monolithic microservices architecture

When the servo motor meets the "monolithic" microservice architecture: Why is simplicity more reliable?

Have you ever had such an experience? ——A seemingly well-designed automation system always stumbles when it runs. Once a certain link changes, the entire production line has to stop and adjust. The more you write the program, the more complex it becomes, and maintaining it feels like unraveling a mess. It feels like using a precision steering gear to execute a set of contradictory instructions. The result can only be heat, jitter, or even failure.

In the world of industrial automation, we often fall into a strange circle: in order to cope with complex tasks, we constantly add modules, split services, and introduce middleware. As a result, the system itself becomes the biggest burden. This reminds me of some early mechanical designs, where countless structures were superimposed for one function, and even I couldn't figure it out.

What's the problem? Many times, it is not how difficult the task itself is, but the way we solve the problem is too "discrete". Information is passed back and forth between different services, like a never-ending relay race. If any one is slow or lost, the entire process will be stuck. For servo motor control that relies on real-time response and precise coordination of mechanical movements, this delay and instability is fatal.

As a result, a seemingly "retro" but extremely effective idea returns to the center of the stage: Monolithic Microservices Architecture. Don't let the name fool you, it's not a throwback to the monolithic, clunky system of the past. Rather, it is a subtle reintegration.

What exactly is it? To put it simply, it means "when it comes to harmony, it will come together"

Imagine you are designing a robotic arm. The rotation of the wrist, the opening and closing of the claws, and the expansion and contraction of the arm are all driven by independent servo motors. The traditional microservice architecture may set up an independent service unit for each motor, each sensor, and each control logic. They call each other via network API.

The overall microservice architecture will think about: should these closely coordinated actions that require millisecond-level synchronization live in the same "room"? It encapsulates functional modules that require high-frequency, real-time, and strong consistency collaboration into an intrinsically tightly coupled "overall unit." This unit still maintains a clear and standard interface to the outside world, but internal communication takes the "high-speed internal line" and no longer needs to go through slow and unreliable network rounds.

This is like integrating several key servos that control the precise movements of a robotic claw into a single integrated drive module. The internal signals are directly connected and the response speed is extremely fast; externally, it is still just a standard "paw control" interface.

What difference will this make?

• The response is fast and the certainty is high.The most direct feeling is that the system is more "following". The time originally spent on network communication and serialization/deserialization is greatly compressed. For multiple servo motor linkage operations that pursue ultimate synchronization, this efficient internal communication means more precise trajectory control and less cumulative error. Reliability is no longer overly dependent on network conditions.
• Operation and maintenance are simplified and I feel more at ease.There are fewer objects to deploy, monitor, and debug. You no longer need to manage dozens or hundreds of scattered service instances, but focus on a few fully functional "overall units". When something goes wrong, the scope of investigation becomes more focused. It's like going from managing a complex model made up of countless parts to maintaining several core functional modules.
• The boundaries are clear and development is smooth.It forces you to think carefully at the beginning of the design: Which functions are naturally meant to go together? This creates module boundaries that are more in line with the nature of the business rather than technical convenience. Development teams can work around a complete, cohesive functional unit, reducing cross-team coordination losses.

Some people may ask: "Isn't this a step back?" This is not the case. The monolithic architecture of the past was a "chaotic mess", while monolithic microservices were a "thoughtful integration." It absorbs the advantages of clear boundaries of microservices and avoids the delay and complexity problems caused by excessive distribution. The core lies in: determining the coupling degree of technology based on the natural coupling degree of business.

How to decide where to use it?

Not suitable everywhere. Think about your system:

• Are there several services with extremely high frequency of calls and huge amounts of data exchange?
• Do they have to maintain strong data consistency, as if they are an indivisible whole?
• Are their failures and successes always bound together, with one prospering and the other suffering?

If your answer is yes, then these parts are excellent candidates for "monolithic" architecture. Typical scenarios include: high real-time motion control coordination (such as multi-servo motor synchronization), fast-response sensor data processing and decision-making loops, and tightly coupled business processes that require transaction guarantees.

This is like building a solid "core cabin" for your automation system. Inside the cabin is a highly integrated critical life support system with efficient collaboration; outside the cabin, it is flexibly connected to other functional cabins (such as material management, order processing and other traditional microservices) through standard interfaces.

existkpower, we firmly believe that technology should serve results, not frameworks that constrain hands and feet. We’ve seen too many projects lose their essence in over-architecture. , when it comes to precision motion control, mechanical coordination and reliable automation, we tend to embrace this pragmatic and efficient "holistic" design philosophy. It's not that "fashionable", but it's extremely "reliable". It allows the system's attention to return to what it should be focused on - completing every physical action accurately, stably, and in a timely manner.

After all, the best architecture often allows complexity to disappear inside and present simplicity to the outside world. When you no longer worry about endless communications within the system, you can focus more on making the next mechanical move flawless.

Established in 2005,kpowerhas been dedicated to a professional compact motion unit manufacturer, headquartered in Dongguan, Guangdong Province, China. Leveraging innovations in modular drive technology,kpowerintegrates high-performance motors, precision reducers, and multi-protocol control systems to provide efficient and customized smart drive system solutions. Kpower has delivered professional drive system solutions to over 500 enterprise clients globally with products covering various fields such as Smart Home Systems, Automatic Electronics, Robotics, Precision Agriculture, Drones, and Industrial Automation.