Claims
- 1. A method for driving a DC motor in a printer, the printer including a drive train connected to the DC motor for driving a printing mechanism, the method comprising the steps of:
- generating a lock error signal in response to a locked condition of the drive train;
- driving the DC motor for a predetermined period using a square wave driving signal such that the DC motor is turned on and off a plurality of times, the square wave drive signal having a period sufficient to transmit force from the DC motor to the drive train; and
- at the end of the predetermined period, driving the DC motor using a continuous DC drive signal;
- wherein the step of driving the DC motor using the square wave drive signal is executed in response to the lock error signal.
- 2. A method of driving a DC motor according to claim 1 wherein the period of the square wave drive signal is 100 milliseconds.
- 3. A method for driving a DC motor in a printer, the printer including a drive train connected to the DC motor for driving a printing mechanism, the method comprising the steps of:
- generating a lock error signal in response to a detected locked condition of the drive train;
- in response to the lock error signal, driving the DC motor for a predetermined period using a square wave driving signal such that the DC motor is turned on and off a plurality of times, the square wave drive signal having a period sufficient to transmit force from the DC motor to the drive train; and
- at the end of the predetermined period, driving the DC motor using a continuous DC drive signal.
- 4. A method of driving a DC motor according to claim 3 wherein the period of the square wave drive signal is 100 milliseconds.
- 5. A method for driving a DC motor in a printer, the printer including a drive train connected to the DC motor for driving a printing mechanism, the method comprising the steps of:
- detecting a locked condition of the drive train, the locked condition occurring when a driving force, generated by the DC motor in response to a constant drive signal, fails to drive the printing mechanism;
- generating a lock error signal in response to the detected locked condition of the drive train;
- in response to the lock error signal, driving the DC motor using a pulsating drive signal such that the DC motor is turned on and off a predetermined number of times, the pulsating drive signal having sufficient electrical energy to cause the driving force from the DC motor to create a mechanical pulse along the entire drive train; and
- at the end of the predetermined number of times, driving the DC motor using a constant drive signal.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3-267494 |
Oct 1991 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 07/957,310, filed Oct. 5, 1992.
US Referenced Citations (9)
Foreign Referenced Citations (1)
Number |
Date |
Country |
311198 |
Dec 1990 |
JPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
957310 |
Oct 1992 |
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