JP2019077540A - Print control device, positioning control device, positioning control method and positioning control program - Google Patents

Abstract

To accurately control positioning of a label with respect to a thermal head even when fan-fold paper obtained by folding a perforation part is used.SOLUTION: A print control device includes: a reflective sensor S for outputting reflection level data L changing with time accompanying the movement of a printing sheet 50; determination means 3 which determines whether or not a detection value of the reflective sensor S exceeds a preset first reference value (1) and a second reference value (2) smaller than the first reference value (1) on the basis of the reflection level data L output from the reflective sensor S; and mark decision means 4 which decides whether or not a reference mark M on the printing sheet 50 is normal by comparing the length of a duration time of the reflection level data exceeding the second reference value (2) with a preset reference mark width when the determination means 3 determines that the detection value of the reflective sensor S exceeds only the second reference value (2).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a printing control apparatus, an alignment control apparatus, an alignment control method, and an alignment control program capable of optimally controlling a label printing position on fanfold paper.

In a label printer, printing is performed by a thermal head on a label sheet drawn by a paper feed roller.
As this label sheet, there may be used fanfold paper which has perforations at regular intervals and is folded at the perforations. Between perforations on the fanfold paper, a plurality of labels printed by a label printer are continuously affixed at predetermined intervals.
And, in such fanfold paper, since a plurality of labels are continuously arranged in a row, position control for performing the heading processing of the labels and the printing process on the labels becomes important.
For this reason, in the label printer described above, a black mark (reference mark) is attached on the back side of the fanfold paper as a mark for label heading, and light reflection from the black mark is reflected by an optical sensor such as a reflection sensor. By detecting, delivery control of the label to the thermal head is performed.

  Label printers shown in Patent Documents 1 and 2 are known as a technique related to label positioning control using such fanfold paper.

In the label printer disclosed in Patent Document 1, a first threshold value for detecting a sheet portion between labels, which is determined according to a mode value of a sensor output value (a normal sheet surface detection signal), The sheet position and the seam position of the sheet are specified using a value larger than one threshold value and a second threshold value for detecting the holes in the label sheet.
The label printer disclosed in Patent Document 2 has an optical sensor for detecting a detection mark on a sheet advancing in a predetermined direction, and based on the output of the optical sensor, the advancing distance of the sheet exceeding the detection threshold is the second. If it is smaller than the predetermined distance, it is determined that only the detection mark is detected, and if the advancing distance of the sheet exceeding the detection threshold is equal to or more than the second predetermined distance, it is determined that the detection mark and the perforation of the sheet are detected. .

JP 2013-22861 A JP, 2011-68076, A

  By the way, in the techniques shown in Patent Documents 1 and 2, it is intended to detect the label position and the position of the perforation using the threshold value on the normal sheet surface, but for example, the printing sheet is a fanfold sheet In this case, there is a problem that the correct position can not be detected.

Specifically, as shown in FIGS. 10A and 10B, a plurality of labels 53 are attached at predetermined intervals as a print sheet 50 to a mount 52 having foldable perforations 51 at regular intervals. When the used fanfold paper F is used, the print sheet 50 has a mountain shape due to the fold at the perforation 51, and the distance m from the print sheet 50 to the reflection sensor S increases and the light reception level decreases. There is a problem of
As a result, in the above-described technology, the tip of the reference mark (not shown) on the printing sheet 50 can not be properly positioned on the thermal head H, causing problems in label printing, or an extra blank paper feed. In some cases, improvements have been expected in this regard.

  The present invention has been made in view of the above-described circumstances, and is a printing control apparatus capable of accurately controlling the positioning of a label with respect to a thermal head even if fanfold paper folded at a perforation is used. And an alignment control device, an alignment control method, and an alignment control program.

  In order to solve the above-mentioned subject, in the printing control device shown in the 1st mode of the present invention, the surface state of the printing sheet sent out one by one by the paper feeding roller is measured, and it changes temporally with movement of the printing sheet. Detection value as an optical reception level data and an optical sensor that outputs the optical reception level data output from the optical sensor, a detection value of the optical sensor is greater than a first reference value and the first reference value which are set in advance. In the determination means for determining whether or not the small second reference value is exceeded, and in the determination means, it is determined whether the detection value of the optical sensor exceeds both the first and second reference values. Accordingly, the comparison result with the first and second reference or the length of the duration of the light reception level data exceeding any of the reference values corresponds to the preset reference mark width. Duration and And a mark determination unit that determines whether the reference mark attached to the print sheet is normal or not by comparison.

  In the alignment control device according to the second aspect of the present invention, the surface condition of the sheet to be conveyed sequentially fed by the paper feed roller is measured, and the amount of light received changes with time as the sheet to be conveyed moves. A first reference value which is detected by the optical sensor in advance and a second reference value which is smaller than the first reference value based on the optical sensor which outputs as level data and the light receiving level data which is output from the optical sensor And the determination means determines whether or not the detection value of the optical sensor exceeds both of the first and second reference values. 1. Comparison result with the second reference value, or further, the duration of the light reception level data exceeding any of the reference values is compared with the duration corresponding to the preset reference mark width To do More, the reference mark provided to said conveying sheet is characterized by having a and determining mark determination means for determining whether or not normal.

  In the alignment control method according to the third aspect of the present invention, an optical sensor that measures the surface condition of the sheet to be conveyed sequentially fed by the paper feed roller receives light that changes with time as the sheet to be conveyed moves. A data collection step of taking in an amount as light reception level data, and a first reference value and a first reference value smaller than the first reference value which is detected by the optical sensor based on the light reception level data output from the optical sensor [2] It is determined whether or not the detection value of the optical sensor exceeds both of the first and second reference values in this determination step of the determination step of determining whether or not the reference value is exceeded, and the determination result Accordingly, according to the comparison result with the first and second reference values, or further, the duration of the light reception level data exceeding any of the reference values is set to the reference mark width set in advance. versus By comparing the duration to a reference mark provided to said conveying sheet is characterized by having a a mark determination step determines whether or not regular.

In the alignment control program according to the fourth aspect of the present invention, an optical sensor that measures the surface state of the conveyed sheet sequentially fed by the paper feed roller receives light that changes with time as the conveyed sheet moves. Data collection stage for capturing the amount as received light level data;
Based on the light reception level data output from the optical sensor, it is determined whether the detection value of the optical sensor exceeds a first reference value set in advance and a second reference value smaller than the first reference value. In the determination step and in this determination step, it is determined whether or not the detected value of the optical sensor exceeds both the first and second reference values, and according to the determination result, the first and second reference values are determined. As a result of comparison with the above, or further, the length of the duration of the light reception level data exceeding any of the reference values is compared with the duration corresponding to the preset reference mark width. And a mark determination step of determining whether the reference mark attached to the transport sheet is normal or not.

  In the present invention, even when using a fanfold paper in which perforations are folded, positioning control of the label relative to the thermal head can be accurately performed.

It is a figure for demonstrating the printing control apparatus of this invention, Comprising: The correspondence figure of the reflection level data and printing sheet when the detection value of a reflection sensor exceeds both of two reference values, (B) It is the schematic which shows the state of the printing sheet which exists in a printing path. FIG. 2 is a drawing for explaining the printing control apparatus of the present invention following FIG. 1 and (A) a correspondence diagram of reflection level data and printing sheet when the detection value of the reflection sensor exceeds only one reference value; (B) It is the schematic which shows the state of the printing sheet in a printing path | route. It is drawing which concerns on 1st Embodiment of this invention, Comprising: (A) Correspondence figure of the reflection level data and printing sheet when the detection value of a reflection sensor exceeds only one reference value, (B) As a printing sheet It is a perspective view which shows the used fanfold paper, (C) It is the schematic which shows the state of the printing sheet in a printing path. It is a graph which shows reference | standard reflection level data preset. It is a graph which shows reflection level data when a detected value of a reflective sensor exceeds both of two standard values. It is a graph which shows reflection level data at the time of using a printing sheet which does not have perforations. It is drawing which concerns on 2nd Embodiment of this invention, Comprising: The graph which shows reflection level data when the detection value of a reflection sensor exceeds only one reference value, The reference set as (B) reference data It is a graph which shows reflection level data. It is drawing relevant to 2nd Embodiment, Comprising: The graph which shows reflection level data when the detection value of a reflection sensor exceeds two reference values by a short peak, (B) The reference set as reference data It is a graph which shows reflection level data. It is drawing relevant to 2nd Embodiment, Comprising: The graph which shows reflection level data when the detection value of a reflection sensor exceeds two reference values by a long peak, The reference set as (B) reference data It is a graph which shows reflection level data. (A) A figure which shows the problem in transferring a printing sheet, (B) It is a perspective view which shows the fanfold paper used as a printing sheet.

The print control apparatus 1 according to the present invention will be described with reference to FIGS. 1 (A) and 1 (B) and FIGS. 2 (A) and 2 (B).
The print control device 1 determines the state of the print sheet 50 based on the output of the reflection sensor S that measures the surface state of the print sheet 50 sent out in the direction of arrow a by the paper feed roller 2. Means 3 and mark determination means 4 for determining whether or not the reference mark M attached to the print sheet 50 is normal based on the determination result of the determination means 3.

  Specifically, as shown in FIG. 1 (A) and FIG. 2 (A) as the printing sheet 50, a plurality of labels 53 are provided at predetermined intervals on a mount 52 having foldable perforations 51 at constant intervals. The affixed fanfold paper F is used. The label 53 is disposed between the perforations 51 and at a constant distance from the perforations 51.

The determination means 3 is configured such that, based on the reflection level data L output from the reflection sensor S, the detection value of the reflection sensor S is smaller than the first reference value (A) and the first reference value (A) set in advance. 2 Determine whether the standard value (b) is exceeded.
Thereafter, in the mark determination means 4, when the determination means 3 determines that the detection value of the reflection sensor S exceeds both the first reference value (A) and the second reference value (B), the printed sheet It is determined that the reference mark M attached to is normal (that is, it is not an erroneous detection of a deposit such as dust or dirt) (see FIG. 1).
In the situation where the detection value of the reflection sensor S exceeds both the first reference value (A) and the second reference value (B), as shown in FIG. It means that the reference mark M on the printing sheet 50 and the reflection sensor S are not separated.

  Further, in the mark determination means 4, when the determination means 3 determines that the detection value of the reflection sensor S exceeds only the second reference value (b), the reflection level exceeding the reference value (b) Whether the reference mark M attached to the print sheet 50 is normal by comparing the duration T of the data L with the length of time (not shown) corresponding to the reference mark width set in advance It is determined whether or not (see FIG. 2).

In the situation where the detection value of the reflection sensor S exceeds only the second reference value (b), as shown in FIG. 2 (B), the reference on the printing sheet 50 is obtained by folding the printing sheet 50. This means that the distance m between the mark M and the reflection sensor S is large, and the light reception level is low.
Under this situation, the mark determination unit 4 uses “the duration T of the reflection level data L” which exceeds the second reference value (b), which has less variation due to the distance m, as the mark determination factor, Based on the duration T of the reflection level data L, it is determined whether the mark on the printing sheet 50 is a regular reference mark M or not.

In the printing control apparatus 1 configured as described above, the determination unit 3 determines the first reference value in which the detection value of the reflection sensor S is preset based on the reflection level data L output from the reflection sensor S. (A) and whether or not a second reference value (B) smaller than the first reference value (A) is exceeded is determined.
Thereafter, in the mark determination means 4, when the determination means 3 determines that the detection value of the reflection sensor exceeds both the first reference value (A) and the second reference value (B), the printing sheet 50 is attached. It is determined that the reference mark that has been sent is normal.
Further, in the mark determination means 4, when the determination means 3 determines that the detection value of the reflection sensor S exceeds only the second reference value (b), the continuation of the reflection level data L exceeding the reference value is continued. It is determined whether the reference mark M attached to the print sheet 50 is normal or not by comparing the time length T with the length of time (not shown) corresponding to the preset reference mark width. .

That is, in the present invention, as shown in FIG. 1 and FIG. 2, in the situation where the fanfold paper F in which the printing sheet 50 is folded at the perforation 51 is used, the printing sheet is folded by the fold attached to the perforation 51. Even when the distance m between the reference mark M on the F. 50 and the reflection sensor S becomes large, the duration time T of the reflection level data L exceeding the second reference value (b) (with little variation due to the distance m) It is possible to determine whether the mark on the print sheet 50 is the normal reference mark M or not.
As a result, in the printing control apparatus 1 of the present invention, even when the fanfold paper F folded at the perforation 51 is used, the positioning control of the tip of the reference mark M with respect to the thermal head H can be accurately performed.
In addition, it is not limited to using reflective sensor S which irradiates signal light and detects the reflected light as an optical sensor, You may use the image sensor which reads the reference mark M by a picked-up image.

First Embodiment
A print control apparatus 100 according to the first embodiment, which further embodies the print control apparatus 1, will be described with reference to FIGS. 3 to 6.
The reflection sensor S, the paper feed roller 2 and the thermal head H described above constitute a printing apparatus 10, and the printing control apparatus 100 according to the first embodiment is applied to the printing apparatus 10.
In the printing apparatus 10, as shown in FIG. 3C, the paper feed roller 2 located downstream of the reflection sensor S and the thermal head H are disposed in a positional relationship sandwiching the printing sheet 50, and the paper The rotation of the feed roller 2 feeds the print sheet 50 in the direction of arrow a.

The print control device 100 measures the surface condition of the print sheet 50 sent out by the paper feed roller 2 in the direction of the arrow a by a reflection state of light (for example, a detection level corresponding to the amount of received light) Judgment means 13 for judging the delivery state (that is, whether there is a fold or straightness) of the printing sheet 50 based on the output of the sensor S, and the reference mark attached to the printing sheet 50 based on the judgment result of the judgment means 13 Mark determination means 14 for determining whether M is normal or not.
The reflection sensor S uses an element in which the detected value (Volt) is increased when a black area with little reflection is detected, and the detected value is decreased when a white area with a large amount of reflection is detected.

  Further, as shown in FIGS. 3A and 3B, a fan-fold in which a plurality of labels 53 are attached at a predetermined interval to a backing sheet 52 having foldable perforations 51 at regular intervals as the printing sheet 50. Paper F is used. The label 53 is disposed at a constant distance from the perforation 51, and a reference mark M as a reference for alignment to the thermal head H is at the front end on the back side of the label 53 and in the vicinity of the perforation 51. Each one is attached.

  When the print sheet 50 is supplied in the direction of the arrow a, the determination means 13 sets the detection value of the reflection sensor S to a first reference value (i.e., the first reference value (i) And a second reference value (b) smaller than the first reference value (b) is determined.

  Thereafter, in the mark determination means 14, when the determination means 13 determines that the detection value of the reflection sensor S exceeds both the first reference value (A) and the second reference value (B), the printed sheet It is determined that the fiducial mark M attached to is normal (that is, it is not a deposit such as dust).

  In the situation where the detection value of the reflection sensor S exceeds both the first reference value (A) and the second reference value (B), the fanfold paper F is used as indicated by a symbol D1 in FIG. This means that there is no crease in the printed sheet 50, and the reference mark M and the reflection sensor S on the printed sheet 50 are not separated.

  When the mark determination unit 14 determines that the reference mark M attached to the print sheet 50 is normal, the reference feed amount set in advance (for example, between the reflection sensor S and the thermal head H) is determined. The reference mark M on the printing sheet 50 positioned on the reflection sensor S is fed to the thermal head H based on the reference dimension of 58.6 mm. The feed of the print sheet 50 in the direction of the arrow a based on the reference mark M is performed by the print driving means shown by reference numeral 15 in FIG. 3C.

Further, in the mark determination means 14, when the determination means 13 determines that the detection value of the reflection sensor S exceeds only the second reference value (b), the reflection level data exceeding the reference value (b) It is determined whether the reference mark M attached to the print sheet 50 is normal or not by comparing the duration T of L with the corresponding reference mark width TA set in advance (FIG. 3 (FIG. See A).
Further, the comparison here is normal or not depending on whether or not the continuation time length T of the reflection level data L is a predetermined reference mark width TA and a size within 10%, for example. judge.

In the situation where the detection value of the reflection sensor S exceeds only the second reference value (ii), as shown in FIG. 3 (A) as the code D2 and FIG. 3 (C), the fold attached to the printing sheet 50 This means that the distance m between the reference mark M on the printing sheet 50 and the reflection sensor S is increased by the wrinkles.
Under this situation, the mark determination unit 14 uses “the duration T of the reflection level data L” which exceeds the second reference value (b), which has less variation due to the distance m, as a determination factor. Based on the duration T of the reflection level data L, it is determined whether the mark on the print sheet 50 is a regular reference mark M or not.

  Further, in the setting mode in which the printing sheet 50 is fed with blank paper at the start of printing, as shown in FIG. 4, the reference mark width TA reads the first reference mark M by the reflection sensor S, and the second reference value (b) It is set by measuring in advance how long the duration time of the reference reflection level data L 'exceeds. Further, such reference mark width TA is set each time the printing sheet 50 is replaced.

Then, in the printing control apparatus 100 configured as described above, the determination means 13 determines the first reference value in which the detection value of the reflection sensor S is preset based on the reflection level data L output from the reflection sensor S. (A) and whether or not a second reference value (B) smaller than the first reference value (A) is exceeded is determined.
Thereafter, in the mark determination means 14, when the determination means 13 determines that the detection value of the reflection sensor exceeds both the first reference value (A) and the second reference value (B), the printing sheet 50 is attached. It is determined that the set reference mark M is normal.
Further, in the mark determination means 14, when the determination means 13 determines that the detection value of the reflection sensor S exceeds only the second reference value (b), the continuation of the reflection level data L exceeding the reference value is continued. Whether the reference mark M attached to the print sheet 50 is normal or not is determined by comparing whether or not the time length T is within 10% of the reference mark width TA.

That is, in the present embodiment, as shown in FIG. 3, in the situation where the fanfold paper F folded at the perforation 51 is used as the printing sheet 50, the printing sheet 50 is folded by the fold attached to the perforation 51. Even if the distance m between the reference mark M and the reflection sensor S becomes large, the duration time of the reflection level data L exceeding the second reference value (b) (with little variation due to the distance m) Based on the size T, it can be determined whether the mark on the print sheet 50 is the regular reference mark M or not.
As a result, in the printing control apparatus 100 according to the present embodiment, even when the fanfold paper F folded at the perforation 51 is used, the positioning control of the label 53 with respect to the thermal head H can be accurately performed.

  In the printing control apparatus 100 according to the present embodiment, as an example of the printing sheet 50 having the perforations 51, roll paper, not foldable fanfold paper F as shown in FIGS. 5A and 5B. It is also possible to use R.

Further, in the above embodiment, the foldable fanfold paper F or roll paper R containing perforations 51 is used as the printing sheet 50, but the invention is not limited thereto, as shown in FIGS. 6A and 6B. Roll paper R having no perforations 51 may be used.
Then, in the printing control apparatus 100 of the present embodiment, after using the roll paper R having no such perforations 51, the distance m between the reference mark M on the printing sheet 50 and the reflection sensor S becomes large. Even if a float (level change as indicated by the alternate long and short dash line e) occurs, the mark on the print sheet 50 is normal based on the duration T of the reflection level data L exceeding the second reference value (b). It can be judged whether or not it is the reference mark M of.
As a result, in the printing control apparatus 100 according to the present embodiment, the positioning control of the label 53 with respect to the thermal head H can be accurately performed regardless of the type of printing sheet 50 used.

  In the case where the mark determination means 14 determines that the reference mark M attached to the print sheet 50 is not normal (that is, it is determined that the object to be detected is not the reference mark but adherent such as dust). Then, the printing process is not performed on the corresponding label 53, and a blank paper feed for feeding the next label 53 is performed.

Although the printing sheet 50 is used as the conveyed sheet in the present embodiment, the present invention is not limited to this, and a long object such as an ink ribbon or a magnetic tape may be positioned.
Further, in the present embodiment, the alignment control method and the alignment control program set in the print control apparatus 100 are executed.

Second Embodiment
A print control apparatus 100 according to the second embodiment will be described with reference to FIGS. 7 to 9.
The difference between the printing control apparatus 100 of the second embodiment and the first embodiment is that the judging means 13 and the mark judging means 14 judge that the reference mark M attached to the print sheet 50 is normal. After that, the reference feed amount for sending the printing sheet 50 to the thermal head H (for example, 58.6 mm as the reference dimension of the reflection sensor S and the thermal head H) is appropriately corrected.

For example, in the setting mode at the start of printing, as shown in FIGS. 7B, 8B, and 9B, the first reference mark M is read by the reflection sensor S, and the second reference value is obtained. (B) Measure the duration (TA) of the reference reflection level data L 'that has exceeded.
At this time, in the setting mode, a reference correction width (A1) indicating a time width from the start point 20 of the reference reflection level data L ′ which exceeds the second reference value (b) to the change point 21 located halfway to the peak A peak width (A2) indicating a time width from the change point 21 to the peak end point 22 is obtained.

The duration (TA) of the reference reflection level data L 'exceeding the second reference value (b) is constituted by the reference correction width (A1) and the peak width (A2) obtained here.
Further, the change point 21 of the reference reflection level data L ′ appears due to the presence of the perforation 51 which does not reflect light in the vicinity of the reference mark M in the printing sheet 50.

  Then, in the printing control apparatus 100 of the second embodiment, when it is determined that the printing sheet 50 having the perforations 51 is used and the reference mark M attached to the printing sheet 50 is normal, as shown in FIG. A) Reference feed amount for sending the tip of the reference mark of the print sheet 50 to the thermal head H based on the reflection level data L output from the reflection sensor S shown in FIG. 8A or FIG. 9A 58.6 mm) may be changed as follows.

  Specifically, as shown in FIG. 7A, in the case of the printing sheet 50 which exceeds only the second reference value (b), when feeding the printing sheet 50, from the starting point 30 of the second reference value (b). The paper feed of “reference feed amount (58.6 mm) + reference correction width (A1)” is performed in consideration of the length up to the tip point 31 of the reference mark M. This makes it possible to improve the positioning accuracy of the printing sheet 50 on the thermal head H based on the reference mark M.

Further, as shown in FIG. 8A, in the print sheet 50 exceeding the first reference value (A) and the second reference value (B), for example, a slight lift or the like occurs on the print sheet 50. ) When it is determined that the peak width exceeding the first reference value (A) is extremely small (for example, 10% or more smaller than the normal peak width, etc.) The paper feed of “reference feed amount (58.6 mm) + reference correction width (A1)” is performed in consideration of the length from the start point 30 of the reference value (b) to the tip point 31 of the reference mark M. This makes it possible to improve the positioning accuracy of the printing sheet 50 on the thermal head H based on the reference mark M.
In addition, it is not limited to the processing as mentioned above, As shown in FIG. 9 (A), about the printing sheet 50 which exceeded the 1st reference value (A) and the 2nd reference value (B) by normal peak width. The feed amount of the print sheet 50 may be set as the “reference feed amount (58.6 mm)” from the start point 32 of the first reference value (a).

  As described above in detail, in the printing control apparatus 100 according to the second embodiment, according to the shape of the reflection level data L, the feed amount of the printing sheet 50 from the start point 30 of the second reference value Since the setting can be changed to “amount (58.6 mm) + reference correction width (A1)”, even if the printing sheet 50 having the perforations 51 is used, the thermal head H of the printing sheet 50 based on the reference mark M is used. It is possible to maintain the positioning of the object with high accuracy.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes and the like within the scope of the present invention are also included.

  The present invention relates to a printing control apparatus, an alignment control apparatus, an alignment control method, and an alignment control program capable of optimally controlling a label printing position on fanfold paper.

DESCRIPTION OF SYMBOLS 1 print control device 2 paper feed roller 3 determination means 4 mark determination means 10 printing device 13 determination means 14 mark determination means 15 print control means 50 print sheet 51 perforation 53 label 100 print control device S reflection sensor H thermal head L reflection ( Received light) level data

Claims (9)

An optical sensor which measures the surface condition of a printing sheet sequentially fed by a paper feeding roller, and outputs as a light reception level data an amount of received light which changes with time as the printing sheet moves;
Based on the light reception level data output from the optical sensor, it is determined whether the detection value of the optical sensor exceeds a first reference value set in advance and a second reference value smaller than the first reference value. Judgment means,
According to the determination result whether or not the detection value of the optical sensor exceeds both of the first and second reference values by this determination means, the comparison result with the first and second reference values, or And a reference attached to the print sheet by comparing the duration of the light reception level data exceeding any reference value with the duration corresponding to the preset reference mark width. A print control apparatus, comprising: mark determination means for determining whether a mark is normal or not.   The determination means determines that the reference mark attached to the print sheet is normal when the detected value exceeds both the first and second reference values and further exceeds the first reference value for a predetermined duration or longer. The duration of the light reception level data is within a predetermined range when it is determined that the detection value exceeds only the second reference value or exceeds the first reference value by less than a predetermined time. The printing control apparatus according to claim 1, wherein the printing control apparatus is determined to be normal according to The printing sheet is a fanfold paper having foldable perforations at regular intervals and in which a plurality of labels printed by a thermal head are continuously applied between the perforations.
The print control apparatus according to any one of claims 1 and 2, wherein the reference mark is attached near the perforations.   When the mark determination unit determines that the reference mark attached to the print sheet is normal, the paper feeding unit is driven based on a reference feed amount set in advance to the optical sensor. The printing control device according to any one of claims 1 to 3, further comprising: a print driving unit that feeds the tip of the positioned reference mark to a thermal head.   When the printing sheet is a fanfold paper, the printing drive unit performs the printing based on the reference correction width from the rising of the reference mark width to the change point positioned halfway to the peak, which is stored in advance. 5. The printing control apparatus according to claim 4, further comprising feed amount correction means for correcting a reference feed amount for feeding the sheet to the thermal head.   The reference mark width and the reference correction width to be compared with the duration of the light reception level data exceeding the second reference value are set in a setting mode at the start of printing. Print control device. An optical sensor that measures the surface condition of the conveyed sheet sequentially fed by the paper feed roller, and outputs, as light reception level data, a light reception amount that changes with time as the conveyed sheet moves;
Based on the light reception level data output from the optical sensor, it is determined whether the detection value of the optical sensor exceeds a first reference value set in advance and a second reference value smaller than the first reference value. Judgment means,
According to the determination result whether or not the detection value of the optical sensor exceeds both of the first and second reference values by this determination means, the comparison result with the first and second reference values, or Furthermore, the length of the duration of the light reception level data exceeding any of the reference values is attached to the conveyed sheet by comparing the duration with the preset reference mark width. And a mark determining unit that determines whether the reference mark is normal or not. A data collection step of taking in, as light reception level data, a light reception amount that changes with time as the sheet to be conveyed moves from an optical sensor that measures the surface state of the sheet to be conveyed sequentially fed by a paper feed roller;
Based on the light reception level data output from the optical sensor, it is determined whether the detection value of the optical sensor exceeds a first reference value set in advance and a second reference value smaller than the first reference value. Judgment stage,
At this determination stage, it is determined whether or not the detected value of the optical sensor exceeds both of the first and second reference values, and comparison with the first and second reference values is made according to the determination result. As a result, or further, the length of the duration of the light reception level data exceeding any of the reference values is compared with the duration corresponding to the reference mark width set in advance. And a mark determination unit that determines whether the attached reference mark is normal or not. A data collection step of taking in, as light reception level data, a light reception amount that changes with time as the sheet to be conveyed moves from an optical sensor that measures the surface state of the sheet to be conveyed sequentially fed by a paper feed roller;
Based on the light reception level data output from the optical sensor, it is determined whether the detection value of the optical sensor exceeds a first reference value set in advance and a second reference value smaller than the first reference value. Judgment stage,
At this determination stage, it is determined whether or not the detected value of the optical sensor exceeds both of the first and second reference values, and comparison with the first and second reference values is made according to the determination result. As a result, or further, the length of the duration of the light reception level data exceeding any of the reference values is compared with the duration corresponding to the reference mark width set in advance. And a mark determining step of determining whether the attached reference mark is normal or not.

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