MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.
Do you know you can control servos directly from rasperry pi ? Check this link: https://learn.adafruit.com/adafruits-raspberry-pi-lesson-8-using-a-servo-motor/overview
EDIT: I just saw that rasperry has only one hardware PWM pin. Software pwm could works but... it jitter. So, an arduino can does the job !