Patent ID: 9586418
Date: 2017-03-07
CPC Classifications: B41J

Claim:
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 is configured to perform a second round of the original-point determination operation after performing a first round of the original-point determination operation, wherein the timer is configured to measure, 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, and wherein in a case in which the measurement time period is equal to or shorter than a first threshold time period, the controller is configured to determine that the original-point determination operation of the head units has failed to be normally executed.