Hi!
Better solution is to make stepper driver with L297 & L298. This chips are very popular and are not so expensive. They can be connected with your PC with only 2 or 3 wires and are controlled with Step/Dir signals. Show us your machine and your driver . Do you have some photos or sheets?
Greetings !

(sorry for my english )

Hi. You are 12 years old and your English is quite well! Where are you come from?
My english is very bad... but i try to help you. Look at this URL:
TurboCNC Phase Control
Look at the page number 4 and 5. There is a great example how to make own numerical controlled machine and how to set up TurboCNC with "Phase Control" mode.
Show us your machine ! Greetings !
Have fun !