Here’s something we thought we’d never see: a robot that turns a computer drawing into a tattoo on the user’s arm.
The basic design of the robot is a frame that moves linearly along two axes, and rotates around a third. The tattoo design is imported into a 3D modeling program, and with the help of a few motors and microcontrollers a tattoo can be robotically inked on an arm.
Since the arm isn’t a regular surface, [Luke] needed a way to calibrate his forearm-drawing robot to the weird curves and bends of his ar. The solution to this problem is a simple calibration process where the mechanism scans along the length of [Luke]‘s arm, while the ‘depth’ servo is manually adjusted. This data is imported into Rhino 3D and the robot takes the curve of the arm into account when inking the new tat.
via Hack a Day
