Better CNC'er
Delta geometry - RepRap
See How This Intricate, 3D Printed Mechanical Calculator Works - Make:
Arm length calculation help on own-design delta needed
Top View of 3D Model of the House Printed on a 3D Printer with White Filament by FDM Technology and Calculator. Stock Photo - Image of ruler, print: 220627460
algorithm - How are delta movements calculated? - 3D Printing Stack Exchange