Stepper motor control system which uses pulse frequencies that vary according to a non-liner curve
First Claim
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1. A stepping motor control system comprising:
- a stepping motor;
a driving circuit for exciting phases of said stepping motor; and
a control circuit for transferring data corresponding to predetermined stepping motor driving curve to said driving circuit,wherein the driving curve is formed by an Nth-order specific formula having at least two inflection points,said Nth-order specific formula being given by;
space="preserve" listing-type="equation">f(t)=at.sup.n-1 (t-b)+f.sub.L where f(t) is the frequency, t is time, a and b are variables, and fT is the start or stop frequency,said control circuit being constructed to calculate the variables a and b from said specific formula based on a given start or stop frequency, a constant frequency and a rising Pulse to obtain an excellent drive curve from the specific formula.
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Abstract
A stepping motor control system for a recording apparatus which uses a stepping motor as a driving source of a carriage with a recording head, has a stepping motor driving circuit for exciting the phases of the stepping motor, and a control circuit for transferring data corresponding to a predetermined stepping motor driving curve to the driving circuit, so as to easily obtain a stepping motor driving curve that can suppress vibrations, and the driving curve is formed from an Nth-order specific formula having two or more inflection points.
42 Citations
6 Claims
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1. A stepping motor control system comprising:
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a stepping motor; a driving circuit for exciting phases of said stepping motor; and a control circuit for transferring data corresponding to predetermined stepping motor driving curve to said driving circuit, wherein the driving curve is formed by an Nth-order specific formula having at least two inflection points, said Nth-order specific formula being given by;
space="preserve" listing-type="equation">f(t)=at.sup.n-1 (t-b)+f.sub.Lwhere f(t) is the frequency, t is time, a and b are variables, and fT is the start or stop frequency, said control circuit being constructed to calculate the variables a and b from said specific formula based on a given start or stop frequency, a constant frequency and a rising Pulse to obtain an excellent drive curve from the specific formula. - View Dependent Claims (2, 3, 4, 5)
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6. A stepping motor control system for a recording apparatus, comprising:
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a stepping motor serving as a driving source of a driving system of the recording apparatus; a driving circuit for exciting phases of said stepping motor; and a control circuit for transferring data corresponding to a predetermined stepping motor driving curve to said driving circuit, wherein the driving curve is formed by an Nth-order specific formula having at least two inflection points, which formula is given by;
space="preserve" listing-type="equation">f(t)=at.sup.N-1 (t-b)+f.sub.Lwhere f(t) is the frequency, t is time, a and b are variables, and fL is the start or stop frequency, said control circuit being constructed to calculate the variables a and b from said specific formula based on a given start or stop frequency, a constant frequency and a rising pulse to obtain an excellent drive curve from the specific formula.
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Specification
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsYanagi, Haruyuki, Shinmachi, Masaya, Kawarama, Makoto
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Primary Examiner(s)SALATA, ANTHONY J
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Application NumberUS08/886,893Time in Patent Office636 DaysField of Search318/696, 318/685, 318/254, 318/701, 318/138US Class Current318/696CPC Class CodesB41J 19/202 Drive control means for car...H02P 8/14 Arrangements for controllin...H02P 8/32 Reducing overshoot or oscil...
