1?the driver manual just show me how to connect 1 motor which trough RX TX (in Arduino Duemilanove only have 1 RX TX, how connect if i wan use trough PWN pin)
2) how to control them after connection?(programing)
if can please told me step by step(im new for arduino)---thx very much
hang5043:
thx for ur suggestion ..but the electronic part different with what i gonna to use
I guess you got some homework to do, then!
No one is going to do your project for you. You need to spend a little time thinking about what you want to do, what are the essentials and what are the nice-to-haves, and then work from there. Come back here to ask specific questions about aspects of something you have tried already.
My advice is to prototype as you go, building things up on pieces. The link you were given is a great start because it shows you what you have to care about to make a basic CNC device.
Hint: asking for help on a forum is not the same as doing research or making progress on a project you will be graded on. What you are choosing to do can be a very large project, and there is a long road between idea and a working device. But it can be done.
A hint for your motor drivers: Although they have a UART interface I would not recommend to use it because your Arduino has only one of them in hardware and you would have to emulate the rest in software which is tedious and error prone. The drivers have a simple interface where you choose the direction with one pin and pulse the other pin for step to be done. Because the also have an enable pin you can multiplex the other two pins. This way you need 5 digital IO pins on your Arduino to drive the 3 motors or 6 (to 9) if you don't wanna multiplex. It's in the user manual on page 12.
..but the electronic part different with what i gonna to use