TECHNICAL SUPPORT
Published 2026-03-21
When encountering a black screen on the control screen, don’t rush to disassemble the device. In fact, the most common cause of a black screen is a problem with the power supply. You can carefully check the power cord to see if it is loose, or use a multimeter to measure the input voltage to see if it is within the rated range. In many cases, simply replacing a power adapter can solve the problem. ️ There are three simple steps to solve this problem: first, look at the indicator light, second, measure the voltage, and third, change the power supply.
If the power supply is normal but the screen still does not light up, then consider a hardware failure. It may be that the screen cable is in poor contact, or the fuse on the control board is burned out. At this time, you need to open the casing, re-plug and unplug the cable, and check whether there are any burn marks on the circuit board. Be sure to turn off the power before operating, safety first.
The control screen displays normally but theservodoes not move. There is probably a communication problem. You need to first confirm whether the connection line between the control panel and theservois broken, and whether the plug is tightly plugged in. If it is a servo with bus communication, you also need to check whether the address setting is correct. ID conflicts will cause all servos to not respond.
After eliminating the wiring problem, you can try to test each servo individually. The simplest way is to use the PWM signal to directly drive the servo to see whether it can rotate. If the servo can rotate, it means that there is no problem with the servo itself. The fault is most likely in the output end of the control panel or the program configuration. In this case, you need to carefully check the servo parameter settings on the control panel, such as whether the PWM frequency, pulse width range, etc. match each other.
After confirming that there is no problem with the servo itself, the focus is to check the control screen output and program configuration. First check the servo parameter settings on the control screen, such as whether the PWM frequency is set correctly and whether the pulse width range is suitable for the servo. If these parameters are set incorrectly, it may be the source of the problem. Through careful inspection and adjustment of these parameters, it is expected to find the fault location and solve the problem.
During the operation process, novices are most likely to encounter problems in the parameter setting process and stumble. The servo has key parameters such as operating voltage, rotation range, and midpoint position. Once the settings are incorrect, the servo will either not rotate at all, or it will vibrate randomly. You can find the "Parameter Configuration" menu on the control screen, and then check each item one by one against the contents in the servo manual. ️ It is recommended to restore the servo to the factory settings first, and then re-enter the parameters.
In addition, you must be extremely careful when setting parameters. It is necessary to know the specific meaning and function of each parameter and not to operate blindly. Because the normal operation of the servo relies heavily on accurate parameter settings. Only by strictly following the instructions and carefully checking and setting parameters can we ensure that the steering gear works stably and normally and avoid various problems caused by parameter errors. ️ Therefore, the step of re-entering parameters after restoring factory settings is very important and must not be taken lightly.
There is a little trick when changing parameters: first use a servo for debugging. After adjusting the parameters, connect the control panel and observe whether its response is normal. After confirming that it is correct, write the same parameters to other servos in batches. This can avoid problems with multiple servos at the same time due to parameter errors, and make troubleshooting much easier.
Communication outages can often become a huge headache. When facing a communication interruption situation, you first need to clearly distinguish whether there is a problem with wired communication or wireless communication. If it is wired communication, then focus on checking the quality of the wires, because inferior wires or too long lines are likely to cause signal attenuation, thereby affecting the communication quality.
If wireless communication is interrupted, you have to pay attention to whether there are interference sources around you. Equipment such as high-power motors and routers may cause interference. At this time, you can try to change the channel or change the location to improve the wireless communication situation and try to restore normal communication.
A more insidious issue is grounding. In a multi-servo system, if the control panel and servos are not on the same ground, the signals are easily confused. You need to use a multimeter to measure the resistance between the control panel GND and the servo GND. There should be continuity. If they are not on the same ground, connect the ground wires together and many strange faults will disappear.
Insufficient preparation of tools makes inspection particularly laborious. It is recommended that you prepare the following: a multimeter is necessary, which can measure voltage, continuity and resistance; a screwdriver set must be complete, as screws of different specifications may be encountered; and spare cables and power adapters, quick replacement and verification can save a lot of time.
Also don’t forget the preparation work at the software level. The control panel debugging software must be installed on the computer in advance, and the servo manual and parameter table should be properly stored in the mobile phone. In this way, relevant information can be easily accessed at any time during the entire inspection process, and once an uncertain parameter is encountered, it can be checked immediately. It is best to prepare an extra notebook to record in detail the specific steps of each inspection and the problems found, so that the problem can be located more quickly during the next inspection.
Many people wait until there is a problem with their equipment before checking it out. In fact, regular inspections can avoid a lot of trouble. For example, spend ten minutes a week to see if the cables are frayed, whether the cooling fan is running, and whether the screen display is normal. If these small problems are discovered and dealt with early, they will not turn into big troubles such as equipment downtime and project delays.
What's more, regular inspections can accumulate valuable experience. In the process of continuous inspection, you will gradually understand the condition of the equipment, know where problems are likely to occur, and which parameters are the most sensitive. In this way, when debugging new products in the future, you will have peace of mind and be able to deal with various situations more calmly.
Furthermore, regular inspection of the data records produced plays an important role. It can help you accurately judge the service life of the steering gear and control panel, and make a spare parts procurement plan in advance based on this information to ensure that the project will not be interrupted due to equipment failure and that the entire work process can proceed smoothly and stably.
When was the last time you checked the servo control panel in your hand carefully? Welcome to chat about your troubleshooting experience in the comment area!
Update Time：2026-03-21
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