×

Stepping motor control system and method for controlling a stepping motor using closed and open loop controls

  • US 20070040529A1
  • Filed: 08/19/2005
  • Published: 02/22/2007
  • Est. Priority Date: 08/19/2005
  • Status: Abandoned Application
First Claim
Patent Images

1. A stepping motor control system, comprising:

  • a stepping motor with an encoder connected to said stepping motor;

    a current and phase compensation controller, which receives an output from said encoder, wherein said controller implements a lead angle compensation routine, microstepping and full-step motor driving modes during closed-loop driving of said stepping motor, and an open-loop position holding mode when said stepping motor is at rest;

    a trajectory generator for sending a velocity motion profile to said current and phase compensation controller, said motion profile having rest, acceleration and constant velocity stages, wherein when said stepping motor moves at a velocity lower than a predetermined velocity threshold, said stepping motor is operated in the microstepping driving mode, and when said stepping motor moves at a velocity above said velocity threshold, said stepping motor is operated in the full-step driving mode.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×