Calibration method for printing apparatus
US7387357B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 2005 |
| Grant date | Jun 17, 2008 |
| Priority date | — |
| Expiry date | Jan 12, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/393
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A calibration method for a printing apparatus is disclosed. The printing apparatus has at least one ink pen and a carriage for scanning the ink pen across a printing region. The calibration method includes: (a) printing a test pattern across a print medium at a constant carriage velocity; (b) optically scanning the printed test pattern to obtain a sensor signal thereof; (c) setting the carriage velocity so that there are acceleration, deceleration and constant velocity printing regions; (d) printing the same test pattern; (e) optically scanning the subsequent test pattern to obtain a sensor signal thereof; (f) comparing the sensor signals of the two test patterns to determine ink dot placement errors; and (g) calibrating time-delay compensation values based on the dot placement errors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.