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System and method for controlling current provided to a stepping motor

  • US 7,338,260 B2
  • Filed: 03/17/2004
  • Issued: 03/04/2008
  • Est. Priority Date: 03/17/2004
  • Status: Active Grant
First Claim
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1. A method for driving an infusion pump motor, the method comprising the steps of:

  • determining a position in a pump cycle;

    determining a flow rate; and

    adjusting an electrical current value for driving an infusion pump stepper motor in response, at least in part, to the position in the pump cycle and the flow rate as separate factors, wherein the steps of determining are accomplished at least 200 times per revolution of the stepper motor, and wherein the position in the pump cycle and an expected electrical current value are related to each other in a relational database.

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