Effects of firing frequency and trigger voltage on inkjet printing performance using a CPLD control circuit
碩士 === 國立中興大學 === 精密工程學系所 === 95 === This thesis proposes a technique to evaluate the relationship between ink-jet printing quality and the driving signal based on two kinds of experiments: observation of the ink trajectory and measurement of the ink droplet weight. Different trigger voltages and fi...
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| Format: | Others |
| Language: | zh-TW |
| Online Access: | http://ndltd.ncl.edu.tw/handle/82905877341446592798 |
| Summary: | 碩士 === 國立中興大學 === 精密工程學系所 === 95 === This thesis proposes a technique to evaluate the relationship between ink-jet printing quality and the driving signal based on two kinds of experiments: observation of the ink trajectory and measurement of the ink droplet weight. Different trigger voltages and firing frequencies have large effects on the droplet size ejected from the printhead and thus directly affect the printing quality. In the hardware design, a complex programmable logic device (CPLD) integrated with a driving circuit was used to control the trigger voltage and firing frequency for an HP-27 printhead. The ejected droplet weight was investigated in term of the relationship between the droplet size and driving voltage/frequency.
It was found that the excessive frequency or inappropriate voltage will lead to an unstable ejecting phenomenon and degrade the printing quality. We have tried to find the operation range (i.e. driving voltage and frequency) to ensure a stable working condition for the inkjet printhead. The ink used in this research possesses surface tension of 56.5
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