Method of Testing a Droplet Discharge Device
AssigneeBrother Kogyo Kabushiki Kaisha
InventorsNaoto Iwao, Shin Ishikura
Life of this patent
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Abstract
A test sheet is set in a droplet discharge device at a first distance. At least one droplet is discharged toward the test sheet from a nozzle formed in the droplet discharge device to form at least one first dot on the test sheet. The test sheet is set in the droplet discharge device at a second distance differing from the first distance. At least one droplet is discharged toward the test sheet from the nozzle to form at least one second dot on the test sheet. A nozzle position error or a nozzle discharge angle error are calculated from the position of the first dot, the position of the second dot, the first distance, and the second distance. Testing inkjet heads in this manner allows accurate testing for errors in nozzle position or discharge angle.
Claims22
A method of testing a droplet discharge device, comprising:
- a first step of setting a test sheet at a first distance from the droplet discharge device;
- a second step of discharging at least one droplet toward the test sheet set in the first step from a nozzle formed in the droplet discharge device to form at least one first dot on the test sheet;
- a third step of setting a test sheet at a second distance from the droplet discharge device, the second distance being different from the first distance;
- a fourth step of discharging at least one droplet toward the test sheet set in the third step from the nozzle to form at least one second dot on the test sheet;
- and
- a fifth step of calculating at least either position error of the nozzle or discharge angle error of the nozzle from the position of the first dot, the position of the second dot, the first distance and the second distance.
A method of testing a droplet discharge device, comprising:
- a first step of setting a test sheet at a first distance from the droplet discharge device:
- a second step of discharging at least one droplet toward the test sheet set in the first step from each of a plurality of nozzles respectively formed in the droplet discharge device to form a first dot distribution pattern on the test sheet;
- a third step of setting a test sheet at the first distance from the droplet discharge device;
- a fourth step of discharging at least one droplet toward the test sheet set in the third step from each of the plurality of nozzles respectively to form a second dot distribution pattern on the test sheet, wherein the test sheet is moved within a sheet plane in at least either the second or fourth step and the moving speeds differ in the second step and the fourth step;
- and
- a fifth step of comparing the first dot distribution pattern and the second dot distribution pattern and determining the discharge velocity variance of the plurality of nozzles.
Dependencies are inferred from the claim text.