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Infographic: If You Use Stepper Motors Are They Open or Closed Loop? (2014)
February 2014 Survey Results Show 53% of Respondents Use Closed-Loop Stepper Motors

An electronic survey of Control Design readers was conducted in February 2014 in order to identify usage and application trends in motion, drives and motor technology among the industrial machine builders that comprise Control Design's readership.
47% of respondents who use stepper motors use open-loop steppers; 53% use closed-loop.


http://www.controldesign.com/assets/...ves-motors.pdf