A UV curing conveyor that runs on its own front-panel settings is a standalone machine sitting in a line. Wiring it into the line’s PLC turns it into a controlled process step, one that can refuse to cure, log what it did, and stop when something upstream goes wrong.
Q: Can a UV curing conveyor be controlled by a PLC?
A: On Incure’s CDM™ conveyor, yes for LED lamp heads and no for mercury-arc heads. The L64, L88, M51, and M62 LED heads accept PLC, RS-232, and foot-switch inputs with switchable timer or continuous modes. The F-series arc heads have no external control port, and belt speed is their only control.
Decide on Control Before Choosing the Lamp Head
Because the control interface comes with the lamp head, line integration is a selection criterion, not an add-on. A line designed around a PLC should treat “LED head” as a requirement early, before comparing intensities or widths. If the adhesive needs broadband or UVC exposure that only an arc head provides, the integration plan has to work around a station with no external control port — usually with interlocks on the surrounding equipment rather than on the lamp.
The Three Interfaces and What Each Is For
- PLC input. Lets the line controller switch the lamp as part of a sequence, such as lamp on when the line is running and parts are present, lamp off otherwise.
- RS-232. A serial connection to a controller or computer; confirm with Incure which commands and data the head supports before designing recipe management around it.
- Foot switch. Manual triggering for operator-paced work, such as setup, sampling, or low-volume runs on the same conveyor.
The timer and continuous modes determine what a trigger does. Continuous mode suits a steady stream of parts; timer mode suits discrete exposures where the head should run for a set period per signal.
Email Us with your line’s control architecture, and Incure can confirm how a CDM™ LED head connects to it.
Interlocks Worth Designing In
The value of a PLC connection is in the conditions it enforces. Common interlocks for a conveyor cure station include:
- Part-present gating. Lamp output tied to a sensor upstream, so the head is not running against an empty belt.
- Belt-motion permissive. No exposure unless the belt is moving, to avoid over-curing a stationary part under a high-intensity head. This matters more as intensity rises; the M51 focused-beam head reaches 6,150 mW/cm² at 365 nm.
- Upstream fault stop. If the dispenser before the conveyor faults, the line controller holds the cure station rather than passing uncured or partly dispensed parts.
- Guard and access interlocks. Exposure disabled while access panels or loading points are open, as part of the facility’s UV safety plan.
- Downstream full. If the next station cannot accept parts, stop loading rather than letting cured parts pile up.
Which of these apply depends on the line, and each should be reviewed as part of the facility’s machine-safety assessment rather than copied from a template.
Recipe and Traceability
Belt speed sets dose on a conveyor; CDM™ speed adjusts from 1.5 to 12.0 ft/min. Storing each product’s speed, mode, and head settings in the line controller makes changeovers repeatable and gives a record of how each lot was cured. A cure-cycle log tied to lot numbers lets quality staff confirm, after the fact, that the settings in use matched the qualified recipe.
Logging the settings is not the same as measuring dose. LED output decays over life — Incure rates its LED heads past 20,000 hours with up to 20% decay — so scheduled radiometer checks still belong in the procedure, with results recorded alongside the controller log.
Integrating an Arc Head Station
When an arc head is the right choice for the chemistry, the station can still sit in an automated line. Practical approaches:
- Control belt speed and loading from the line side, with the arc lamp left running during production.
- Put guard and access interlocks on the enclosure and loading points rather than on the lamp itself.
- Account for warm-up and cool-down time in the line’s start-up and shutdown sequence, since mercury-arc lamps need both.
- Record speed settings manually per lot if the controller cannot read them from the station.
Placement in the Line
A conveyor positioned downstream of a robotic cell lets cure time follow robot cycle time instead of creating a queue at a standalone station. To make that work, the conveyor’s dose at the chosen speed must suit the cycle time the robot sets; calculate that before wiring anything. The industrial guide to curing conveyors covers where conveyors fit in a line, and the CDM™ lamp-head guide lists which configurations carry the PLC interface. For lines also running standalone LED flood lamps, the Incure L-Series™ flood lamp guide covers the same LED technology outside the conveyor.
Commissioning the Control Link
Before production, test each interlock deliberately: block the part sensor, stop the belt, open a guard, and fault the upstream station, confirming the expected response each time. Record the results with the commissioning file.
Contact Our Team to plan PLC integration for a CDM™ conveyor in your line.
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