Let me first say there are many ways to build this claw machine. Total time with building, wiring, designing (2D + 3D CAD, PCB layout) for both v1 and 2 machines is likely near 300 hours. No part of my claw machine came from any 'kit'. I was able to play this machine at a Coin-Op Museum in Hopewell PA.

The goal is to load diecast 'junk' cars into a hopper.

The last photo is a fully restored Junkyard game from the 1960's as example. Personally, I think they are incredibly fun not to mention charming in their ingenuity. Really early crane amusement machines were based on full control machines. Personally, the game is more fun since it's based less on one-time spatial judgment and more about motor skills and planning the best route for multiple prizes. Unlike the traditional Arcade claw machines, my DIY version gives you full control over this claw in the X,Y,Z axis and the claw grip itself. Once time runs out the claw closes, the gantry moves back to the 'home position' and the claw then opens dropping anything it might be carrying. You have 55 seconds to move and position the claw, grab a prize, return it to the 'prize chute' and go for more. Insert a quarter (can be set to free-play), and press start. The game is based on a timer (there is an LCD indicating how much time is left) which is set to 55 seconds. The claw machine functions just like traditional claw machines in arcades, except my machine gives you more control and fairness.

Some parts are sourced from the plentiful DIY 3D printer market, other parts are custom 3D printed, and clever uses for 'that's not what that thing is designed for' complete the functionality of the machine. Stepper motors move the gantry and a servo motor controls the claw (giving the claw an analog grip, not just open/close). Footprint is ~20x26x19 inches, made from aluminum extrusion, custom laser cut acrylic/wood, stepper motors (Nema17) and an Arduino Mega. Machine is about 1:4 scale, perfect for candy and other small toys/prizes.

Build your own vending machine kit