Method of controlling reciprocal movement of hammer rank in print device
AssigneeHitachi Koki Co., Ltd.
InventorsSatoru Tobita, Yoshikane Matsumoto, Hideaki Mamiya, Yuji Ohmura
Life of this patent
Estimating the term…
Abstract
A hammer bank mounted on direct drive bearings reciprocally moves along a shaft. Springs provided at each end of the shaft supplies repulsive force to the hammer bank. When sheet feed operations for a plurality of carriage returns are performed, the hammer bank is stopped at a predetermined position away from the springs. When the reciprocal movement of the hammer bank is restarted, the hammer bank is first moved to a reverse position where the repulsive force of the spring is in the maximum. Then, the hammer bank is accelerated by utilizing the repulsive force of the spring and restarts the reciprocal movement.
Claims18
A control method of controlling an image forming device, the image forming device includes a shaft extending in a longitudinal direction, an image forming unit that is reciprocally movable along the shaft within a moving region defined by two extremes where the image forming unit reverses, the moving region including a first region, a second region, and a third region between the first region and the second region, a driving mechanism that reciprocally moves the image forming unit and urging means provided in each of the first region and the second region for urging the image forming unit toward a center of the shaft when the image forming unit is in the first region or the second region, wherein the image forming unit is brought into contact with the urging means when moved into the first region or the second region from the third region, the control method comprising the steps of:
- a) stopping the image forming unit at a predetermined position within the third region;
- and
- b) resuming reciprocal movement of the image forming unit by a driving force greater than a repulsive force of the urging means to one of the two extremes closer to the predetermined position.
A control method of controlling an image forming device including the steps of:
- moving an image forming unit in a reciprocal movement along a shaft within a first reversing region, a second reversing region and a constant velocity region positioned between the first reversing region and the second reversing region;
- stopping the image forming unit at a predetermined position within the constant velocity region when a command is executed from a device to feed a recording medium by more than a predetermined amount at one time or to change a speed pattern of reciprocal movement of the image forming unit;
- and
- resuming the reciprocal movement of the image forming unit in the third region to a closer of the first reversing region or the second reversing region by a driving force greater than a compressive force of an urging means positioned in the first reversing region and the second reversing region.
Dependencies are inferred from the claim text.