LOCTITE CL40

Overview

LOCTITE CL40 is a modular LED spot-curing platform built around the EQ CL40 Quad LED Controller and matching LED Spot Heads. The controller drives up to four independent LED heads at 365 or 405 nm, providing high intensity curing in small, precisely defined areas.

Compared with traditional mercury arc lamps, CL40 delivers:

• Instant full output – no warm-up or cool-down time

• Greatly extended LED lifetime and low power consumption

• A compact footprint that’s easy to integrate into cells, fixtures or conveyors

Why production engineers choose LOCTITE CL40

1) True multi-channel control
Drive up to four LED heads from one controller, with each channel programmable for its own intensity and exposure profile. This lets you tune cure energy for different parts or zones on the same workstation.

2) Flexible cure modes
The CL40 offers Timer, Continuous and Advance / multi-step modes, with up to seven steps per program. You can ramp power, pulse, or combine short bursts for heat-sensitive components while still achieving full cure.
Matched LED heads and optional lenses (3, 6 or 10 mm) concentrate light for very high irradiance on a small footprint, ideal for dots and narrow bond lines.

4) Designed for LOCTITE UV/visible adhesives
The CL40 family is engineered around LOCTITE’s UV and visible-light-curing adhesives, giving predictable cure performance and simpler process validation.

5) Easy integration and low cost of ownership
24 VDC operation, a compact housing and touchscreen interface make the controller straightforward to mount and control via PLC, footswitch or front-panel trigger. Long-life LEDs and low input power help keep running costs down.

Typical Applications

• Electronics assembly: bonding and encapsulating sensors, connectors, flex circuits and PCBs

• Medical devices: spot-curing catheters, housings and micro-fluidic components (where LED wavelengths match approved adhesives)

• Optics & photonics: lenses, filters, fiber components and light guides

• Precision mechanics: small housings, plastic/metal sub-assemblies and micro-bonding in jigs and fixtures

Any process that needs fast, repeatable, small-area curing of LOCTITE light-cure adhesives can benefit from the CL40 system.

Key Technical Data

Controller – LOCTITE EQ CL40 Quad LED Controller

• Spectral wavelength: 365 or 405 nm (selectable via LED head)

• Channels: up to 4 LED spot heads

• Run modes: Timer, Continuous, Advance / multi-step

• Programming: up to 7 steps per channel (intensity and exposure time)

• Operating voltage: 24 V DC, power consumption < 35 W

• Dimensions (approx.): 99 × 162 × 126 mm, weight ≈ 2 kg

• Included: controller, AC power supply, footswitch, manual

LED Spot Heads & Lenses

• Wavelength options: 365 nm or 405 nm

• High-intensity LED design with instant on/off

• Standard 6 mm lens included; optional 3 / 6 / 10 mm lenses to adjust cure area

How the CL40 System Is Used

1. Configure the system

   • Mount the EQ CL40 controller near the workstation or cell.

   • Connect up to four CL40 LED Spot Heads using the supplied cables and fit the appropriate lenses.

2. Set cure parameters

   • Use the touchscreen to select wavelength (via head choice), run mode and program steps.

   • For each channel, define intensity and exposure time according to adhesive and part geometry.

3. Integrate with your process

   • Trigger curing via front-panel start/stop, the foot switch, or a PLC I/O signal.

   • Position parts under the LED spot (manually or with an automated motion system) and start the cycle.

4. Monitor and protect LED heads

   • Built-in temperature feedback shuts down the output if a head overheats, protecting the LED array and ensuring consistent irradiance.

5. Optimize and standardize

   • Once cure parameters are validated, store them as programs for repeatable use across shifts and production lines.

Safety & Handling

The CL40 system produces high-intensity UV/visible light. To protect operators and comply with safety standards:

• Shield or enclose the cure area where possible to avoid stray UV light.

• Keep the light path below eye level and use barriers to prevent access while curing.

• Wear appropriate UV-blocking safety glasses and protective clothing.

• Inspect the power cord and housing regularly and do not operate a damaged unit.

• Only qualified personnel should service the controller, following Henkel’s manual and local regulations.

Always consult the current Operating Manual and Safety Data for detailed instructions.

FAQs

Q1: What adhesives can I cure with the LOCTITE CL40 system?
The CL40 is designed for LOCTITE UV and visible-light-curing adhesives whose peak sensitivity matches the 365 nm or 405 nm LED heads. Check the Product Data Sheet (PDS) of your adhesive and select the wavelength that best matches its cure curve.

Q2: How do I choose between 365 nm and 405 nm LED heads?
Use 365 nm when you need deeper cure in more opaque or highly filled materials, or when the adhesive is optimized for UV only. Use 405 nm when you want better cure through some plastics or glass that transmit visible light more efficiently, or when the adhesive is dual UV/visible curing.

Q3: Can I run different cure programs on each channel?
Yes. Each of the four channels on the EQ CL40 Quad Controller can be programmed with its own intensity and time profile. That means you can use different LED heads, cure times or power levels on different stations or zones from the same controller.

Q4: How do I set up multi-step curing for heat-sensitive parts?
Use the Advance / multi-step mode and create a program with up to seven steps. For example, you can start with a low-intensity “tack” step to position components, then follow with one or more higher-intensity steps to reach full cure while minimizing peak temperature.

Q5: What spot size can I achieve with the CL40 LED heads?
Standard heads can be equipped with lenses of approximately 3, 6 or 10 mm diameter. Choose a smaller lens for very localized bonds or micro-components, and a larger lens for broader coverage or when tolerances on part positioning are less precise.

Q6: Is the CL40 suitable for automated production lines?
Yes. The controller can be triggered via PLC I/O, as well as by footswitch or front-panel buttons. This makes it easy to integrate into semi-automatic fixtures, rotary indexing tables or fully automated conveyor systems.

Q7: How long do the LED heads typically last?
LED heads generally offer significantly longer service life than traditional mercury lamps, especially when operated within the recommended duty cycle and temperature limits. The built-in temperature monitoring in the CL40 protects the LEDs by shutting down output if an over-temperature condition is detected.

Q8: What safety precautions are required when using the CL40?
The CL40 emits high-intensity UV/visible light. Always shield the cure area, wear UV-blocking safety glasses, and prevent direct eye or skin exposure to the beam. Make sure operators are trained on UV safety and follow your facility’s EHS procedures.