CN113541541B - Control method and control system for image forming apparatus - Google Patents
Control method and control system for image forming apparatus Download PDFInfo
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- CN113541541B CN113541541B CN202010321067.0A CN202010321067A CN113541541B CN 113541541 B CN113541541 B CN 113541541B CN 202010321067 A CN202010321067 A CN 202010321067A CN 113541541 B CN113541541 B CN 113541541B
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- image forming
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- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000001514 detection method Methods 0.000 claims abstract description 19
- 239000002699 waste material Substances 0.000 description 13
- 230000002159 abnormal effect Effects 0.000 description 9
- 230000007423 decrease Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000003831 deregulation Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P8/00—Arrangements for controlling dynamo-electric motors of the kind having motors rotating step by step
- H02P8/12—Control or stabilisation of current
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J29/00—Details of, or accessories for, typewriters or selective printing mechanisms not otherwise provided for
- B41J29/38—Drives, motors, controls or automatic cut-off devices for the entire printing mechanism
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P8/00—Arrangements for controlling dynamo-electric motors of the kind having motors rotating step by step
- H02P8/34—Monitoring operation
Abstract
The invention provides a control method of an image forming apparatus and a control system of the image forming apparatus, which can control the driving current applied to a stepping motor, thereby realizing energy saving. The control method of the image forming apparatus includes the steps of: a detection step, detecting a parameter value of the stepping motor in a working state; a determination step of comparing the parameter value detected by the detection step with a threshold value corresponding to the parameter value stored in advance in the storage section, thereby determining whether the stepping motor is in a normal operation state; and a control step of controlling the drive current by the control unit so that the stepping motor is brought into a normal operation state when it is determined in the determination step that the stepping motor is not in the normal operation state.
Description
Technical Field
The present invention relates to a control method and a control system for an image forming apparatus, and more particularly, to a control method and a control system for an image forming apparatus capable of achieving power saving.
Background
In a compound printer, for example, there is a case where torque output from a motor is insufficient and the motor is off-regulated. In such a case, a larger current than usual needs to be applied to the motor to overcome the run-out, thereby ensuring that the motor can function properly.
In contrast, in a conventional compound printer, for example, a drive current larger than that in normal operation is generally set for a stepping motor in the compound printer. Therefore, the problem that the motor is out of regulation due to insufficient torque output by the motor is solved.
However, in the above-described complex printer, since the motor is always driven with a current larger than that in normal operation of the motor, a current larger than that required is used for a long period of time, resulting in waste of energy, which is disadvantageous in energy saving. Moreover, the use of a larger current can cause the temperature of the device to rise too quickly, which is detrimental to the service life of the device.
Disclosure of Invention
The present invention has been made in view of the above circumstances, and an object thereof is to provide a control method and a control system for an image forming apparatus capable of achieving energy saving.
In order to achieve the above object, a control method of an image forming apparatus according to the present invention is a control method of controlling a drive current applied to a stepping motor, the control method comprising: a detection step, detecting a parameter value of the stepping motor in a working state; a determination step of comparing the parameter value detected by the detection step with a threshold value corresponding to the parameter value stored in advance in a storage unit, thereby determining whether the stepping motor is in a normal operation state; and a control step of changing the drive current by a control unit so that the stepping motor is in a normal operation state when it is determined in the determination step that the stepping motor is not in the normal operation state.
According to the control method of the image forming apparatus, when it is determined that the stepping motor is not in the normal operation state, the control unit can control the drive current so that the stepping motor is in the normal operation state. Therefore, abnormal states (such as desuned) of the stepping motor can be timely dealt with, and normal operation of the device is ensured. Further, since the drive current is changed only when it is determined that the stepping motor is not in the normal operation state, the state in which the stepping motor is not turned off can be maintained without setting the drive current to a large current as in the conventional case. Therefore, the device can save energy, is not easy to generate heat too fast, and is beneficial to the service life of the device.
In the control method of the image forming apparatus according to the present invention, the detection step may detect the vibration amount of the stepping motor as a parameter value, and when it is determined in the determination step that the detected vibration amount is larger than the vibration amount stored in the storage unit in advance as the threshold value, it may be determined that the stepping motor is not in a normal operation state, and in the control step, a driving current larger than the driving current in a state where the stepping motor is normally operated may be applied to the stepping motor by the control unit.
According to the above control method, the vibration amount of the stepping motor is detected as a parameter value. Since vibration is generally generated when the stepping motor is out of tuning, the state of the stepping motor can be grasped more accurately by detecting the vibration amount of the stepping motor. In addition, when the vibration amount is larger than the threshold value, a current larger than that in normal operation is applied to the stepping motor to overcome the shortage of torque, thereby bringing the stepping motor into a normal operation state. In this way, as described above, a large current can be applied to the stepping motor only when the torque generated by the stepping motor is insufficient, and therefore, the waste of power resources can be suppressed, the device can be made energy-saving, the device is not easily heated too quickly, and the service life of the device is facilitated.
In the control method of the image forming apparatus of the present invention, the drive current in the normal operation state of the stepping motor is set so that the output torque of the stepping motor is equal to the load on the paper path.
According to the control method, the driving current of the stepping motor in a normal working state can be the minimum current required. Therefore, the waste of power resources can be further suppressed, and the device can be energy-saving.
In the control method of the image forming apparatus according to the present invention, the control unit does not change the driving current when the vibration amount is equal to or less than the threshold value +10%.
According to the above control method, the threshold value can be set according to the vibration amount of the normal operation state of the stepping motor. In addition, when the vibration amount of the stepping motor is equal to or less than the threshold value +10%, the vibration amount in the normal operation state may be exceeded, but the vibration amount in the normal operation state is not constant, and there is also a case where a slight vibration is caused by other factors, and even in such a case, the stepping motor can satisfy the torque output, and an excessive load is not imposed on the stepping motor, so that it is not necessary to apply a larger current to the stepping motor. Thus, the operating state of the stepping motor can be accurately determined, and the driving current can be reasonably controlled, so that the waste of power resources is suppressed, and the device is energy-saving.
In the control method of the image forming apparatus according to the present invention, the control unit does not change the driving current when the vibration amount exceeds the threshold +20%.
According to the control method described above, in the case where the vibration amount exceeds the threshold value ±20%, although it is determined that the stepping motor is not in a normal operation state, such a large vibration amount is considered to be highly likely to be caused by the outside world. Therefore, in such a case, the drive current is not increased. In this way, it is possible to accurately determine whether or not the stepping motor is vibrating due to the problem of the overshoot, and therefore, the driving current can be reasonably controlled, and the waste of power resources can be suppressed, thereby saving energy in the device.
In the control method of the image forming apparatus according to the present invention, the control unit divides the driving current into a plurality of stages, and controls the driving current so as to change the driving current stage by stage.
According to the control method, the drive current can be increased in stages, so that the application of an excessive drive current to the stepping motor is avoided, and the drive current can be changed appropriately according to the operating state of the stepping motor. Therefore, the waste of power resources can be further suppressed, and the device can be made energy-saving. And the damage of the stepping motor or the device caused by overlarge current can be avoided, and the service life of the device is ensured.
In the control method of the image forming apparatus according to the present invention, the control unit changes the drive current and then decreases the drive current at constant intervals until the drive current reaches the drive current in a normal operation state of the stepping motor.
According to the control method, when the stepping motor is judged not to be in a normal working state and the disconnection occurs, the stepping motor ensures the output torque to overcome the disconnection after the output torque is increased by applying larger driving current to the stepping motor. Then, the drive current is reduced by one stage at intervals of a constant time, so that the increased drive current is not required to be maintained, and the drive current can be restored to the current in the normal operation state after the shortage of the output torque is overcome, thereby avoiding the waste of electric power resources and saving energy of the device. In addition, the driving current is reduced section by section, and the driving current is prevented from being changed excessively, so that the service life of the device is prolonged.
In the control method of the image forming apparatus according to the present invention, the stepping motor is a stepping motor on a paper path of the image forming apparatus.
The problem of insufficient output torque occurs most easily due to the stepping motor located on the paper path. Therefore, the stepping motor on the paper path is used as a control object, the problem of insufficient output torque can be effectively solved, and the control method is simple and easy to realize.
In the control method of the image forming apparatus of the present invention, the vibration amount is vibration amounts in a plurality of directions when the stepping motor vibrates.
According to the detection of the vibration amounts in a plurality of directions when the stepping motor vibrates, the working state of the stepping motor can be more accurately grasped, and the driving current can be accurately and reasonably controlled, so that the waste of electric power resources is further effectively restrained.
Further, the control system of the image forming apparatus according to the present invention can obtain the above-described technical effects by providing each portion.
According to the above-described aspects, a control method and a control system for an image forming apparatus capable of achieving energy saving can be provided.
Drawings
Fig. 1 shows a graph of vibration amounts of a stepping motor in different states.
Fig. 2 is a main part of a circuit diagram showing an example of controlling the drive current.
Fig. 3 is a flowchart showing a control method of the image forming apparatus of the present invention.
Detailed Description
Hereinafter, a control method of an image forming apparatus according to the present invention will be described in detail with reference to the accompanying drawings.
In an image forming apparatus, a sheet is conveyed through a certain path, an image is fixed to the sheet at, for example, a fixing portion, and then the sheet printed with the image is output to the outside of the apparatus for use, reading, and the like by a user. In general, the conveyance of the paper is performed by a roller or the like, and a stepping motor is often used to drive the roller. In a state where the apparatus is normally operated, the stepping motor is operated by a certain drive current to drive the roller member. However, the output torque is insufficient due to various reasons, and the stepping motor is not adjusted, so that the roller cannot be driven effectively. In this case, the present invention can control the drive current applied to the stepping motor, and adjust the drive current to ensure a sufficiently large torque output, thereby preventing the stepping motor from operating normally in a disengaged state.
Specifically, the control method of the image forming apparatus of the present invention can be implemented as follows. The control method of the image forming apparatus of the present invention at least includes a detection step, a determination step, and a control step. First, in the detecting step, a parameter value in an operating state of the stepping motor is detected. Here, the measured parameter is set to be the vibration amount of the stepping motor, and since vibration is generally generated when the stepping motor is off-set, the state of the stepping motor can be grasped more accurately by detecting the vibration amount of the stepping motor. However, the measurement parameter is not limited to the vibration amount of the stepping motor, and for example, the rotation frequency of the stepping motor may be detected as a parameter value. That is, the parameter of the stepper motor which changes during the normal operation compared to the de-tuning can be used as the measured parameter value.
Next, in the determining step, the parameter value detected in the detecting step is compared with a threshold value corresponding to the parameter value stored in advance in a storage unit, and it is determined whether or not the stepping motor is in a normal operation state.
Specifically, in the present embodiment, the vibration amount of the stepping motor in the state where the image forming apparatus mounted with the stepping motor is normally operated, that is, in the state where the stepping motor is normally operated is measured in advance and stored in the storage unit. The storage unit is constituted by a storage medium capable of recording data. The storage medium may also store a program that can be read by the control unit and used to control the stepping motor and its driving current, for example.
The vibration sensor detects the vibration quantity of the stepping motor in the current working state, and converts the vibration quantity into an electric signal to be input to the judging part. The determination unit is configured by, for example, a microcomputer, and compares the input signal from the vibration sensor with the vibration amount of the stepping motor in the normal operation state stored in the storage unit in advance, and here, the vibration amount of the stepping motor in the normal operation state is set to a and is set as a threshold value. By comparing the vibration amount detected from the vibration sensor with the threshold value a, it is possible to determine that the stepping motor is in a normal operation state when the detected vibration amount is equal to or smaller than the threshold value a, and to determine that the stepping motor is not in a normal operation state, that is, in an abnormal operation state, when the detected vibration amount exceeds the threshold value.
Then, in the control step, when it is determined in the determination step that the stepping motor is not in the normal operation state, that is, in the abnormal operation state, the driving current is changed by the control unit so that the stepping motor is in the normal operation state.
Specifically, in the present embodiment, the magnitude of the drive current input to the stepping motor is controlled by the control unit. Since the control unit is constituted by a microcomputer, for example, in the present embodiment, the determination unit and the control unit may be constituted by a microcomputer, and the functions of the determination unit and the control unit may be realized by hardware, software, or a combination of hardware and software of the microcomputer. In a normal case, a driving current is inputted to a stepping motor to drive the stepping motor so as to rotate the roller. Here, the drive current in the normal operation state of the stepping motor is set so that the output torque of the stepping motor is equal to the load on the paper path. Thus, the driving current of the stepping motor in the normal working state can be the minimum current required, and the extra consumption of the electric power resource by the device can be restrained, so that the device can save energy.
When the determination unit determines that the stepping motor is in a normal operation state, the control unit does not change the drive current for driving the stepping motor. When the determination unit determines that the stepping motor is not in a normal operation state, that is, when the determination unit determines that the stepping motor is in an abnormal operation state, the control unit controls the driving current for driving the stepping motor, so that the driving current can be increased, that is, a current larger than the current (the minimum current required for the normal operation) is applied to the stepping motor to overcome the problem of insufficient output torque of the stepping motor, and the stepping motor is brought into the normal operation state again to avoid the occurrence of the overshoot.
Thus, through the series of actions, when the vibration quantity of the stepping motor is detected to be large and the abnormal operation state is judged, the driving current is immediately controlled, so that the stepping motor is prevented from generating the deregulation, the abnormal operation state of the stepping motor can be timely dealt with, and the normal operation of the device is ensured. Further, since the drive current is increased only when it is determined that the stepping motor is in an abnormal operation state, the drive current can be maintained in a state in which the stepping motor is not disengaged, unlike the conventional one, without setting the drive current to a large current at all times, and therefore, the device can be made energy-saving, and the device is not easily heated too quickly, which is advantageous for the service life of the device. In addition, the present embodiment detects the vibration amount of the stepping motor as a parameter value. Since vibration is generally generated when the stepping motor is off-regulated, the state of the stepping motor can be grasped more accurately by detecting the vibration amount of the stepping motor.
Here, in the control step, the control portion may not increase the driving current when the detected vibration amount is less than or equal to the threshold value a+10% in consideration of the fact that the vibration amount of the stepping motor in the normal operation state is not a constant amount and in consideration of the fact that other factors may cause a slight vibration.
In the above case, even if the vibration amount of the stepping motor exceeds the threshold a, the stepping motor can satisfy the torque output even in such a case, and does not put an excessive load on the stepping motor, so that it is not necessary to apply a larger current to the stepping motor. Thus, the operating state of the stepping motor can be more accurately determined, and the driving current can be reasonably controlled, so that the waste of electric power resources is suppressed, and the device is energy-saving.
Further, in the control method of an image forming apparatus according to the present invention, the control unit does not change the driving current when the vibration amount exceeds the threshold +20%.
As described above, there are many factors that cause the vibration of the stepping motor, and in the case where the vibration amount of the stepping motor exceeds the threshold value a±20%, it is considered that such a large vibration amount is highly likely to be caused by external vibration. Therefore, in such a case, although it is determined that the stepping motor is not in a normal operation state, the drive current is not increased uniformly. Since vibration generated from the outside cannot be overcome even if the driving current is increased to make the stepping motor normally operate. In such a case, for example, the user may be notified that the device receives external vibration and cannot operate normally by displaying or outputting sound.
In this way, when the vibration amount of the stepping motor is detected to exceed the threshold a±20%, the vibration of the stepping motor due to external vibration is considered, and at this time, the control section does not change the drive current. Thus, by such control, it is possible to accurately determine whether or not the stepping motor is vibrating due to the problem of the overshoot, and to reasonably control the drive current, thereby suppressing an unnecessary increase in the drive current, avoiding waste of electric power resources, and saving energy in the device.
Fig. 1 shows the above-described respective states of the stepping motor. As shown in fig. 1, the detection of the vibration amount of the stepping motor is represented by the detection of the amplitude of the stepping motor by the vibration sensor, the horizontal axis represents time, the vertical axis represents the amplitude of the stepping motor, the positive and negative are divided, the positive and negative are different only in the amplitude direction, and the parts represent the values of the amplitude. And the vibration amount can be regarded as an absolute value of the amplitude (amplitude in any direction). When the amplitude of the stepping motor is equal to or less than a (threshold value) ±10%, the vibration of the stepping motor is considered to be the vibration generated at the time of normal operation, and thus the stepping motor is considered to be in a state of normal operation. And when the amplitude of the stepping motor detected by the vibration sensor satisfies A + -20%. Gtoreq.amplitude > A + -10%, it is determined that there is a risk of de-tuning. At this time, the control part applies a larger driving current to the stepping motor so as to avoid the occurrence of the desuperheating of the stepping motor due to the insufficient output torque. When the amplitude of the stepping motor is greater than a±20%, the control unit is considered to continue detecting the vibration without increasing the drive current because the possibility of the vibration of the stepping motor being caused by the external vibration is high.
Here, the vibration of the amplitude of the stepping motor may be measured in three directions, i.e., X (front-rear) direction, Y (left-right) direction, and Z (up-down) direction. X, Y, Z directions represent the front-back, left-right, and up-down directions, respectively, in a state where the device is usable. When the amplitude in all three directions satisfies the amplitude less than or equal to A (threshold value) +/-10%, the stepping motor is considered to be in a normal working state, when the amplitude in any direction satisfies the amplitude A+/-20%. Gtoreq.A+/-10%, the judgment is that the motor is in the risk of desuned, and when the amplitude in any direction is greater than A+/-20%, the motor is considered to be vibration given from the outside, and the detection is continued.
By detecting the amplitudes (vibration amounts) in a plurality of directions (three directions in the present embodiment) when the stepping motor vibrates as described above, the operation state of the stepping motor can be grasped more accurately, the driving current can be controlled more accurately and reasonably, and the waste of power resources can be suppressed more effectively.
In the present embodiment, when the driving current is increased, the control unit may divide the driving current into a plurality of stages and control the driving current so as to change the driving current from stage to stage.
Fig. 2 shows a main part of a circuit diagram of an example of controlling the drive current. As shown in fig. 2, a CPU of the control unit (microcomputer) is connected with, for example, 3 stages (stages) of circuit paths. The control unit receives vibration values detected by, for example, three-directional vibration sensors X, Y, Z, and when it is determined that an increase in the drive current is necessary, the control unit controls the drive current so that the drive current is changed in stages.
Specifically, first, the CPU of the control unit supplies power to the drive chip P of the stepping motor via the current path TR1, and increases the drive current of one stage, that is, the two-stage drive current. And the current in the normal operation state is set to be the primary current. Then, the vibration sensor measures the vibration amount of the stepping motor again, and if the vibration amount of the stepping motor is within the threshold value a+10%, the stepping motor is considered to have recovered to a normal operation state, and the CPU does not increase the drive current any more. When the vibration sensor measures the vibration quantity of the stepping motor again and the vibration quantity is still in the range of A+20% or more and the vibration quantity is more than A+10%, the CPU further changes the current path into a TR2 current path, and the driving current of one stage is increased on the basis of increasing the driving current of one stage (the driving current of two stages), namely the three-stage driving current. Similarly, if it is determined that the drive current needs to be increased again after the drive current of two stages is increased, the CPU further changes the TR3 current path to increase the drive current of one stage again on the basis of increasing the drive current of two stages (three-stage drive current), and the four-stage drive current is obtained.
Here, the driving current can be changed by providing resistors R1 to R4 in the respective driving current paths TR1 to TR 3. Further, the drive current of each stage may be increased by the same amount, for example, 20%, as compared to the drive current of the previous stage. That is, the secondary driving current is 1.2 times the primary driving current which is the driving current in normal operation, the tertiary driving current is 1.4 times the primary driving current, and the quaternary driving current is 1.6 times the primary driving current.
In this way, by increasing the drive current in stages, abrupt changes in the drive current applied to the stepper motor can be avoided, and the drive chip of the stepper motor can be protected from damage due to an excessive current change, and the drive current can be changed appropriately according to the operating state of the stepper motor. Further, by increasing the drive current step by step, the waste of power resources can be further suppressed, and the device can be energy-saving. Further, by increasing the drive current in each stage by the same amount, the setting of the circuits TR1 to TR3 and the resistors R1 to R4 can be facilitated.
Fig. 3 is a flowchart showing a control method of the image forming apparatus of the present invention. As shown in fig. 3, first, the vibration sensor detects the vibration of the stepping motor, that is, the amplitude (step S1). Then, the amplitude detected by the vibration sensor is transmitted to the CPU of the microcomputer, and compared with a threshold value of vibration stored in advance in the storage medium (step S2). When the detected amplitude is compared with the threshold value a±20% by the determining unit (step S3), if the amplitude is greater than a±20% (no in step S3), the vibration is regarded as the vibration given from the outside, the process returns to step S1, and if the amplitude is equal to or less than a±20% (yes in step S3), the determining unit further determines whether or not the amplitude is equal to or less than a±10% (step S4). If the amplitude is a±10% or less (yes in S4), it is determined that the stepping motor is in a normal operation state, and the routine returns to step S1 to continue the detection of the amplitude. When the amplitude is greater than a±10% (no in S4), the control unit determines that the stepping motor is in an abnormal operation state, and controls the drive current so that the current increases by one stage, for example, from the primary current to the secondary current, and similarly, the drive current is increased from stage to stage.
In addition to the control of the drive current, the control unit may increase the drive current and then decrease the drive current at constant intervals until the drive current reaches the drive current in the normal operation state of the stepping motor.
Specifically, as described above, when it is determined that the stepping motor is in an abnormal operation state and the control section increases the drive current step by step to return the stepping motor to a normal operation state, the detection section continues to detect the vibration of the stepping motor. When the vibration amount detected by the detection unit is within a range smaller than the threshold value a+10% for a certain period of time, the stepping motor is considered to overcome the shortage of the output torque. In view of the fact that the output torque of the stepping motor is generally insufficient temporarily, the control unit lowers the drive current from stage to stage when the drive current is raised to bring the stepping motor into a normal operation state and maintained for a certain period of time.
For example, when the control unit increases the drive current to the four-stage drive current and then brings the stepping motor into a normal operation state, the stepping motor maintains the normal operation state for a predetermined period of time, for example, several minutes or ten minutes, and then the control unit decreases the four-stage drive current by one stage to bring the drive current to the three-stage drive current. At this time, the detection unit detects the vibration amount of the stepping motor, and when the detection unit detects that the vibration of the stepping motor is not further increased and the stepping motor continues to maintain the normal operation state for a certain period of time, the control unit reduces the three-stage drive current by one more stage, so that the drive current is the two-stage drive current. And so on until the drive current is reduced to a first level drive current. In this period, when it is determined that the current of one stage needs to be raised when the vibration amount of the stepping motor is detected again to be increased, the control unit raises the drive current of one stage.
According to the control method, the control method of the invention repeatedly increases and decreases the driving current, so that the driving current can be optimized, thereby avoiding the waste of electric power resources and saving energy of the device. In addition, the driving current is reduced section by section, and the driving current is prevented from changing rapidly, so that the service life of the device is prolonged.
The stepping motor to be controlled is, for example, a stepping motor on a paper path of the image forming apparatus. The problem of insufficient output torque occurs most easily due to the stepping motor located on the paper path. Therefore, the stepping motor on the paper path is used as a control object, the problem of insufficient output torque can be effectively solved, and the control method is simple and easy to realize.
While the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and can be realized by various configurations within a range not departing from the gist thereof. For example, the technical features of the embodiments described in the summary of the invention can be replaced or combined as appropriate. In addition, the portions not described as essential features in the present specification can be deleted appropriately.
Claims (6)
1. A control method of an image forming apparatus controls a driving current applied to a stepping motor,
the control method of the image forming apparatus is characterized by comprising the following steps:
a detection step, detecting a parameter value of the stepping motor in a working state;
a determination step of comparing the parameter value detected by the detection step with a threshold value corresponding to the parameter value stored in advance in a storage unit, thereby determining whether the stepping motor is in a normal operation state;
a control step of controlling the drive current by a control unit so that the stepping motor is brought into a normal operation state when it is determined in the determination step that the stepping motor is not in the normal operation state,
in the detecting step, the vibration amount of the stepping motor is detected as a parameter value,
when it is determined in the determining step that the detected vibration amount is larger than the vibration amount stored in advance in the storage section as the threshold value, it is determined that the stepping motor is not in a normal operation state, and in the controlling step, a driving current larger than the driving current in the normal operation state as the stepping motor is applied to the stepping motor by the control section,
when the vibration amount is the threshold value +10% or less, the control section does not change the driving current,
in the case where the vibration amount exceeds the threshold value +20%, the control section does not change the drive current,
the stepper motor is a stepper motor on a paper path of the image forming apparatus.
2. The method for controlling an image forming apparatus according to claim 1, wherein,
the drive current in the normal operation state of the stepping motor is set in such a manner that the output torque of the stepping motor is equal to the load on the paper path.
3. The method for controlling an image forming apparatus according to claim 1 or 2, wherein,
the control unit divides the drive current into a plurality of stages, and controls the drive current so that the drive current is changed from stage to stage.
4. The method for controlling an image forming apparatus according to claim 3, wherein,
after the control unit changes the drive current, the drive current is lowered by one stage at constant time intervals until the drive current becomes the drive current in a normal operation state of the stepping motor.
5. The method for controlling an image forming apparatus according to claim 1 or 2, wherein,
the vibration amount is vibration amounts in a plurality of directions when the stepping motor vibrates.
6. A control system of an image forming apparatus controls a drive current applied to a stepping motor,
the control system of the image forming apparatus is characterized by comprising:
a detection unit that detects a parameter value of the stepping motor in an operating state;
a determination unit that compares the parameter value detected by the detection unit with a threshold value corresponding to the parameter value stored in advance in a storage unit, and determines whether or not the stepping motor is in a normal operation state;
a control unit that controls the drive current so that the stepping motor is in a normal operation state when it is determined that the stepping motor is not in the normal operation state,
the detecting section detects the vibration amount of the stepping motor as a parameter value,
when the determination section determines that the detected vibration amount is larger than the vibration amount stored in advance in the storage section as the threshold value, it is determined that the stepping motor is not in a normal operation state, and the control section applies a drive current larger than the drive current in the normal operation state as the stepping motor to the stepping motor,
when the vibration amount is the threshold value +10% or less, the control section does not change the driving current,
in the case where the vibration amount exceeds the threshold value +20%, the control section does not change the drive current,
the stepper motor is a stepper motor on a paper path of the image forming apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010321067.0A CN113541541B (en) | 2020-04-22 | 2020-04-22 | Control method and control system for image forming apparatus |
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| CN106160603A (en) * | 2016-09-23 | 2016-11-23 | 北京灵铱科技有限公司 | A kind of low-power-loss stepping |
| WO2019176338A1 (en) * | 2018-03-13 | 2019-09-19 | オムロン株式会社 | Motor drive device |
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| JPH0759392A (en) * | 1993-08-17 | 1995-03-03 | Hitachi Kiden Kogyo Ltd | Oscillating current controller of induction motor driving by inverter |
| JPH09146363A (en) * | 1995-11-20 | 1997-06-06 | Ricoh Co Ltd | Image forming device |
| JP2000166296A (en) * | 1998-11-27 | 2000-06-16 | Fujitsu Ltd | Method and device for driving body to be driven and printer using drive device |
| CN1767364A (en) * | 2004-10-27 | 2006-05-03 | 日本电气株式会社 | Motor-drive circuit and driving method |
| JP2006123251A (en) * | 2004-10-27 | 2006-05-18 | Canon Inc | Printing apparatus equipped with vibration suppressing function |
| KR100677491B1 (en) * | 2005-09-12 | 2007-02-02 | 엘지전자 주식회사 | Sound coupling vibration power control apparatus for mobile communication device |
| CN106160603A (en) * | 2016-09-23 | 2016-11-23 | 北京灵铱科技有限公司 | A kind of low-power-loss stepping |
| WO2019176338A1 (en) * | 2018-03-13 | 2019-09-19 | オムロン株式会社 | Motor drive device |
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