What makes a machine a robot?

Answer 1

A robot is designed to automatically or remotely manipulate an object or objects by mimicking a human movement. The robot is either built to be stronger, less susceptible to damage, steadier, or built to withstand tedious repetition.

In simple terms a machine has moving parts that redirects energy like a car or pinball game. A robot is a specific type of machine designed to manipulate its environment on its own. Machines should not be confused with electronics like computers which have no moving parts but in common usage are considered machines because electronics often have internal machinery and vice versa.

Answer 2

It's movements and other controls are machine based.