Many UV curing purchases that disappoint were specified from a lamp datasheet instead of from the process. A requirements worksheet reverses the order: define what the cure must achieve first, then let those numbers select the equipment.
Q: What Do You Need to Specify a Custom UV Curing System?
A: Seven Inputs: Chemistry, Dose, Geometry, Throughput, Cooling, Controls, and Safety
Each input constrains the next, so fill them in order. If you need an overview of the equipment families before filling the worksheet, see Incure’s benchtop UV curing systems guide.
1. Chemistry and Wavelength
Record the adhesive, coating, or ink, its photoinitiator’s absorption band, and its cure depth. LED lamps emit one narrow band per unit, such as 365, 385, 395, or 405 nm on the L-Series™, and the band cannot be changed after delivery. Broadband mercury arc, such as the S20™ at 275–650 nm, tolerates several chemistries. Pigmented or thick layers generally favor longer wavelengths for depth.
2. Required Dose and Irradiance
The material’s technical data should state a minimum dose (mJ/cm²) or a cure time at a known intensity (mW/cm²). Dose equals irradiance times exposure time, so a given dose can come from high intensity for a short time or lower intensity for longer. Note both the minimum and the maximum, because some materials degrade or yellow when overexposed.
3. Part Geometry and Cure Area
Write down the cure zone’s length, width, and depth, plus any shadowed regions. Spot systems suit small points; flood systems suit areas. Intensity trades against area: Incure’s L-Series™ flood lamps fall from 4,300 mW/cm² on the 1″×1″ L11 to 950 mW/cm² on the 14″×14″ L1414. Also record working distance, since irradiance falls steeply as the part moves away.
4. Throughput and Format
Define parts per hour and the takt time. Low volume suits a bench chamber; continuous flow suits a conveyor such as the CDM™, where belt speed sets dose between 1.5 and 12.0 ft/min. Include any warm-up the line cannot tolerate, since mercury-arc lamps need 1–2 minutes and LEDs do not.
Email Us with your completed worksheet, and Incure’s team can review it against available lamp and chamber configurations.
5. Cooling and Utilities
Air-cooled lamps need clear airflow only. Water-cooled models such as the W44 and W1212 reach higher intensity (8,100 mW/cm² on the W44 against 3,100 for the air-cooled L44) but need inlet and outlet plumbing. List available voltage as well: several Incure lines accept 100–240V, while the S20™ is ordered for either 100–120 VAC or 200–240 VAC.
6. Controls and Integration
State whether the system is operated by foot switch, driven by a PLC, or controlled over RS-232, and whether timer or continuous exposure is needed. Record the number of independent exposure channels, since one L9000™ controller can drive up to four lightguides.
7. Safety and Enclosure
Decide between open operation with shields and eyewear, or an enclosure with an interlock. B-Series™ chambers use an auto-shutter on door opening; C-Series™ chambers cut lamp power when the drawer opens. List required PPE and the rooms where scattered UV could reach unprotected people.
Turning the Worksheet into a Specification
Convert each answer into a pass/fail line: wavelength, minimum irradiance at working distance, uniformity across the cure area, interface type, and interlock behavior. Add maintenance items such as rated lamp life, for example 15,000 to 20,000 hours for Incure LED sources against 1,000 to 2,000 hours for mercury-arc bulbs. A supplier can then quote against measurable requirements instead of a product name.
Common Worksheet Gaps
Three omissions cause much of the re-specification. First, a missing working-distance tolerance: a fixture that allows a few millimeters of variation can change delivered irradiance substantially, especially on focused spot sources. Second, an unstated future need: if the process may move from bench to line, ask whether the lamp, chamber, and control interface can follow, as with a shared PLC and RS-232 architecture across lamp and conveyor. Third, no acceptance method: write down how irradiance will be measured at delivery, so the specification can be verified rather than argued.
Reviewing the Worksheet with a Supplier
Bring the completed sheet to the first supplier conversation rather than the last. Ask which inputs the proposed configuration meets directly and which it meets only by assumption, such as intensity quoted at a different distance than your process uses. Request irradiance data at your working distance and wavelength, and confirm in writing which accessories, such as lightguides, chambers, or shields, are included in the quoted configuration.
Final Thoughts
A custom UV curing system is defined by seven inputs, not by a lamp model. Complete the worksheet, convert it into acceptance lines, and verify delivered irradiance at the working distance before sign-off. Contact Our Team to discuss a specification for your process.
Visit www.incurelab.com for more information.