Aarduino computer parts cnc

Hello I am working on a new project which I call computer parts CNC. The basic design calls for three stepper motor driven carriage assemblies from old disk drives that I found laying around. The project’s only expense for me was the three h-bridge chips that I will have to order which are only 15$. My first attempt at this project failed because of the expenses that came with it for all the wood, threaded rod, electronics, and other things that I failed to complete it. This time I was in a mission to cut costs and did so by using salvaged parts from a computer tower I got for 10$ at a garage sail a long tome ago, I took the carriages out of the disk drives and connected the carriages for the x and y assesses together as shown in this picture.