[Share] Make friends by disassembling, you disassemble, you comment and I give you gifts! ---- Disassembling a servo

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[Share] Make friends by disassembling, you disassemble, you comment and I give you gifts! ---- Disassembling a servo [Copy link]

 

I have always been skeptical about domestic servos. Driven by curiosity, I disassembled this servo to see what it looks like inside. I would like to share it with you.

The overall feeling is not bad

The logo is clear

It is quite simple to unpack, just unscrew the screws and open it. I will show you the internal photos directly. The circuit design is quite satisfactory, and the workmanship is quite fine. 360003[/attach]

Here is a close-up. The layout seems reasonable. 360004[/attach]

The wiring is also quite reliable. After looking at the materials used inside, I feel that they are quite good. The main control model is KC9809. I cannot find any technical information on the Internet, but according to the naming information, I personally guess that it is a chip of Kuancheng Electronics. The function of this chip is to receive standard signals from the receiver and control the The MOS tube drives the motor to rotate, and through the feedback of the potentiometer, the servo moves to the specified position. The 360005 motor drive mos is AO4603. After checking the technical manual, I learned that this is a P/N channel composite tube, which means that there is a P channel and an N channel inside. The current of P-mos is -5.8A, and that of N-Mos is 4.7A, which is more than enough to drive a servo.

After removing the circuit board, I saw the power core of the servo, a brushless motor! It is very delicate. The capacitors on the circuit board use very advanced MLCC capacitors. You should know that many Taiwanese servos are still using soybean-like tantalum capacitors. I am quite surprised by this! In addition, the fixing glue is applied to the fixing screws of the potentiometer to prevent the potentiometer from shifting or loosening during vibration, which causes malfunctions. It is still good.

After reading the electronic part, I also disassembled the mechanical part. You can see that the gears are very finely made, indicating that the processing accuracy is very good. In terms of the load-bearing method of the output shaft, this servo uses a front and rear double bearing design. Of course, if it is still a copper sleeve, it is definitely not justifiable at this price.

In addition, after my disassembly, I found that there is no waterproof ring on the output gear of the servo. Try not to put the servo into water. It should be no problem to resist water splashes.

陈韶华

What driver is better for controlling 86/450b stepper motors with Arduino? I have three A4988 modules, but the tutorials online say that they can't drive such large motors.