TECHNICAL SUPPORT
Published 2026-03-14
Have you also encountered this problem when choosing a steering gear when doing product innovation? The parameters look good, but something goes wrong when I install it.
Many friends who have just started to get involved in the field ofservoapplications, especially those who are engaged in robotics or intelligent hardware innovation, often tell me their troubles: they obviously choose theservoaccording to the manual, but after installation, it turns out to be in various conditions, such as insufficient torque, constant shaking, or even direct burnout. This is actually not because you don’t know how to choose, but the seemingly simple component ofthe 1210servohas many details hidden behind it.
As an engineer who has been in the industry for many years, I have noticed that many people make mistakes at the beginning - focusing only on torque, but ignoring the crucial factor of system matching.
Torque is important, of course, but it's not the only thing. Forthe 1210 servo, you must first understand three core indicators: torque, speed and accuracy. Just like when buying a car, you can't just look at the horsepower, but also the acceleration and handling.
I suggest you make a simple matching table: first calculate how much torque your mechanism requires, and then multiply it by a safety factor of 1.5 times; then see if the rotational speed can meet the action requirements; and finally confirm that the angle error is within the allowable range. Many novices just look at the torque. As a result, the speed cannot keep up, and the entire system responds half a beat slower.
This may be the most confusing choice. To put it simply, analog servos are cheap but have average control accuracy, like an ordinary driver; digital servos are more expensive, but have fast response and accurate positioning, like an experienced driver.
How to choose? It depends on the type of product you are working on. If you are making simple model cars or boats, analog servos can fully meet your needs; but if it involves making humanoid robots or robotic arms, I suggest you make the effort to choose digital servos. The processor inside the digital servo can send correction signals hundreds of times per second, making the movements extremely smooth without the embarrassing "beat-by-beat" situation.
This problem is so common that a man who makes robots came to me to complain to me two days ago. In fact, insufficient torque does not necessarily mean that you bought a small one. Sometimes it is a problem of power supply and drive.
First, carefully check the voltage, becausethe 1210 servocan only fully exert its maximum torque at the rated voltage. Once the voltage drops by 10%, the torque is likely to drop by more than 20%.
Secondly, you need to check whether the driving current is sufficient. When many people use ordinary power supplies to drive multiple servos, once they are started, the voltage will be pulled down. The last thing to consider is replacing a high-torque model. Remember this formula: adjust the parameters first, and then replace the hardware. This can save costs and simplify operations.
The shudder is just as annoying as the shudder in a car. When this happens, 80% of the time it is because the control signal is unstable or the mechanical structure has resonance.
You can troubleshoot step by step: first test the servo alone. If it does not shake, it means the problem is in the control system; if it still shakes, check whether the power supply ripple is too large. In many cases, adding a large capacitor to the power supply can solve the problem. If it is caused by mechanical resonance, slightly changing the installation method or adding a shock absorber will have an immediate effect.
The brands on the market are truly dazzling. Domestic products such as Huisheng and Yinyan are affordable, stable in performance, and suitable for mass production; imported products such as Hitec have high precision and long life, and are suitable for high-end models.
My suggestion is don’t blindly pursue imports, and don’t buy cheaper brands. You can first buy several mainstream brands for comparison testing to see which one performs best in your application scenario. Remember to ask the supplier if they have samples. Most regular manufacturers are willing to provide testing opportunities.
️ Specific steps:
1. Make a list of your performance needs
2. Screen 2-3 intended brands
3. Apply for sample testing
4. Compare data to make decisions
If the servo is broken, don't throw it away in a hurry. Many minor problems can be repaired by yourself. The most common faults are gear sweeping or motor jamming, which can often be revived by replacing accessories.
But special attention should be paid: when disassembling, be sure to remember the order of the gears, and taking a photo is the safest way; motors and potentiometers are relatively delicate, and must not be operated with brute force; when welding circuit boards, do not set the temperature too high, otherwise the components will be easily burned. If you are not familiar with electronic maintenance, it is recommended to only replace mechanical parts such as gears, and for circuit problems, it is better to go to professional maintenance personnel to avoid repairs that get worse.
Having said so much, I wonder what is the most troublesome servo problem you have encountered in the products you are currently making? Are you clueless and unable to find the direction when selecting a model, or are you constantly experiencing problems during the debugging process? Welcome to share your experience in the comment area, and let's discuss solutions together. If you find this article useful, don’t forget to like and forward it so that more friends who are engaged in product-related work can avoid detours.
If you have any other confusions or opinions about servos, you can feel free to express them in the comment area. By communicating with each other and making progress together, we may be able to find more effective solutions and make the product work more smoothly. Thank you again for reading, and I look forward to seeing your sharing. We hope that we can work together to contribute to product optimization.
Update Time：2026-03-14
Contact Kpower's product specialist to recommend suitable motor or gearbox for your product.
