If your printed code is fading, missing segments, or unreadable, this guide walks through ink delivery, stream stability, and drop charge checks.
What’s happening?
Faint or missing characters indicate poor ink delivery, unstable stream formation, or drop charge failure—all of which are common in CIJ printers like the CM750.
Typical symptoms
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Printed text looks light or broken
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Entire lines or characters missing
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Inconsistent print quality throughout the shift
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No active fault messages, but poor output
Likely causes & solutions
| Cause | Fix |
|---|---|
| Low ink pressure or flow | Check filters, run Fill Mixer |
| Dirty or partially blocked nozzle | Clean printhead and nozzle filter |
| Charge fault or electrode issue | Wipe charge electrode, check high voltage |
| Ink too viscous or expired | Verify fluid age, run Viscosity Monitoring |
Fix it in 4 steps
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Clean the nozzle and electrode using approved solvent
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Check for pressure-related warnings
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Run Fill Mixer to re-prime the ink path
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Print a test code and verify stability with a strobe or magnifier
Prevent repeat issues
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Replace filters on schedule
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Use ink before expiration
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Run Clean Ink System when changing fluids
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Train operators to inspect print quality hourly