I am a starter in this field.
i am using a arduino uno and L298N motor drive controller to control a stepper motor. i am wondering how can I insert the capacitive touch as the switch for the stepper motor to go ,after some time stop and if touch when moving will stop?
You need a variable - let's call it runMotor - which is normally false.
If it is false then the motor does not move.
When you touch the sensor it changes the variable to true - which allows the motor to run. When the motor finishes its run it sets the variable back to false.
Stepper Motor Basics
Simple Stepper Code
also look up the AccelStepper library