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RECORDING POSITION CONTROL DEVICE AND ABNORMALITY DETECTING METHOD FOR SAME

  • US 20160114576A1
  • Filed: 10/26/2015
  • Published: 04/28/2016
  • Est. Priority Date: 10/27/2014
  • Status: Active Grant
First Claim
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1. A recording position control device, comprising:

  • a plurality of head units arranged in a conveyance direction of a recording medium, to discharge ink droplets on to the recording medium to form an image on the recording medium;

    a plurality of edge sensors to detect a meandering amount of the conveyed recording medium in conveyance;

    a plurality of head movers mounted on the head units, respectively, to finely move the head units in a main scanning direction;

    a controller to perform an original-point determination operation of moving the head units to an original point, which is a reference position of the head units, and to control the head movers to move the head units in a direction to correct meandering of the recording medium, according to the meandering amount detected based on outputs of the edge sensors; and

    a timer to measure a time period from when the controller outputs an execution command of a movement to the head movers to when the controller receives from the head movers a completion status indicating that the movement is completed,wherein the controller performs a second round of the original-point determination operation after performing a first round of the original-point determination operation,wherein the timer measures, as a measurement time period, a time period from when the controller issues an execution command of the second round of the original-point determination operation to when the controller receives a completion status of the second round of the original-point determination operation, andwherein in a case in which the measurement time period is equal to or shorter than a first threshold time period, the controller determines that the original-point determination operation of the head units has failed to be normally executed.

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