So you would like to have a robot to make you a sandwich and respond to your voice commands? It’s nice to know that a few people are already working on these ideas. Take Sandwich-o-matic for instance. It is a fully-automated, voice-controlled sandwich maker that accepts your order and makes them for you.
The developers used servos for the moving parts and a DC motor to pull the toaster sideways. All are controlled using a Photon and an Arduino. It is not perfect, but the robot can actually make sandwiches if you have the right ingredients loaded.