Application cases of integrated stepper servo motors in fluid equipment in the spraying industry
Application scenarios
The core equipment of the automotive parts spraying production line needs to accurately control the paint flow, spraying speed and atomization pressure. Traditional motors have problems such as slow response speed and insufficient control accuracy in complex spraying processes. The integrated stepper servo motor is used to optimize fluid pump control and spray valve action, ensure coating uniformity and reduce paint waste.
Selected models and functions
Core model:
•STM4888B-CANopen-M(fluid pump drive)
•STM3250B-CANopen-0FS(spray valve control)
Key functions:
1.CANopen communication protocol: realize multi-axis coordinated control to ensure synchronization of spray path and flow.
2.Speed-torque hybrid mode: dynamically adjust fluid pressure to adapt to different paint viscosities.
3.Block detection and automatic reset: prevent paint blockage from causing equipment jam.
Problems and Challenges
1. Uneven spraying: The flow rate of traditional motors fluctuates greatly during variable speed spraying, resulting in differences in coating thickness.
2. Serious waste of paint: Delayed opening and closing of valves causes excessive spraying of paint, increasing costs.
3. Frequent equipment shutdown: Motor overheating triggers protection mechanisms during high-load operation, affecting production efficiency.
Solutions
1. Accurate flow control:
The STM4888B motor speed is adjusted in real time through the CANopen bus to match the speed changes of the spray path (0.1% speed accuracy).
Enable the speed-torque hybrid mode to dynamically compensate the flow rate according to the viscosity of the paint to ensure stable pressure (±0.05MPa fluctuation range).
2. Valve response optimization:
Configure the position feedforward control for the STM3250B motor to shorten the valve opening and closing time from 120ms to 30ms and reduce paint residue.
Set the soft stop function to avoid mechanical shock when the valve is closed and extend the life of the equipment.
3. Thermal management enhancement:
Optimize the motor PID parameters to reduce the heat generation under high load conditions (temperature rise is reduced by 15℃).
Added intelligent sleep mode, the equipment automatically reduces power consumption when in standby mode to avoid overheating and shutdown.
Application effect
1. Improved coating quality: The consistency of spraying thickness reached 98%, and the yield of customer products increased by 22%.
2. Resource conservation: The utilization rate of coating increased from 75% to 93%, and the annual cost savings exceeded 800,000 yuan.
3. Enhanced equipment stability: The motor-related failure rate decreased by 90%, and the continuous operation time of the production line was extended to 72 hours without maintenance.
Case summary
Through the application of integrated stepper servo motors, the spraying process has been made more precise and efficient. The combination of CANopen communication and intelligent control algorithms solves the pain points of traditional spraying equipment such as large flow fluctuations and delayed response, and significantly improves coating quality and production efficiency. This case provides a reusable technical solution for fluid control in the spraying industry, and fully verifies the technical advantages and reliability of integrated stepper servo motors in complex industrial scenarios.
