TH4412B - A method and intermediary for the rest of the read / write head in the disk drive by using the back-EMF of the motor to turn the stepper motor. - Google Patents

Abstract

An electronic circuit provided to position the read / write head in the desired area when the current is cut off from the drive. When electric power is removed from the driver The energy accumulated by the spinning motor is used as a source of electrical energy and as a pulse of time to feed the stepper motor, which drives the drive of the disk drive. The energy produced by the rotating motor while it is slowing down the rotation speed is known as the "back EMF". A continuous modulation circuit is provided to allow energy and clock pulses to the windings. It is then selected of the stepper motor in order to allow the stepper motor to rotate in the desired direction so that the displacement of the transfer head into the desired position, ie in the diameter of the disc, whenever power. Cut from the disk drive Because the position of the head when a power failure is unknown. The timing pulses must be sufficiently numbered to allow the transceiver to the stop for the allotted time even if the power is off when the head is at the outermost edge of the track. The step pulse will continue until the motor's backEMF is insufficient to produce that pulse. After the signal switch head enters the desired position, it stops. The excess step results in the thrusters colliding with a "internal collision" mechanism designed to prevent damage to the head, changing the signal from colliding with the extender that extends the disc.

Claims (6)

1. In the disk A drive, consisting of a number of discs, is installed for rotation inside the machine, a disk drive, a spinning motor that drives such discs, spins a pusher that drives a row of transponders in relation to the disc. The pusher includes a carriage for the tap changer bar. And the stepper motor can be connected to the carriage to determine the carriage position and the row of transponders in relation to the disc and the circuit for detecting electric power outages. The interrupting medium, the row of the switching head, is at the specified pause position relative to the disc after the power is lost from the driver that contains the stop circuit of the stepper motor controller. Normal and continuous retraction circuit by a stepper motor connected between the rotating motor and the selected winding of the stepper motor used to drive and respond to the motor output signal. To power the stapler motor's aforementioned coil, it moves the row of the interchangeable head to its predetermined position. The clock signal, in response to the motor windings output, rotates for the said stepper motor to the number of steps required for resting, the row of such transformers at the specified position and where A circuit that responds to the lack of electrical power from the disk drive, activates the continuity-modulating circuit 3. The disk drive, according to Proposition 1, where the spinning motor produces back EMF. Comes up when the DC power that goes to Driver is missing A continuous adjustment circuit of retract by such a stepper motor. It consists of a medium for connecting the aforementioned back EMF to the selected phase of the said stepper motor in order to cause the stepper motor to move the row of the transformers to position. Such breaks, a cycle that responds to the absence of electrical power from the disk. The drive activates the continuity modulator 4. Disc drive according to claim 3, the continuity modifier includes a rectifying medium and a back EMF filter. 5. The disc drive according to claim 4, which the output of the medium for such connection of the continuity-modulating circuit is connected to the winding of the stepper motor. It is connected to one end of the aforementioned winding of the said stepper motor. The continuity circuit also includes a loop. The clock rove responds to the output of the motor winding to produce a continuous pulse of the clock signal.The output of the clock circuit is connected to the other end of the winding to provide power. 6. The disk drive, according to claim 5, in which the manufactured back-EMF and the aforementioned clock circuit output are connected to the windings of the said stepper motor. 7. At least two coils. 7. The disk drive, according to claim 2 or 3, is supplied with external DC power to the sub-disc motor. An intermediary for producing a signal that indicates the presence of such a DC power feeder. Coupling circuit As it responds to the medium, it produces such a signal to induce the displacement of the repeller to the predetermined pause position. The designated location is generally on the inside of the disc and within the diameter of the innermost track. It responds to a change in the state of the medium's output signal, producing such a signal to induce the predetermined motion of the impeller. 9. In a recording device that includes a frame. A circular data disc is placed on a rotating platform within the frame and is driven by a rotating motor at a constant speed. A disc is a track of multiple concentricities on the surface of that disc. At least one transition head structure is installed very close to the surface of the track of the disc and the impeller component to determine the position of the transitional head structure. In relation to the track, it consists of a carriage to attach the structure of the turning head to one end of the section and a stepper motor. The carriage is attached to the carriage to determine the position of the carriage and its structure in relation to the track and the DC power feed for the motor.The improvement consists of a continuity adjustment circuit connected between the motors. Rotates with the selected winding of the stepper motor that is used to drive and respond to the motor output signal to power the stepper motor windings to move the pusher to the specified position. And the control signal generator responds to the disappearance of the signal from the aforementioned DC supply to the motor to excite the continuity circuit 1 0. Storage device according to claim 9. The continuous modulation circuit includes a clock-receiving medium and an energy-producing medium from the backEM F, which is produced by a rotating motor that is rotating to provide a specified power, namely a coil. The wire of such a stepper motor 1 1. A storage device in accordance with claim 10, in which the energy signal-generating medium consists of a medium for connecting the backEM F of the rotating motor to the selected winding of the said stepper motor. 2. A storage device according to claim 11, in which the output of the energy-producing medium is connected to one end of the selected coil of Stepper motor, the output of the clock-producing circuit, is connected to the other end of the selected winding to activate the windings selectively and thus the stepper motor. Set the carriage position 1 3. A device according to claim 12, in which the aforementioned back EMF and the said clock circuit output are connected to at least two windings of the said stepper motor. 4. Device according to claim 13, which the continuity adjustment circuit will answer Responds to a change in the state of the media output to produce an energy signal to induce a predetermined motion of the impeller 1. 5. Equipment according to claim 14, which There is also a medium for converting the aforementioned backEMF signal to a digital clock signal to set the specified winding of the stepper motor. 6. Equipment pursuant to claim 9, where such position is typically located on the inside of such disc and within the diameter of the innermost track.