Motor control method in recording apparatus and recording apparatus
AssigneeSeiko Epson Corporation
InventorSumito Anzai
Life of this patent
Estimating the term…
Abstract
A unit heat value Qpass (=Ipass2·tpass) per pass is calculated from a current value (an effective current value) Ipass of a carriage motor with one pass of a carriage (one-way running in a reciprocation) and a moving time (a motor driving time) tpass of the carriage. Then, the unit heat value Qpass is successively calculated to obtain a heat value Qsigma for a unit time Tbox(=one minute). The heat value Qsigma is converted into a heat generation temperature ΔTnew. The heat generation temperature ΔTnew is successively added in consideration of a spontaneous radiation with the passage of time to obtain a current heat generation temperature ΔTsum (ΔTsum=K·ΔTsum+ΔTnew; K is a radiation factor). When ΔTsum exceeds a threshold, a pause time for one pass of the carriage is provided.
Claims21
A motor control method in a recording apparatus comprising an electric motor to be driven based on a power supplied from power supply means, comprising the steps of:
- successively obtaining a value related to a heat value based on a consumed current and a driving time of the electric motor;
- successively obtaining a value related to a heat storage amount of the electric motor in consideration of a radiation by using the value related to the heat value;
- and
- controlling the electric motor to take a pause at an interval of a driving operation thereof based on the value related to the heat storage amount.
A motor control apparatus in a recording apparatus comprising an electric motor to be driven based on a power supplied from power supply means, comprising:
- heat value acquiring means for successively obtaining a value related to a heat value based on a consumed current and a driving time of the electric motor;
- heat storage amount acquiring means for successively obtaining a value related to a heat storage amount of the electric motor in consideration of a radiation by using the value related to the heat value;
- and
- pause control means for controlling the electric motor to take a pause at an interval of a driving operation thereof based on the value related to the heat storage amount.
A motor control apparatus in a recording apparatus comprising an electric motor to be driven based on a power supplied from power supply means, comprising:
- heat value acquiring means for obtaining a value related to a heat value based on a consumed current and a driving time of the electric motor;
- heat storage amount acquiring means for obtaining a value related to a last heat storage amount in consideration of a radiation by using the value related to the heat value and for adding a value related to a heat value obtained next time by the heat value acquiring means to the value related to the last heat storage amount, thereby obtaining a value related to a present heat storage amount;
- and
- pause control means for controlling the electric motor to take a pause at an interval of a driving operation thereof based on the value related to the present heat storage amount.
A motor control apparatus in a recording apparatus comprising an electric motor to be driven based on a power supplied from power supply means, comprising:
- heat value acquiring means for obtaining a heat value based on a consumed current and a driving time of the electric motor;
- adding means for obtaining an added value of the heat value with a correcting operation in consideration of a radiation with the passage of time;
- and
- pause control means for controlling the electric motor to take a pause at an interval of a driving operation thereof when the added value exceeds a predetermined threshold.
A motor control apparatus in a recording apparatus comprising an electric motor to be driven based on a power supplied from power supply means, comprising:
- heat generation temperature estimating means for obtaining a value related to a heat value based on a consumed current and a driving time of the electric motor and for adding the value related to the heat value with a correcting operation in consideration of a radiation, thereby estimating a value related to a heat generation temperature of the electric motor based on the added value,
- wherein the electric motor is controlled to take a pause at an interval of a driving operation when the value related to the heat generation temperature exceeds a predetermined threshold.
A serial type recording apparatus in which a carriage including a recording head is reciprocated in a main scanning direction, thereby carrying out recording over a recording medium by the recording head, comprising:
- an electric motor to be driven for reciprocating the carriage in the main scanning direction;
- heat value acquiring means for calculating a heat value per unit time based on a consumed current and a driving time of the electric motor;
- and
- pause control means for successively adding the heat value per unit time with a correcting operation in consideration of a radiation with the passage of time to obtain an added value and for controlling the electric motor to take a pause time during an inversion of a movement of the carriage when the added value exceeds a predetermined threshold.
A serial type recording apparatus in which a carriage including a recording head is reciprocated in a main scanning direction, thereby carrying out recording over a recording medium by the recording head, comprising:
- an electric motor to be driven for reciprocating the carriage in the main scanning direction;
- unit heat value acquiring means for calculating a unit heat value per pass of the carriage based on a consumed current and a driving time of the electric motor;
- heat value acquiring means for successively adding the unit heat value to obtain a heat value per unit time;
- and
- pause control means for successively adding the heat value per unit time with a correcting operation in consideration of a radiation with the passage of time to obtain an added value and for controlling the electric motor to take a pause time at an interval between passes of the carriage when the added value exceeds a predetermined threshold.
A serial type recording apparatus in which a carriage having a recording head is reciprocated in a main scanning direction, thereby carrying out recording over a recording medium by the recording head, comprising:
- an electric motor to be driven for reciprocating the carriage in the main scanning direction;
- heat value acquiring means for calculating a heat value per unit time based on a consumed current and a driving time of the electric motor;
- and
- temperature estimating means for successively adding the heat value per unit time with a correcting operation in consideration of a radiation with the passage of time to obtain an added value and for estimating a heat generation temperature of the electric motor based on the added value.
A serial type recording apparatus in which a carriage having a recording head is reciprocated in a main scanning direction, thereby carrying out recording over a recording medium by the recording head, comprising:
- an electric motor to be driven for reciprocating the carriage in the main scanning direction;
- unit heat value acquiring means for calculating a unit heat value per pass of the carriage based on a consumed current and a driving time of the electric motor;
- heat value acquiring means for successively adding the unit heat value to obtain a heat value per unit time;
- and
- temperature estimating means for successively adding the heat value per unit time with a correcting operation in consideration of a radiation with the passage of time to obtain an added value and for estimating a heat generation temperature of the electric motor based on the added value.
A serial type recording apparatus in which a carriage having a recording head is reciprocated in a main scanning direction, thereby carrying out recording over a recording medium by the recording head, comprising:
- an electric motor to be driven for reciprocating the carriage in the main scanning direction;
- unit heat value acquiring means for calculating a unit heat value per pass of the carriage based on a consumed current and a driving time of the electric motor;
- heat value acquiring means for successively adding the unit heat value to obtain a heat value per unit time;
- and
- heat generation abnormality deciding means for deciding a heat generation abnormality when an added value obtained by successively adding the heat value per unit time with a correcting operation in consideration of a radiation with the passage of time exceeds a predetermined threshold.
Dependencies are inferred from the claim text.