JPS6363158A - Magnetic tape driving device - Google Patents

Abstract

PURPOSE:To reduce a power consumption and calorific power by reducing the tension of a magnetic tape more than the tension of its transfer time at the time when the transfer of the magnetic tape is suspended. CONSTITUTION:The amplification factor of a tension signal amplifying part 6 is reduced after the running of a magnetic tape 9 being stopped with the running order signal 10 of the magnetic tape being not given from a control part. The tension currents flowing to a feeding reel motor 3 and winding reel motor 4 are reduced more than the magnetic tape running time. When the running order signal 10 of the magnetic tape is given, the amplification factor of the tension signal amplifying part 6 is increased, the tension currents flowing to the feeding reel motor 3 and winding reel motor 4 are increased and the tension of the magnetic tape 9 is restored to the regulated value. The power consumption and calorific power can thus be reduced by reducing the tension of the magnetic tape at the time of the magnetic tape running stoppage.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic tape pivoting device, and particularly to a magnetic tape device for storing digital information used in an information processing device. Related to tape drives.

[Conventional technology]

Conventionally, this type of magnetic tape drive device has two reels wound with magnetic tape, a reel motor coupled to the two reels, a reel motor drive device, and a tension sensor that measures the tension of the magnetic tape. The magnetic tape runs from one reel to the other reel while maintaining a constant tension according to the magnetic tape running command from the host device, and when the running command is no longer given, the magnetic tape stops and maintains the stopped position. do.

The tension of the magnetic tape is controlled by feeding back the tension signal from the tension sensor to the reel motor drive unit, but in conventional magnetic tape drive devices, the tension is controlled in the same way even when the magnetic tape is stopped as when the magnetic tape is running. was being carried out.

For this reason, in conventional magnetic tape drive devices, a current is applied to the reel motor from the moving part of the reel motor to maintain the tension of the magnetic tape even in the cylinder where the magnetic tape stops running.
Magnetic tape drives consumed a lot of power and generated a lot of heat.

[Problem that the invention seeks to solve]

The above-described conventional magnetic tape drive device performs the same tension control when the magnetic tape stops running as it does when the magnetic tape is running, so it has the disadvantage that power consumption and heat generation are large when the magnetic tape stops running.

[Means for solving problems]

The magnetic tape drive device of the present invention has two reels on which magnetic tape is wound, and two reel motors that are coupled to the reels and drive the reels in the rotational direction. In the magnetic tape 1 rigid device that transports the magnetic tape using only the driving force of the reel motor, when the transport of the magnetic tape is interrupted, the tension of the magnetic tape is reduced from the tension during transport. This is a special number.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to the drawing, which is a block diagram of an embodiment of the present invention, a magnetic tape 9 is wound around a supply reel 1 and a take-up reel 2, and a tension sensor 5 between the two reels detects the tension of the magnetic tape 9. is provided.

A supply reel motor 3 is coupled to the supply reel 1, a take-up reel motor 4 is coupled to the take-up reel 2, the supply reel motor 3 is driven by a supply reel motor drive section 7, and the take-up reel motor 4 is driven by a take-up reel motor drive section 8.

The output signal of the tension sensor 5 is transmitted to the tension signal amplification section 6, amplified by a predetermined amplification factor, and then transmitted to the supply reel motor drive section 7 and the take-up reel motor drive section 8. Thereby, the tension of the magnetic tape 9 is controlled to be constant.

After the magnetic tape running command signal 10 is no longer applied from a control section (not shown) and the running of the magnetic tape 9 is stopped, the amplification factor of the tension signal amplifying section 6 is reduced. Therefore, the tension current flowing through the supply reel motor 3 and the take-up reel motor 4 is reduced compared to when the magnetic tape is running.

When the magnetic tape running command signal 10 is given, the amplification factor of the tension signal amplifying section 6 increases, the tension current flowing through the supply reel motor 3 and the take-up reel motor 4 increases, and the tension of the magnetic tape 9 reaches a specified value. to return to.

〔Effect of the invention〕

As explained above, the magnetic tape drive device of the present invention includes:
By reducing the tension of the magnetic tape when the magnetic tape stops running, it is possible to reduce the amount of power consumed and the amount of heat generated.

[Brief explanation of drawings]

The drawing is a block diagram showing one embodiment of the present invention.

Claims (1)

[Claims] It has two reels on which magnetic tape is wound, and two reel motors that are respectively connected to the reels and drive the reels in the rotational direction, and only the driving force of the reel motors is transmitted from one reel to the other reel. A magnetic tape drive device for transporting the magnetic tape using the magnetic tape drive device, characterized in that when the transport of the magnetic tape is interrupted, the tension of the magnetic tape is lower than the tension during transport.