Method of calculating correction value and method of...

Electricity: motive power systems – Positional servo systems – 'reset' systems

Reexamination Certificate

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Details

C318S602000, C318S603000, C318S568220, C318S632000

Reexamination Certificate

active

07132814

ABSTRACT:
A correction value calculating method includes: preparing a printer including a motor, a PID control system for controlling the motor, and a memory for storing a correction value, the printer being configured to calculate a value of a current flowing through the motor based on the correction value and an output value of an integral element of the PID control system; obtaining in advance a relationship, for when a property of a motor fluctuates, between a correction value and a sum of an output value of the integral element when a motor is driven at a first velocity and an output value of the integral element when the motor is driven at a second velocity; driving the motor of the printer at the first velocity and measuring an output value of the integral element at that velocity; driving the motor of the printer at the second velocity and measuring an output value of the integral element at that velocity; and determining the correction value to be stored in the memory based on the relationship and a sum of the two measured output values.

REFERENCES:
patent: 6111384 (2000-08-01), Stagnitto
patent: 2004/0164691 (2004-08-01), Andoh et al.
patent: 2003-79172 (2003-03-01), None

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