GB1422249A - Tape transport system - Google Patents

Tape transport system

Info

Publication number
GB1422249A
GB1422249A GB2083873A GB2083873A GB1422249A GB 1422249 A GB1422249 A GB 1422249A GB 2083873 A GB2083873 A GB 2083873A GB 2083873 A GB2083873 A GB 2083873A GB 1422249 A GB1422249 A GB 1422249A
Authority
GB
United Kingdom
Prior art keywords
reel
signal
speed
linear speed
produce
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2083873A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unisys Corp
Original Assignee
Burroughs Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Burroughs Corp filed Critical Burroughs Corp
Priority to GB2083873A priority Critical patent/GB1422249A/en
Publication of GB1422249A publication Critical patent/GB1422249A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G11B15/54—Controlling, regulating, or indicating speed by stroboscope; by tachometer

Landscapes

  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)

Abstract

1422249 Automatic control of speed BURROUGHS CORP 2 May 1973 20838/73 Heading G3R A reel to reel tape transport system has the speed of the drive reel controlled to keep the linear speed of the tape at a constant commanded level by deriving the linear speed from the product of signals representing the instantaneous angular velocity and effective radius of one of the reels and comparing the signal so derived with a reference signal to produce an error signal which is applied to the drive reel motor controller. In the system shown, a photo-electric pulse generator 34 followed by a pulse shaping network 40 and monostable circuit 42 is used to provide a train of standard pulses Vm whose repetition rate corresponds to the angular velocity of the supply reel Rs. This pulse train is integrated at 46 to produce a voltage proportional to the speed of the supply reel Ws. Additionally the pulses Vm pass to a counter 52 which is pre-set with a value corresponding to the largest effective radius of the supply reel and counts down on receipt of each pulse so that at every instant the value in the counter represents the effective radius is of the reel. After conversion at 54 the signal rs and ws are multiplied in a four quadrant multiplier 58 to produce a linear speed signal Vo which is compared at 20 with a desired speed signal Vc from generator 2. The error signal VER is used to control the conduction of a transistor in the circuit of drive motor Md, Fig. 3 (not shown). An analogue system for controlling the linear speed of a tape is disclosed in Specification 1422250.
GB2083873A 1973-05-02 1973-05-02 Tape transport system Expired GB1422249A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2083873A GB1422249A (en) 1973-05-02 1973-05-02 Tape transport system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2083873A GB1422249A (en) 1973-05-02 1973-05-02 Tape transport system

Publications (1)

Publication Number Publication Date
GB1422249A true GB1422249A (en) 1976-01-21

Family

ID=10152564

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2083873A Expired GB1422249A (en) 1973-05-02 1973-05-02 Tape transport system

Country Status (1)

Country Link
GB (1) GB1422249A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398011A1 (en) * 1977-07-18 1979-02-16 Akzo Nv ELECTRONICALLY CONTROLLED WINDING DEVICE
US8733687B2 (en) 2010-10-25 2014-05-27 The Procter & Gamble Company Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8733686B2 (en) 2010-10-25 2014-05-27 The Procter & Gamble Company Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8733685B2 (en) 2010-10-25 2014-05-27 The Procter & Gamble Company Apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8740130B2 (en) 2010-10-25 2014-06-03 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US8757535B2 (en) 2010-10-25 2014-06-24 The Procter & Gamble Company Method for reducing web feed rate variations induced by parent roll geometry variations
US9434572B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US9434573B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2398011A1 (en) * 1977-07-18 1979-02-16 Akzo Nv ELECTRONICALLY CONTROLLED WINDING DEVICE
US8733687B2 (en) 2010-10-25 2014-05-27 The Procter & Gamble Company Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8733686B2 (en) 2010-10-25 2014-05-27 The Procter & Gamble Company Alternative apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8733685B2 (en) 2010-10-25 2014-05-27 The Procter & Gamble Company Apparatus for reducing web feed rate variations induced by parent roll geometry variations
US8740130B2 (en) 2010-10-25 2014-06-03 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US8757535B2 (en) 2010-10-25 2014-06-24 The Procter & Gamble Company Method for reducing web feed rate variations induced by parent roll geometry variations
US9434572B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations
US9434573B2 (en) 2010-10-25 2016-09-06 The Procter & Gamble Company Alternative method for reducing web feed rate variations induced by parent roll geometry variations

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee