JPH04275691A - Medium conveyance controller - Google Patents

Abstract

PURPOSE:To enable high-quality control by transmitting a correcting amount to a conveying means, positioning a medium after temporarily conveying it backward, next conveying it forward and conveying the above-mentioned medium while positioning it when conveying the medium backward. CONSTITUTION:According to the designated moving amount of forward conveyance, a conveying means 1 converts the moving amount to the unit moving amount of a driving mechanism and conveys the medium. A conveyance correcting means 6 transmits the correcting amount after calculating a value to minimize the physical moving amounts of forward and backward positioning means 4 and 5 for the movement to the position designated by the backward conveyance. In this case, when the conveying means 1 detects the designation of the backward conveyance, the conveyance correcting means 6 uses the physical moving amount stored in a storing means 3. Thus, in the case of conveying the medium backward, this medium is temporarily conveyed backward, positioned, next conveyed forward and positioned so as to convey this medium.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device having a medium moving mechanism, and more particularly to control of medium conveyance.

0002

2. Description of the Related Art Conventionally, this type of medium conveyance control device uses a system in which the medium is conveyed once to a detection mechanism for positioning the medium, and thereafter, a method is used based on counting control of the minimum unit movement amount determined by the conveyance drive mechanism. ing.

0003

[Problems to be Solved by the Invention] As mentioned above, in the conventional media transport control device, accuracy in the same direction is basically not a problem because it is determined by a multiple of the unit movement amount of the drive mechanism. When conveying while constantly changing the direction, there is a drawback that, although it depends on the structure of the drive mechanism, in principle it does not match the multiple of the unit movement amount, resulting in unstable conveyance results.

An object of the present invention is to position the direction accompanying the movement of the medium as important information, and to use a uniquely determined direction (for example,
When the actuator moves in the opposite direction (forward direction), the amount of movement is calculated so that the actuator can operate in the forward direction. In addition, in order to minimize errors in the physical movement amount due to the transport direction, corrective transport is always performed in a uniquely determined positive direction, thereby eliminating the above drawbacks and enabling high-quality media transport control. An object of the present invention is to provide a medium conveyance control device.

[0005]

[Means for Solving the Problems] A medium conveyance control device of the present invention provides a conveying means that conveys a medium by converting the movement amount into a multiple of the unit movement amount of a drive mechanism according to a specified movement amount for forward direction conveyance. a transport amount detection means for detecting the movement of the transport means as well as the amount of physical movement thereof; a storage means for storing the amount of physical movement detected by the transport amount detection means; and a corrector for positioning the medium for forward transport. a direction positioning means; a reverse direction positioning means for positioning a medium to be conveyed in the reverse direction;
Physical movement between the reverse direction positioning means and the forward direction positioning means to move to the position designated by the reverse direction transport according to the physical movement amount stored in the storage means when the transport means detects the designation of reverse direction transport. It has a conveyance correction means that calculates a value that minimizes the amount and sends out a correction amount, and when the medium is conveyed in the reverse direction, the conveyance correction means sends out the correction amount to the medium conveyance means, and once the medium is moved in the reverse direction. The medium is transported, positioned by a reverse direction positioning means, then transported in a forward direction, and positioned by a forward direction positioning means.

[0006]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a medium conveyance control device according to an embodiment of the present invention.

In FIG. 1, the medium conveyance control device of this embodiment includes a conveyance means 1, a conveyance amount detection means 2, and a storage means 3.
, forward direction positioning means 4 , reverse direction positioning means 5 , and conveyance correction means 6 .

According to the amount of movement specified by the conveyance means 1, the amount of movement is converted into a multiple of the unit movement amount of the drive mechanism, and the medium is conveyed.

[0010] Along with the movement of the conveyance means 1, the amount of physical movement thereof is detected by the conveyance amount detection means 2, and this data is stored in the storage means 3. Further, for positioning the medium, there is a forward positioning means 4 for positioning the medium for forward transport, and a reverse positioning means 5 for positioning the medium for reverse transport.
This is done by

[0011] For example, if the uniquely determined direction is the forward direction and the conveyance means 1 detects the designation of reverse direction conveyance,
Physical movement of the reverse direction positioning means 5 and the forward direction positioning means 4 in order to move to the position designated by the transport correction means 6 in the reverse direction according to the data (physical movement amount) stored in the storage means 3 A value that minimizes the amount is calculated and a correction amount is sent.

[0012] Thus, in the case of conveying the medium in the reverse direction, the conveyance correction means 6 sends the correction amount to the conveyance means 1, the medium is once conveyed in the reverse direction, is positioned by the reverse direction positioning means 5, and then, Conveying in the forward direction, forward direction positioning means 4
to position the medium and transport the medium to a predetermined position.

[0013]

[Effects of the Invention] As explained above, the medium conveyance control device of the present invention positions the direction accompanying the movement of the medium as important information, and the direction that accompanies the movement of the medium is regarded as important information. When it moves, the amount of movement is conveyed to the positioning detection mechanism set to be able to operate in the forward direction, and by having a feedback means to correct the movement in the forward direction again, it is possible to reduce the amount of physical movement in the conveyance direction. In order to minimize the error, corrective conveyance is always performed in a uniquely determined positive direction, which has the effect of enabling high-quality medium conveyance control.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a system using a medium transport control device according to an embodiment of the present invention.

[Explanation of symbols]

1 Transport means 2 Transport amount detection means 3. Storage means 4 Forward direction positioning means 5 Reverse direction positioning means 6 Conveyance correction means

Claims (1)

[Claims] 1. A conveying means that conveys a medium by converting the amount of movement into a multiple of a unit movement amount of a drive mechanism according to a specified amount of movement of the forward direction conveyance, and an operation of the conveying means as well as the amount of physical operation thereof. transport amount detection means for detecting the amount of physical movement detected by the transport amount detection means; forward direction positioning means for positioning the medium for forward direction transport; and storage means for storing the physical movement amount detected by the transport amount detection means; reverse direction positioning means for positioning; and said reverse direction positioning means for moving to the position designated by said reverse direction transport according to the physical movement amount stored in said storage means when said transport means detects the designation of reverse direction transport. It has a direction positioning means and a conveyance correction means that calculates a value that minimizes the physical movement amount of the forward direction positioning means and sends out a correction amount, and when the medium is conveyed in the reverse direction, the conveyance correction means makes a correction. amount to the medium conveying means, once conveying the medium in a reverse direction, positioning it by the reverse direction positioning means, then conveying it in a forward direction, positioning it by the forward direction positioning means, and conveying the medium. A medium conveyance control device characterized by: