Tape tension apparatus

Claim 2

A tape traveling apparatus comprising: first tape drive means and second tape drive means for driving a manetic tape at separated two points respectively; tension detection means for detecting a tension of said magnetic tape between said first tape drive means and said second tape drive means; tape travel instruction means for producing an instruction signal indicating a drive condition of said magnetic tape; first control means for controlling said first tape drive means according to said instruction signal; variable gain amplification means for variably amplifying said instruction signal according to an output of said tension detection means; and second control means for controlling said second tape drive means according to an output of said amplification means.

Claim 3

A tape traveling apparatus as in claim 1, wherein said variable gain amplification means comprises: a first multiplier for multiplying the output of said tension detection means by the instruction signal; an integrator for integrating with respect to time a multiplied result of said first multiplier; and a second multilier for multiplying the instructin signal by an integrated result of said integrator, a multiplied result of said second multiplier being fed to said second drive means.

Claim 4

A tape traveling apparatus as in claim 1, wherein said variable gain amplification means comprises: a differentiator for differentiating with respect to time the output of said tension detection means; an adder for adding the output of said tension detection means and a differentiated result of said differentiator; a first multiplier for multiplying an added result of said adder by the instruction signal; an integrator for integrating with respect to time a multiplied result of said first multiplier; and a second multiplier for multiplying the instruction signal by an integrated result of said integrator, a multiplied result of said second multiplier being fed to said second drive means.

Claim 5

A tape traveling apparatus in a helical-scan type magnetic recording and playing back apparatus, comprising: reel drive means for driving a supply reel on which a magnetic tape has been wound; tape transfer means for pulling said magnetic tape out of said supply reel through a rotating drum on which a magnetic head is mounted and traveling the tape at an approximately constant speed; tension detection means for detecting a tension of said magnetic tape; a moving-post installed between said supply reel and said tape transfer means for variably regulating a length of said magnetic tape between said supply reel and said tape transfer means; actuator means for driving said moving-post; tracking error detection means for detecting a dislocation between a recording track on said magnetic tape and a scanning position of said magnetic head; tracking control means for controlling a travel phase of said magnetic tape by controlling said tape transfer means according to an output of said tracking error detection means; first tension control means for controlling said reel drive means according to an output of said tension detection means; variable gain amplication means for variably amplifying the output of said tracking error detection means according to the output of said tension detection means; and second tension control means for controlling a position of said moving-post by driving said actuator means according to an output of said variable gain amplification means.

Claim 6

A tape traveling apparatus in a helical-scan type magnetic recording and playing back apparatus, comprising: reel drive means for driving a supply reel on which a magnetic tape has been wound; tape transfer means for pulling said magnetic tape out of said supply reel through a rotating drum on which a magnetic head is mounted and traveling the tape at an approximately constant speed; tension detection means for detecting a tension of said magnetic tape; a moving-post installed between said supply reel and said tape transfer means for variably regulating a length of said magnetic tape between said supply reel and said tape transfer means; actuator means for driving said moving-post; tracking error detection means for detecting a dislocation between a recording track on said magnetic tape and a scanning position of said magnetic head; tracking control means for controlling a travel phase of said magnetic tape by controlling said tape transfer means according to an output of said tracking error detection means; first tension control means for controlling said reel drive means according to an output of said tension detection means; variable gain amplication means for variably amplifying the output of said tracking error detection means according to the output of said tension detection means; and second tension control means for controlling a position of said moving-post by driving said actuator means according to an output of said variable gain amplification means.

Claim 7

A tape traveling appraratus as in claim 4, wherein said variable gain amplification means comprises: a first multiplier for multiplying the output of said tension detection means by the output of said tracking error detection means; an integrator for integrating with respect to time a multiplied result of said first multiplier; and a second multiplier for multiplying the output of said tracking error detection means by an integrated result of said integrator, a multiplied result of said second multiplier being fed to said second tension control means.

Claim 8

A tape traveling apparatus as in claim 4, wherein said variable gain amplification means comprises: a differentiator for differentiating with respect to time the output of said tension detection means; an adder for adding the output of said tension detection means and a differentiated result of said differentiator; a first multiplier for multiplying an added result of said adder by the output of said tracking error detection means; an integrator for integrating with respect to time a multiplied result of said first multiplier; and a second multiplier for multiplying the output of said tracking error detection means by an integrated result of said integrator, a multiplied result of said second multiplier being fed to said second tension control means.

Claim 9

A tape traveling apparatus as in claim 6, wherein a frequency characteristic of the second tension control means is substantially the same as a frequency characteristic of the tracking control means.

Claim 10

A tape traveling apparatus as in claim 4, wherein a frequency characteristic of the second tension control means is substantially the same as a frequency characteristic of the tracking control means.

Claim 11

A tape traveling apparatus in a helical-scan type magnetic recording and playing back apparatus, comprising: reel drive means for driving a supply reel on which a magnetic tape has been wound; tape transfer means for pulling said magnetic tape out of said supply reel through a rotating drum on which a magnetic head is mounted and traveling the tape at an approximately constant speed; tension detection means for detecting a tension of said magnetic tape; first and second moving-posts installed between said supply reel and said tape transfer means for variablly regulating a length of said magnetic tape between said supply reel and said tape transfer means; first and second actuator means for driving said first and said second moving-posts, respectively; tracking error detection means for detecting a dislocation between a recording track on said magnetic tape and a scanning position of said magnetic head; first tracking control means for controlling a travel phase of said magnetic tape by controlling said tape transfer means according to an output of said tracking error detection means; second tracking control means for changing a position of said first moving-post by controlling said first actuator means according to the output of said tracking error detection means; first tension control means for controlling said reel drive means according to an output of said tension detection means; variable gain amplification means for variably amplifying the output of said tracking error detection means according to the output of said tension detection means; and second tension control means for controlling a position of said second moving-post by driving said second actuator means according to an output of said variable gain amplification means.

Claim 12

A tape traveling apparatus in a helical-scan type magnetic recording and playing back apparatus, comprising: reel drive means for driving a supply reel on which a magnetic tape has been wound; tape transfer means for pulling said magnetic tape out of said supply reel through a rotating drum on which a magnetic head is mounted and traveling the tape at an approximately constant speed; tension detection means for detecting a tension of said magnetic tape; first and second moving-posts installed between said supply reel and said tape transfer means for variablly regulating a length of said magnetic tape between said supply reel and said tape transfer means; first and second actuator means for driving said first and said second moving-posts, respectively; tracking error detection means for detecting a dislocation between a recording track on said magnetic tape and a scanning position of said magnetic head; first tracking control means for controlling a travel phase of said magnetic tape by controlling said tape transfer means according to an output of said tracking error detection means; second tracking control means for changing a position of said first moving-post by controlling said first actuator means according to the output of said tracking error detection means; first tension control means for controlling said reel drive means according to an output of said tension detection means; variable gain amplification means for variably amplifying the output of said tracking error detection means according to the output of said tension detection means; and second tension control means for controlling a position of said second moving-post by driving said second actuator means according to an output of said variable gain amplification means.

Claim 13

A tape traveling apparatus as in claim 9, wherein said variable gain amplification means comprises: first multiplier for multiplying the output of said tension detection means by the output of said tracking error detection means; an integrator for integrating with respect to time a multipled result of said first multiplier; and second multiplier for multiplying the output of said tracking error detection means by an integrated result of said integrator, a multiplied result of said second multiplier being fed to said second tension control means.

Claim 14

A tape traveling apparatus as in claim 10, wherein a frequency characteristic of the second tension control means is substantially the same as a frequency characteristic of the second tracking control means.

Claim 15

A tape traveling apparatus as in claim 9, wherein said variable gain amplification means comprises: a differentiator for differentiating with respect to time the output of said tension detection means; an adder for adding the output of said tension detection means and a differentiated result of said differentiator; a first multiplier for multiplying an added result of said adder by the output of said tracking error detection means; an integrator for integrating with respect to time a multiplied result of said first multiplier; and a second multiplier for multiplying the output of said tracking error detection means by an integrated result of said integrator, a multiplied result of said second multiplier being fed to said second tension control means.

Claim 16

A tape traveling apparatus as in claim 12, wherein a frequency characteristic of the second tension control means is substantially the same as a frequency characteristic of the second tracking control means

Claim 17

A tape traveling apparatus as in claim 9, wherein a frequency characteristic of the second tension control means is substantially the same as a frequency characteristic of the second tracking control means.