JPH106608A - Method for detecting and controlling thickness of paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To automatically adjust the interval between a label and a printing head so as to obtain the optimum printing quality. SOLUTION: Procedure S1 arranging printing data transmitted from a host device in printing order and inserting data returning to a printing position on the way in the gap between data arranged until now, procedure S2 judging that the data arranged in printing order become the quantity of one line, procedure S3 searching which position of printing paper is the first printing position of one line, procedure S4 moving the paper thickness detection part mounted on a carrier to the searched first printing position together with the printing head and procedure S5 detecting the thickness of the paper at the searched first printing position are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper thickness detection control method, and more particularly to a paper thickness detection control method for a serial printer that prints a label or the like.

[0002]

2. Description of the Related Art In an impact dot type printer or the like, the distance (head gap) between a platen and a printing head is adjusted to the thickness of the printing paper in order to always perform high quality printing on printing paper of various thicknesses. Need to be adjusted.

A conventional paper thickness detection control method will be described in detail with reference to the drawings.

FIG. 3 is a schematic view showing an example of the related art. The printer shown in FIG. 3 detects the platen 1 supporting the printing paper 100, the rotatable driven roller 8 pressed toward the platen 1 with the printing paper 100 interposed therebetween, and detects the rotation angle of the driven roller 8. Printing paper 1 from the rotation angle
The sheet thickness detecting means 30 detects the thickness of the sheet No. 00, and the head gap control means 40 controls the interval between the platen 1 and the print head 15 in response to the detection result.

When the printing paper 100 is sandwiched between the driven roller 8 and the platen 1, the rotation angle B of the driven roller 8 is larger than the rotation angle A when the printing paper 100 is not sandwiched. . Assuming that the radius of the platen 1 is r and the thickness of the printing paper 100 is t, the thickness t can be calculated by t = r · (BA) / A. Before the printing paper 100 is sucked into the state of starting printing, the gap adjusting motor 2
1 is automatically adjusted to optimize the head gap.

[0006]

The prior art described above is based on the problem that when printing labels on a release board, such as label printing paper, in which the labels are arranged in a matrix and adhered.
Since the position of the paper thickness detecting unit and the position of the printing unit are separated from each other, there is a disadvantage that it is difficult to automatically adjust the head gap to be optimal.

[0007]

According to a first aspect of the present invention, there is provided a paper thickness detection control method comprising: a step of arranging received data in a printing order; a step of determining that data for one line has been prepared; It comprises a procedure for searching for the first print, and a procedure for detecting the paper thickness when the first print comes.

According to a second aspect of the present invention, there is provided a sheet thickness detection control method.
(A) The print data transmitted from the higher-level device is arranged in the order of printing, and the data whose printing position returns halfway is inserted while the data is arranged so far, and (B) the data is arranged in the order of printing. (C) a procedure for searching for the position of the first print position for one line on the printing paper, and (D) a first print position searched for (E) a procedure for moving the paper thickness detection unit mounted on the carrier together with the print head, (E) a procedure for detecting the paper thickness at the searched first printing position, and (F) a detected paper thickness data Adjusting the distance between the sheet and the print head based on the information.

According to a third aspect of the present invention, there is provided a sheet thickness detection control method comprising:
Alternatively, in the second invention, as the printing paper, a printing paper obtained by arranging and adhering labels in a matrix on a peeling backing paper is used.

[0010]

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a flowchart showing one embodiment of the present invention. The paper thickness detection control method shown in FIG. 1 includes the steps of arranging print data transmitted from a higher-level device in the printing order, and inserting data that returns the printing position in the middle while the data has been arranged, S2: A procedure for determining that the data arranged in the printing order has become one line,
(3) A procedure for searching at which position of the printing paper the first printing position for one line is located, and S4 moving the paper thickness detecting unit mounted on the carrier together with the print head to the first printing position searched for. Step S5: detecting the sheet thickness at the first print position searched for, and step S6: adjusting the interval between the sheet and the print head based on the detected sheet thickness data.

FIG. 2 is a schematic top view showing an example of use of the present invention. The release liner 13 is sent in the direction of arrow B, and the label 1
When 5a comes under the print head 8, the carrier 10
Moves in the direction of arrow A by the belt 9 driven by the carrier drive motor 11 to reach the position where printing is first performed on the label 15a, and the paper thickness detecting unit 7 determines the thickness of the peeling backing sheet 13 and the thickness of the label 15a. The combined total thickness data is output. The head height adjusting unit 14 adjusts the distance between the label 15a and the print head based on the total thickness data.

[0013]

According to the paper thickness detection control method of the present invention, the procedure for moving the paper thickness detection unit mounted on the carrier together with the print head to the searched first printing position is provided. There is an effect that the distance from the head can be automatically adjusted so as to obtain optimum printing quality.

[Brief description of the drawings]

FIG. 1 is a flowchart illustrating an embodiment of the present invention.

FIG. 2 is a schematic top view showing one usage example of the present invention.

FIG. 3 is a schematic diagram showing an example of the related art.

[Explanation of symbols]

 7 Paper Thickness Detector 8 Print Head 9 Belt 10 Carrier 11 Carrier Drive Motor 13 Peeling Mount 14 Head Height Adjuster 15 Label

Claims (3)

[Claims] A step of arranging received data in a printing order; a step of determining that data for one line has been collected; a step of searching for a position on a print sheet at which a first print comes; And performing a sheet thickness detection when the data is received. (A) arranging print data transmitted from a higher-level device in a printing order, and inserting data that returns a printing position in the middle while the data has been arranged so far;
(B) a procedure for determining that the data arranged in the printing order has reached one line, (C) a procedure for searching which position of the printing paper has the first printing position for one line,
(D) a procedure for moving the sheet thickness detection unit mounted on the carrier together with the print head to the searched first printing position, and (E) a procedure for detecting the sheet thickness at the searched first printing position. And (F) adjusting the interval between the sheet and the print head based on the detected sheet thickness data. 3. The paper thickness detection control method according to claim 1, wherein the printing paper is formed by adhering and adhering labels in a matrix on a peeling backing paper.