4-Axes Selective Coating Machine(HTF-450C)

Introduction

• Control System:
Equipped with an industrial computer and motion control card, operated via a 21-inch monitor with mouse and keyboard. Programming is simple and user-friendly. The software is independently developed for easy maintenance. When creating programs, operators can select different spray valves according to required coating width and adjust Z-axis height based on component height on the PCB. All programs can be stored and recalled for different PCB models. The system can automatically immerse the glue gun when no workpiece is present, preventing adhesive drying and clogging.

• Machine Frame:
The base frame is welded from reinforced 60×60 mm square tubes with stress-relieved treatment, delivering excellent rigidity, hardness, and minimal thermal deformation. The working platform is precision-milled with a gantry milling machine to ensure the motion system operates on a stable and accurate platform. Other areas are covered with stainless steel to prevent conformal coating corrosion.The surfaces are finished with electrostatic powder coating for a refined appearance.

• Working Section:
The X/Y/Z/U four-axis motion platform consists of linear guides, ball screws, and servo motors. All four axes adopt a self-developed sealed linear module to prevent atomized coating material from attaching to the screw or guide. This ensures stable and high-precision motion control. Each dispensing valve is independently controlled for high stability and accuracy. The system uses dispensing valves and high-precision atomizing spray valves with adjustable spray width. A fine-tuning pressure regulator ensures consistent adhesive output and clean, well-defined edges.

• Conveying System:
Driven by a stepper motor, with protective strips added to the guide rails to maintain power even if high-viscosity adhesive sticks to the chain. The self-developed aluminum conveyor structure is both aesthetic and practical. It uses chain-driven conveying with top-side protective strips to prevent coating from dripping onto the chain. Conveyor width is automatically adjusted via stepper-motor drive for high accuracy, with a adjustment range of 50–450 mm. The chain uses a 35B stainless-steel chain with extended pins and baffle plates.

• PCB Clamping System:
Upon PCB entry, sensors trigger automatic stop, clamping, and top-holding to keep the PCB firmly fixed, preventing shifting during coating and ensuring accurate positioning.

• Glue Supply System:
A mobile glue-supply cart consisting of a 10 L pressure tank and a 2 L stainless-steel cleaning tank. The cart has casters for easy movement. The pressure tank includes an air regulator, safety valve, vent valve, outlet, and inner chamber.

• Exhaust System:
A high-power top-mounted exhaust fan ensures strong, durable, and quiet extraction, removing atomized coating mist from the workspace (this is optional function,standard models do not include this system).

• Soaking System:
A custom-designed stainless-steel container provides convenient glue-gun soaking and easy replacement.

• Lighting & Inspection:
Equipped with an LED lighting system and an LED UV inspection light. A selector switch allows toggling between modes. The UV light is used to inspect conformal-coating coverage on PCBs.

• Cleaning Function:
The machine offers an automatic cleaning mode. After stopping the machine, switching to cleaning mode allows cleaning liquid from the pressure tank to flush through the spray valve automatically—No need for manual disassembly.

Feature Summary

• 1. Industrial PC + motion control card, Windows operating system, audible/visual alarm, and menu display
• 2. Manual teaching programming for quick and simple operation
• 3. Servo motor + ball-screw drive
• 4. Four-axis motion (X, Y, Z, U), dual-direction ±180° rotation, maximum valve tilt angle of 35°
• 5. Positioning accuracy of 0.02 mm with automatic error compensation
• 6. Specialized aluminum alloy rails and stainless-steel conveyor chain (single-section guide rail)
• 7. Integrated steel motion platform ensuring stable operation
• 8. Automatic valve-cleaning system
• 9. SMEMA or IPC Hermes 9852 interface compatible with upstream and downstream equipment