Print device, print preparation method, and non-transitory computer-readable storage medium

Abstract

A print device includes a supply unit, a print unit, a conveyer, a tensioner, a drive unit, a processor, a medium detector, and a memory. The tensioner is configured to apply tension to the medium. The memory stores computer-readable instructions that, when executed by the processor, instruct the processor to perform processes including correction processing, which is repeated a plurality of times, of controlling the drive unit and applying the tension to the medium by the tensioner during a back-and-forth conveyance operation of conveying the medium in the return direction after conveying the medium in the conveyance direction, and detection processing of detecting attributes of the medium, based on the detection result output from the medium detector, during one of the back-and-forth conveyance operations, of the plurality of back-and-forth conveyance operations.

What is claimed is: 
     
         1 . A print device comprising:
 a supply unit configured to supply a long medium;   a print unit configured to print an image on the medium supplied from the supply unit;   a conveyer configured to convey the medium in a conveyance direction from the supply unit toward the print unit, and in a return direction opposite to the conveyance direction;   a tensioner configured to apply tension to the medium;   a drive unit configured to drive the conveyer;   a processor configured to control the print unit and the drive unit;   a medium detector configured to output a detection result of the medium to the processor; and   a memory storing computer-readable instructions that, when executed by the processor, instruct the processor to perform processes comprising:
 correction processing, which is repeated a plurality of times, of controlling the drive unit and applying the tension to the medium by the tensioner during a back-and-forth conveyance operation of conveying the medium in the return direction after conveying the medium in the conveyance direction, and 
 detection processing of detecting attributes of the medium, based on the detection result output from the medium detector, during one of the back-and-forth conveyance operations, of the plurality of back-and-forth conveyance operations. 
   
     
     
         2 . The print device according to  claim 1 , wherein
 the medium detector is a transmission type sensor or a reflection type sensor, and   the computer-readable instructions further instruct the processor to perform a process comprising:
 adjustment processing of adjusting the medium detector during another of the back-and-forth conveyance operations, of the plurality of back-and-forth conveyance operations. 
   
     
     
         3 . The print device according to  claim 2 , wherein
 the detection processing is performed after the adjustment processing.   
     
     
         4 . The print device according to  claim 1 , wherein
 the computer-readable instructions further instruct the processor to perform a process comprising:
 setting processing of setting, as a conveyance distance of the one back-and-forth conveyance operation, a longer distance of a conveyance distance required for the correction processing and a conveyance distance required for the detection processing, and setting, as a conveyance velocity of the one back-and-forth conveyance operation, a slower velocity of a conveyance velocity required for the correction processing and a conveyance velocity required for the detection processing, and 
   the correction processing includes performing the conveyance for the conveyance distance and at the conveyance velocity set in the setting processing , for at least a part of the one back-and-forth conveyance operation.   
     
     
         5 . The print device according to  claim 2 , wherein
 the computer-readable instructions further instruct the processor to perform a process comprising:
 setting processing of setting, as a conveyance distance of the other back-and-forth conveyance operation, a longer distance of a conveyance distance required for the correction processing and a conveyance distance required for the adjustment processing, and setting, as a conveyance velocity of the other back-and-forth conveyance operation, a slower velocity of a conveyance velocity required for the correction processing and a conveyance velocity required for the adjustment processing, and 
   the correction processing includes performing a conveyance for the conveyance distance and at the conveyance velocity set in the setting processing , for at least a part of the other back-and-forth conveyance operation.   
     
     
         6 . The print device according to  claim 1 , wherein
 the computer-readable instructions further instruct the processor to perform a process comprising:
 remaining amount acquisition processing of acquiring, before the correction processing, a remaining amount of the medium. 
   
     
     
         7 . The print device according to  claim 6 , further comprising:
 a tension detector configured to detect the tension applied to the medium by the tensioner, wherein   the remaining amount acquisition processing includes acquiring the remaining amount of the medium based on the tension detected by the tension detector.   
     
     
         8 . The print device according to  claim 6 , wherein
 the correction processing includes adjusting a drive amount of the drive unit in accordance with the remaining amount acquired by the remaining amount acquisition processing.   
     
     
         9 . The print device according to  claim 2 , further comprising:
 a cutting unit configured to cut the medium, wherein   the computer-readable instructions further instruct the processor to perform a process comprising:
 cutting processing of, after the other back-and-forth conveyance operation of the plurality of back-and-forth conveyance operations, driving the cutting unit and cutting the medium, after controlling the drive unit and conveying the medium in the conveyance direction to a cutting position in a state in which the tension is applied to the medium by the tensioner. 
   
     
     
         10 . The print device according to  claim 1 , wherein
 the correction processing includes, in each of the plurality of back-and-forth conveyance operations, conveying the medium in the return direction to a predetermined origin position, after conveying the medium in the conveyance direction.   
     
     
         11 . The print device according to  claim 2 , wherein
 the medium includes a base sheet and a plurality of labels adhered to the base sheet,   the correction processing includes, in each of the plurality of back-and-forth conveyance operations, conveying the medium in the return direction without applying the tension by the tensioner, after conveying the medium in the conveyance direction in a state in which the tension is applied to the medium by the tensioner,   the adjustment processing includes adjusting a threshold value used when detecting the label, based on a plurality of the detection results of the medium detector during the other back-and-forth conveyance operation, and   the detection processing includes detecting a size of the medium in the conveyance direction, based on a plurality of the detection results of the medium detector during the one back-and-forth conveyance operation and on the threshold value.   
     
     
         12 . A print preparation method performed by a processor of a print device, the method comprising:
 a correction process, which is repeated a plurality of times, of controlling a drive unit of the print device and applying tension to a long medium, using a tensioner of the print device, during a back-and-forth conveyance operation of conveying the medium in a return direction after conveying the medium in a conveyance direction, the print device including a supply unit, a print unit, a conveyer, the tensioner, the drive unit, the processor, and a medium detector, the supply unit being configured to supply the medium, the print unit being configured to print an image on the medium supplied from the supply unit, the conveyer being configured to be driven by the drive unit to convey the medium in the conveyance direction and the return direction, the conveyance direction being a direction from the supply unit toward the print unit, the return direction being a direction opposite to the conveyance direction, the tensioner being configured to apply the tension to the medium, the processor being configured to control the print unit and the drive unit, and the medium detector being configured to output a detection result of the medium to the processor; and   a detection process of detecting attributes of the medium, based on the detection result output from the medium detector, during one of the back-and-forth conveyance operations, of the plurality of back-and-forth conveyance operations.   
     
     
         13 . The print preparation method according to  claim 12 , further comprising:
 an adjustment process of adjusting the medium detector during another of the back-and-forth conveyance operations, of the plurality of back-and-forth conveyance operations, wherein   the medium detector is a transmission type sensor or a reflection type sensor.   
     
     
         14 . The print preparation method according to  claim 13 , wherein
 the detection process is performed after the adjustment process.   
     
     
         15 . The print preparation method according to  claim 12 , further comprising:
 a condition setting process of setting, as a conveyance distance of the one back-and-forth onveyance operation, a longer distance of a conveyance distance required for the correction process and a conveyance distance required for the detection process, and setting, as a conveyance velocity of the one back-and-forth conveyance operation, a slower velocity of a conveyance velocity required for the correction process and a conveyance velocity required for the detection process, wherein   the correction process includes performing the conveyance for the conveyance distance and at the conveyance velocity set in the condition setting process, for at least a part of the one back-and-forth conveyance operation.   
     
     
         16 . The print preparation method according to  claim 13 , further comprising:
 a condition setting process of setting, as a conveyance distance of the other back-and-forth conveyance operation, a longer distance of a conveyance distance required for the correction process and a conveyance distance required for the adjustment process, and setting, as a conveyance velocity of the one back-and-forth conveyance operation, a slower velocity of a conveyance velocity required for the correction process and a conveyance velocity required for the adjustment process, wherein   the correction process includes performing a conveyance for the conveyance distance and at the conveyance velocity set in the condition setting process, for at least a part of the other back-and-forth conveyance operation.   
     
     
         17 . A non-transitory computer-readable storage medium storing computer-readable instructions that are executed by a processor of a print device, the computer-readable instructions performing processes comprising:
 correction processing, which is repeated a plurality of times, of controlling a drive unit of the print device and applying tension to a long medium, using a tensioner of the print device, during a back-and-forth conveyance operation of conveying the medium in a return direction after conveying the medium in a conveyance direction, the print device including a supply unit, a print unit, a conveyer, the tensioner, the drive unit, the processor, and a medium detector, the supply unit being configured to supply the medium, the print unit being configured to print an image on the medium supplied from the supply unit, the conveyer being configured to be driven by the drive unit to convey the medium in the conveyance direction and the return direction, the conveyance direction being a direction from the supply unit toward the print unit, the return direction being a direction opposite to the conveyance direction, the tensioner being configured to apply the tension to the medium, the processor being configured to control the print unit and the drive unit, and the medium detector being configured to output a detection result of the medium to the processor; and   detection processing of detecting attributes of the medium, based on the detection result output from the medium detector, during one of the back-and-forth conveyance operations, of the plurality of back-and-forth conveyance operations.   
     
     
         18 . The non-transitory computer-readable storage medium to  claim 17 , wherein:
 the medium detector is a transmission type sensor or a reflection type sensor, and   the computer-readable instructions further instruct the processor to perform a process comprising:
 adjustment processing of adjusting the medium detector during another of the back-and-forth conveyance operations, of the plurality of back-and-forth conveyance operations. 
   
     
     
         19 . The non-transitory computer-readable storage medium according to  claim 18 , wherein
 the detection processing is performed after the adjustment processing.   
     
     
         20 . The non-transitory computer-readable storage medium according to  claim 17 , wherein:
 the computer-readable instructions further instruct the processor to perform a process comprising:
 setting processing of setting, as a conveyance distance of the one back-and-forth conveyance operation, a longer distance of a conveyance distance required for the correction processing and a conveyance distance required for the detection processing, and setting, as a conveyance velocity of the one back-and-forth conveyance operation, a slower velocity of a conveyance velocity required for the correction processing and a conveyance velocity required for the detection processing, wherein 
 the correction processing includes performing the conveyance for the conveyance distance and at the conveyance velocity set in the setting processing, for at least a part of the one back-and-forth conveyance operation. 
   
     
     
         21 . The non-transitory computer-readable storage medium according to  claim 18 , further comprising:
 the computer-readable instructions further instruct the processor to perform a process comprising:
 setting processing of setting, as a conveyance distance of the other back-and-forth conveyance operation, a longer distance of a conveyance distance required for the correction processing and a conveyance distance required for the adjustment processing, and setting, as a conveyance velocity of the one back-and-forth conveyance operation, a slower velocity of a conveyance velocity required for the correction process and a conveyance velocity required for the adjustment processing, wherein 
   the correction processing includes performing a conveyance for the conveyance distance and at the conveyance velocity set in the setting processing, for at least a part of the other back-and-forth conveyance operation.