Pharmacy robot

Hi all, I would like to create a robot to 3 stepper motor and control via computer as well, we have a pharmacy robot based on the PIC controller shelf medication and should be controlled through a computer which is on the shelf what medicine I would have removed the PIC controller and place it would put Arduino atmega help needed

Sorry, but your post is too garbled for me to give any serious advise.
Please take some time to properly describe what you want to make,
what you tries so far,
what your code does (or not)
what you expected?
etc.
The more information you provide the better answers you can expect.

I have a robot to the PIC controller I'd like to do it on Arduino