HP-730 Selective Conformal Coating Machine | Precision PCB Conformal Coating System
The HP-730 Selective Conformal Coating Machine is an automated PCB coating system designed for high-precision selective application of conformal coating materials on complex electronic assemblies.
Using a high-speed 3-axis servo motion platform, the HP-730 accurately controls the coating path around connectors, components, keep-out areas, and other non-coated regions. It supports point coating, line spraying, curved-path spraying, and dispensing, making it suitable for high-density PCB assemblies with complex coating requirements.
With precise motion control, programmable coating paths, automatic cleaning, UV inspection lighting, and SMT-standard SMEMA connectivity, the HP-730 provides a practical solution for manufacturers seeking consistent and repeatable selective conformal coating automation.
Precision Selective Coating for Complex PCBs
Modern PCBs often contain connectors, test points, switches, heat-sensitive components, and other areas that must remain free from conformal coating. Manual spraying can result in inconsistent coating thickness, overspray, masking requirements, and operator-dependent quality.
The HP-730 uses programmable X/Y/Z motion to accurately follow the required coating path while avoiding designated keep-out areas. The system can perform:
- Selective conformal coating
- Point coating
- Line coating
- Curved-path spraying
- Localized dispensing
- Complex multi-track coating
This allows manufacturers to coat only the required areas without applying material to sensitive components or connectors.
High-Speed 3-Axis Servo Motion
The HP-730 combines servo motors with precision screw-driven linear modules for stable and repeatable movement.
| Motion Parameter |
Specification |
| X/Y Maximum Speed |
800 mm/s |
| Z Maximum Speed |
300 mm/s |
| XYZ Repeat Accuracy |
±0.02 mm |
| PCB Transport Speed |
0.5-3.5 m/min |
| PCB Width |
50-450 mm adjustable |
| Component Height |
Max. 110 mm |
The ± 0.02 mm repeat positioning accuracy helps maintain consistent coating paths across repeated production cycles. High-speed X/Y movement also helps reduce unnecessary travel time during complex coating programs.
Dual-Valve Configuration for Flexible Coating Processes
The standard HP-730 is equipped with:
- 1 * H-905 precision atomizing spray valve
- 1 * H-D01 needle-type dispensing valve
This dual-valve configuration enables both spraying and localized dispensing within one production platform. The spray valve can be used for larger coating areas, while the dispensing valve can handle localized coating or adhesive application. This combination allows one machine to support different process requirements without requiring separate equipment.
Reduce Overspray and Coating Shadow Effects
Complex PCB assemblies can create difficult areas around component edges, where conventional spraying may produce uneven coverage or coating shadow effects. The HP-730's programmable motion and selective coating paths help control the material application around component edges and confined areas.
The result is more uniform coating coverage while minimizing unwanted material deposition in keep-out zones. This is especially valuable for high-density PCBs and complex electronic assemblies where coating quality directly affects product reliability.
Flexible Programming for Different PCB Designs
The HP-730 provides multiple programming methods to simplify production setup and product changeover. Operators can create coating programs through:
Teach Pendant + Mouse/Keyboard Programming
The software also supports automatic programming through data input, helping manufacturers reduce manual programming workload when processing different PCB models. Programming supports different trajectory types, including:
- Points
- Straight lines
- Curves
- Multiple coating paths
- Selective areas
- Complex PCB geometries
The same platform can therefore accommodate both relatively simple boards and high-density complex PCBs.
Automatic PCB Transport and SMT Line Integration
The HP-730 is designed for integration into automated SMT and PCBA production environments. The conveyor system features:
- Stainless steel chain conveyor
- Dual independently controlled stepper motors
- Motorized rail-width adjustment
- Adjustable PCB transport width from 50-450 mm
- PCB transfer height of 910 ± 20 mm
An SMEMA interface is provided for communication with other SMT production equipment, allowing the coating machine to be integrated into an automated PCB production line.
Built-In Cleaning and UV Inspection Functions
Consistent coating quality depends not only on accurate dispensing but also on proper equipment maintenance and process inspection. The HP-730 includes a built-in cleaning function to help maintain the coating valves and material delivery system.
A built-in UV inspection light source allows operators to inspect UV-fluorescent conformal coating coverage after application. Integrated illumination also improves visibility during operation, programming, and process inspection.
Conformal Coating Materials
The HP-730 can be configured for different electronic coating processes, including commonly used:
- Acrylic conformal coatings
- Polyurethane conformal coatings
- UV-curable coatings
- Other application-specific protective coatings
Material and valve configuration can be selected according to coating viscosity, coverage requirements, curing characteristics, and PCB design.
Typical Applications
The HP-730 is suitable for selective conformal coating applications in:
- Automotive Electronics
- BMS & Battery Electronics
- Industrial Control
- Power Electronics
- Communications Electronics
- Smart Home Appliances
- Metering Equipment
- Photovoltaic Inverters
- EMS / PCBA Manufacturing
Typical products include automotive control boards, BMS boards, industrial controllers, power control PCBs, communication modules, and other high-density electronic assemblies.
Technical Specifications
| Parameter |
Specification |
| Model |
HP-730 |
| Machine Dimensions |
L1060 * W1200 * H1650 mm |
| Control System |
Industrial PC + Motion Control Card |
| Programming |
Teach Pendant + Mouse/Keyboard |
| PCB Transfer Height |
910 ± 20 mm |
| PCB Transport Speed |
0.5-3.5 m/min |
| Conveyor Type |
Stainless Steel Chain Conveyor |
| PCB Width |
50-450 mm Adjustable |
| Component Height |
Max. 110 mm |
| X/Y Speed |
800 mm/s |
| Z Speed |
300 mm/s |
| XYZ Repeat Accuracy |
±0.02 mm |
| Standard Valves |
H-905 Spray Valve + H-D01 Dispensing Valve |
| Material Tank |
10 L Stainless Steel Pressure Tank |
| Cleaning Tank |
2 L Stainless Steel Pressure Tank |
| Cleaning |
Integrated Cleaning Function |
| UV Inspection |
Built-In UV Light Source |
| Power Supply |
AC 220V, 50Hz |
| Air Supply |
4-6 kgf/cm² |
| Total Power |
1.8 kW |
| Machine Weight |
Approx. 500 kg |
| SMT Interface |
SMEMA |
Why Choose HP-730?
Selective Coating Precision
Programmable 3-axis motion enables accurate coating around connectors and keep-out areas.
± 0.02 mm Repeat Accuracy
Stable positioning helps maintain consistent coating paths during repeated production.
Dual-Valve Process Capability
Spraying and dispensing can be performed on the same platform.
High-Speed Motion
X/Y speeds up to 800 mm/s support efficient processing of complex PCB coating paths.
Flexible PCB Handling
Motorized conveyor width adjustment accommodates PCB widths from 50 to 450 mm.
SMT Line Ready
SMEMA communication enables straightforward integration with automated PCBA production lines.
Integrated Process Support
Cleaning, illumination, and UV inspection functions simplify daily operation and coating verification.
Optimize Your PCB Conformal Coating Process
If your PCB requires selective conformal coating around connectors, components, and other keep-out areas, the HP-730 provides a flexible automated platform for improving coating consistency and production efficiency.
Haipai can also evaluate your PCB design, coating material, coating areas, and process requirements to recommend the appropriate valve configuration and coating solution.
Contact Haipai for PCB coating samples, process testing, and equipment configuration.
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