Would it be possible to use one driver module for multiple stepper motors and which driver module would be suitable? How much would such robotic arm be able to hold in kg and use in terms of power?
How much would such robotic arm be able to hold in kg and use in terms of power?
That depends on the design of the robot arm, which in turn depends on your requirements, and the characteristics of the motors you select, which must also meet those requirements. NEMA 23 specifies only the size of the motor mounting plate.