Hi, I have a project that requires me to use 3 NEMA 17 stepper motors. At the moment I have a motor shield (L293D1) running 2 of the steppers, but don't know how I will run the third motor. I have a L298N motor board, but dont know how I can connect it to the arduino and motor shield.
TIA 
An L298 is a poor choice for driving a stepper motor. Please post a link to the datasheet for your stepper motors if you want suggestions for a more suitable driver.
Each motor needs its own driver. An Arduino can easily control 3 stepper motors.
There's a multiplicity of L298N motor boards, which one? Schematic, datasheet, brand name, part number, user manual?
Info on motor, NEMA 17 only specs the mounting face dimensions, says nothing about number of phases, voltage, current requirements?
I have a NEMA 17 Stepper Motor Bipolar 4 Leads 34mm 12v 0.4a 26ncm(36.8oz.in) 3d Printer Motor 42shd0001.
This is the L298N Dual H Bridge DC Motor Driver IC that I have http://artofcircuits.com/product/l298n-motor-driver-board
abcrulz:
I have a NEMA 17 Stepper Motor Bipolar 4 Leads 34mm 12v 0.4a 26ncm(36.8oz.in) 3d Printer Motor 42shd0001.
This is the L298N Dual H Bridge DC Motor Driver IC that I have http://artofcircuits.com/product/l298n-motor-driver-board
I have three 12v 0.4amp motors attached to a small lathe and I drive them with Pololu A4988 stepper drivers and an 18v laptop power supply.
It would help if you post a link to the datasheet for your motors (as I requested). What does "34mm" refer to?
...R