Understand how photocell trigger modes work on the CM750, when to use each one, and how to avoid double-printing or misaligned codes.
Trigger modes control when the printer prints
Your CIJ printer uses a photocell sensor to detect products as they pass the printhead. But how the printer reacts depends on the trigger mode selected.
Set the wrong one, and you’ll either double-print, miss marks, or waste ink.
Trigger Mode Overview
| Mode | Description | When to Use It |
|---|---|---|
| Trigger | Printer fires once per product detected | Most standard applications |
| Gate | Printer fires only while product is in front of sensor | Ideal for variable-length products |
| Ignore Triggers | Printer runs continuously without sensor input | Use only for continuous web or testing |
How to change trigger mode on the CM750
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Go to
Print Parameters > Trigger Mode -
Select from the list: Trigger / Gate / Ignore
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Adjust Blocking Time if needed (prevents re-triggering too soon)
Troubleshooting trigger issues
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Double printing? ➤ Increase blocking time
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Missed prints? ➤ Clean or realign the photocell
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Nothing prints at all? ➤ Check sensor wiring or mode setting
Pro tips
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Gate mode is best for irregular objects or jittery conveyors
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Ignore mode should only be used in controlled environments
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Always test print alignment after any mode change