Power source for 2 Stepper Motors and 2 Servo motors using two different shields

Hi all,

I have a robotics project that involves the use of 2 stepper motors to drive the wheels of the robot while using 2 servos in controlling a crane arm. One stepper motor has a single axis which control the sideways motion of the robot and the other is an double axle stepper motor that controls the back wheels of the robot.
Steppers:
NEMA-17 Stepper Motor 40Ncm 1.8 deg step angle with 0.9A 3.96V for the sideways motion.
NEMA-17 Stepper Motor Dual Shaft 1.8 deg step angle with 26Ncm 0.4A 12V for the back wheels.

Servos:
RDS3115MG 17KG Digital Metal Gear Servo Dual Shaft 180° 270° Angle for RC which are used in controlling a crane arm.

The robot itself will not weigh more than 6 kg and I am planning to make it as light as possible. Now, the question is that I currently have one motor shield ( How to use the DFRobot 2A Motor Driver Shield ) that I think I can use to control the two servos for the arms but not too sure what to get for the stepper motors. I was thinking of using an Adafruit Motor Shield V2 from here: Overview | Adafruit Motor Shield V2 | Adafruit Learning System , is that feasible for this project or do I need to look for other motor controllers? Also, what kind of power source do I need to use for the motors? Is a typical battery pack used in RC cars okay or do I need to look for something else?

Any help on this is appreciated, thank you! :smiley:

Well, one of your steppers requires at least 12V, what is the voltage and current capability of "a typical battery pack used in RC cars"?

And servos don't usually need any shield. They can be controlled direct from digital pins.

Steve