How Industrial Spray Robots Work: Control System, Spray Process & Trajectory Planning

Discover how industrial robot controllers power complete automation solutions. Learn system integration strategies for smart manufacturing with SZGH. Industrial spray robot，Automatic spraying，Robotic coating，Spray robot control system

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Product Description

How Industrial Spray Robots Work: Control System, Spray Process & Trajectory Planning

In modern manufacturing, surface coating is no longer just about appearance. It directly impacts product durability, corrosion resistance, and market value. Traditional manual spraying often gives uneven coating, wastes materials, and poses serious health risks to workers.

Building on these requirements in today’s industries, the industrial spray robot has become a key solution for achieving high-efficiency, high-quality automatic spraying across industries such as furniture, automotive parts, and metal fabrication.

To further clarify how these systems achieve such capability, this article explains how industrial spray robots work, focusing on the spray robot control system, coating process, and trajectory planning, using the SZGH-P1600-10C as a practical example.

1. The Basic Working Principle of Industrial Spray Robots

An industrial spray robot is a precision-automated machine comprising mechanical structures, electronic controls, air-driven systems, and components that perform spraying. Its main function is to guide the spray gun along a pre-determined path at a steady speed and angle. At the same time, it carefully controls the flow of paint and the pressure used to break the paint into fine particles (atomization), ensuring an even coating on items with complex shapes. Unlike robots used for handling or welding, spray robots must move very smoothly—any shaking, speed changes, or angle changes can cause issues such as drips, missed spots, too much paint, or uneven color.

The SZGH-P1600-10C is a 6-axis articulated spray robot designed for coating small and medium-sized items. It has a lightweight movable arm, a structure built to limit spark risk (explosion-proof), and can repeat tasks with high accuracy. Typical uses include chair frames, metal furniture, automotive parts, and other surface-coating applications. Its operation is based on a closed-loop system: the control unit sends instructions, the motors move each joint, and the spray control adjusts the output to keep all parts working together in real time for stable spraying.

2. Technical Parameters of SZGH-P1600 Industrial Spray Robot

Item	Specification
Robot Model	SZGH-P1600-10C
Number of Axes	6 axes
Maximum Reach	1600mm
Rated Payload	10kg
Repeat Positioning Accuracy	±0.05mm
Structure	Articulated arm
Installation	Ground mounted
Spray Compatible Process	HVLP, electrostatic spray, air spray
Control System	Dedicated spray control system
Programming Mode	Teach pendant + offline programming
Protection Grade	IP65 body, explosion-proof for painting booth
Applicable Workpiece	Metal furniture, chair frames, auto parts, hardware
Power Supply	AC 220V, 50/60Hz

3. Control System: The Core Brain of SZGH-P1600-10C

The control system is like the robot's brain and determines how well the spray robot works. The SZGH-P1600-10C uses a control system specifically designed for spraying applications, combining movement control, paint flow adjustment, safety features, and an easy-to-use interface.

3.1 Motion Control Module

The control system can accurately move the robot and supports straight-line, arc, and smooth-curve movements. This means it can maintain a steady spray speed while quickly changing positions. Its commands update quickly enough to prevent delays or vibration, both of which are important for an even paint layer.

3.2 Spray Parameter Control Module

This part of the system manages how much paint is released, the air pressure used to break up (atomize) paint, the width of the spray pattern, when the spray trigger is pulled, and cleaning the spray gun. Operators can set and save different process settings using the manual control panel (teach pendant). When changing products, they only need to pick the correct settings, which greatly shortens setup time.

3.3 Safety and Explosion-proof Design

Because spraying involves flammable (easily ignited) paint mist, the SZGH-P1600-10C has a fully sealed body and control box, built to prevent sparks (explosion-proof). It also features emergency stop buttons, collision-avoidance sensors, gas detectors, and door safety locks, meeting the safety requirements of spray booths.

3.4 Human-Machine Interaction

The system provides an easy-to-use interface available in multiple languages. It lets operators program tasks in advance or teach the robot by guiding it directly, making it easier for workers with different skills to operate.

4. Complete Automatic Spray Process of SZGH-P1600-10C

A complete industrial spray robot follows a standard, repeatable coating process. The SZGH-P1600-10C uses a four-step procedure: 1) Positioning the workpiece and checking signals,

The workpiece enters the spraying station via a conveyor or positioning fixture. The system receives the in-position signal, confirms the workpiece type, and then calls the matching program.

4.2 Program Startup and Pre-Spray Preparation

The robot moves to its starting position, and the system starts the spray system ahead of time to maintain steady pressure and paint flow. This prevents uneven coating at the very beginning of the spray path.

4.3 Synchronized Execution of Spraying

The robot moves along the planned path while the spray gun applies paint. The control system adjusts the paint flow and speed in real time to maintain a steady coating thickness. For shapes such as curves, vertical surfaces, or internal holes, the SZGH-P1600-10C automatically adjusts its position to cover all areas without leaving any gaps.

4.4 Ending, Cleaning, and Reset

After spraying, the spray gun closes, and the robot moves to a cleaning or waiting position. The system can automatically clean the spray gun and perform maintenance, such as removing paint residue from the nozzle to prevent clogging. The system then prepares for the next item.

This process makes industrial spray robots far more stable than manual operation, especially in mass production.

5. Trajectory Planning: The Key to High-Quality Coating

Trajectory planning determines coating uniformity, paint utilization, and production efficiency. Poor trajectories lead to uneven thickness, excessive overspray, and low productivity. The SZGH-P1600-10C uses advanced algorithms to optimize spray performance.

5.1 Common Trajectory Types

Linear trajectory: for flat panels and simple planes
Arc trajectory: for curved surfaces and rounded parts
Continuous curve path: used for complicated shapes like chair backs and metal frames

5.2 Core Principles of Trajectory Planning

Maintain a fixed distance between the gun and the workpiece.
Keep the overlapping width between adjacent paths stable.
Avoid sharp turns and sudden speed changes.
Minimize empty travel time to improve efficiency.

5.3 Trajectory Teaching on SZGH-P1600-10C

The SZGH-P1600-10C supports both step-by-step (point-by-point) teaching and simulation-based planning of smooth curves. Operators can easily fine-tune path points, speed, and angles through the control panel. The system automatically smooths movement to reduce shaking and achieve a high-quality finish.

6. Advantages of SZGH-P1600-10C Industrial Spray Robot

As a highly practical industrial spray robot, the SZGH-P1600-10C provides clear value for manufacturers:

Stable coating quality with minimal defects
Paint savings up to 20–40% compared to manual spraying
24-hour continuous operation to improve productivity
Explosion-proof structure for safe use in spray booths
Easy programming and fast product switching
Low maintenance cost and long service life

It is widely used in metal furniture, chair frames, automotive parts, lighting, hardware, and other small and medium-sized workpiece coating.

Conclusion

Industrial spray robots achieve stable and efficient coating by integrating motion control, process regulation, and trajectory planning into a coordinated system. The interaction between these elements determines the overall performance and reliability of the coating process.

Systems such as the SZGH-P1600-10C demonstrate how combining mechanical design with control technology can address common challenges in traditional spraying, including inconsistency and material waste. As manufacturing continues to evolve, the role of automated coating solutions will become increasingly important in achieving both quality and efficiency.