Where to use Digital vs Analog Servos in RC Vehicles
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- เผยแพร่เมื่อ 12 ม.ค. 2020
- In last week’s video we covered the advantages and disadvantages of digital vs analog servos. Today we are looking at what type of application in the world of RC is best suited for each circuit type of servo.
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We have learned that digital servos are best for maximum performance. These performance advantages for digital servos include maximum holding torque, smooth torque delivery, and fast servo response time. Digital servos are best used for primary control functions that allow an RC vehicle to change direction.
Analog servos are best suited more for your budget type approach. They are excellent for application that do not require an expensive solution. Also they are the best solution for applications that do not require holding power, fast response time and smooth torque delivery.
When comparing specifications of analog and digital servos, it is important to keep in mind the advantages of each servo. An analog servo that has more torque does not necessarily paint the entire picture for us. - วิทยาศาสตร์และเทคโนโลยี
Can you comment on servo jitter or flutter please. To me that is the most important consideration as it's hard to cure on small 3D model surfaces.
A very nice video! very well explained! Huge Thumbs up!
I have a question for you.
Will an analog servo make a gyro more robotic?
Does it affect the movement on a huge scale or it is not that noticeable?
Hey Chris, thanks for the kind words.
I'm not sure I understand the question correctly. If you are referring to a gyro that controls a servo for example in an RC airplane, I do not notice a difference in behaviour between a digital or analog servo.
@@RCexplained perfect! thank you!
Very interesting! So I bought one of these: Turnigy™ TGY-50090M Analog Servo 20T MG 1.6kg / 0.08sec / 9g for fitting to the aileron control of a plane I built and I noticed that there seemed to be a delay on the reaction of the servo from the time you quickly moved the stick to the time for the servo to complete the motion on the plane. Is this because it is an analog servo or could there be another explanation for this delayed movement. Thanks.
Hello big5astra, thank you for the comment. There could be a number of different reasons as to why you are experiencing sluggish servo response. Are there two of these servos operating the ailerons where both are acting slow? It could be as simple as a defective servo.
I would check to make certain it is not something that is programmed in your radio that could also be causing the delay. If you are unsure, try it with the most basic radio that you have to see if there is any difference in the response time.
The longest delay you should experience with an analog servo is about 20ms. For a control system response time, this is quite long, for human response to be able to notice this, its a relatively short time. I would not expect analog to be the answer to your question.
hey there, for a sailwinch, would you use a digital or a analog servo?
I prefer digital for most applications that need torque in with small amounts of control input. But my sail servo on my old sailboat was analog
Thanks for your share. Help a lots ^_^
Do I need a special receiver for digital servos or do most receivers these days support and somehow do a handshake to determine how to talk to each other?
Most receivers should work with most any servo. As long as it’s outputting GND, +5V (or more), and a 50Hz PWM, the servo does the rest of the work.
Brother can you explain little bit simpler than this
So does a digital servo have wires or no to be hooked to the receiver
A digital servo has the same 3 lead wire that an analog servo has.
Genius great video 👍👍👍. I'm building a limitless & from your video on motors I choose the xo-1 motor 1717 BB 1650kv w/max6 esc. But the gears it comes with 27/34 it believe are considered high & I've searching for a good explanation on gearing the way you explain it. Which I'm looking for good balance like at low speed drifting/bashing (without overheating) & full throttle speed run (when time, space are great). Have you made a video on gearing?
Thanks for the awesome comment!
I do have a gearing video, however, there is a lot to it and it may not cover what you are looking for:
th-cam.com/video/z8QJ347hW0k/w-d-xo.html
Hey Ryan I saw this video and as always learning so much from your videos, and on purpose I have a Rustler which steering analog se is not so precise giving a erratic driving. Nevertheless could you give me your oppinion. I have a brushless combo with a voltage regulator that clocked at 6v 3a maximum, and I have two 5v fans one in the esc and other on the motor and led lights. Like you said the " hungrier" power consumption of a digital could affect the normal performance of this set up? Greatings from Portugal
That is correct. you will want to make certain that your accessories and servos do not exceed the maximum continuous rating of the BEC current. A digital servo will definitely help with more precise steering if that is what you are lacking.
I just installed the Radiolink RC6GSv3 with R7FG into my 2010 E-Revo Brushless
and right now learned that the R7FG does not support digital servos, so it will only run on 14ms
I still have the stock dual TRA2075 servos which are digital (they just haven't broke yet for me ;o)
can running them at 14ms damage them or it just decreases their performance?
kinda pissed, Radiolink do not disclose this anywhere, it's not on the product page, not in manual (only found it in some facebook reply from radiolink themselves)
for monster truck with big tires for sure the digital servo is what you want
I run all my servos on 14ms. Digital or analog and have no desire to change it at this point.
I've enjoyed the last two videos on digital servos versus analog however you didn't mention anything about the need for the proper receiver. Many receivers will not allow a digital to mix with an analog or power a digital servo. Thoughts?
I’m yet to see this be the case. Most servos if the same size use the same 50hz PWM signal. I haven’t found a servo that doesn’t work with this signal yet, but also I’ve never seen a receiver out out anything different. As long as it has ground, power, and a 50Hz waveform PWM signal it should run.
I’ve run digital servos and with a few cheap analog servos on my last several builds (FrSky and spektrum receivers)
@@adamhale6672 May be specific to Futaba FASST receiver R6106 HFC in regards to link mode. They warn against mixing analog and digital in HS mode.
so my friend, let me understand...
if we have two similar cars but two different servos inside, digital and analog.....
and we have one operator that he don't know about the different servos inside the cars.....
when he start operating the cars....He could understand with the use of cars that there is something different to driving this similar cars???
I mean, it is good the scientific explanation, but in practice the operator can understand big difference or some difference?
Yes, if I am familiar with the performance of a car I will absolutely be able to tell the difference. The difference is quite significant.
I had two Hangar 9 Funana 70" 3d planes and just used Hitec 485s a supposedly low spec analogue servo ,I could do hard 3d flying with this set-up and they were silky smooth. Now I use digitals in some planes and the screaming gives me anxiety. If I could buy 20lb analogue servos for my bigger planes I would .
You can get away with analog servos on a swashplate on a helicopter, but a digital servo on the tail rotor pitch control is a must have.
Many Many Many years ago in the rc airplane field ho I say about 25 years ago most of us flyers all we had analog servo's . This is because this is all was offered and they did work great . When the Digital servo came a long and that changed everything . ( Not ) . It just made thing expensive . LOL There is a down side of Digital servo that I dont like . That is Noise from the servo . There are some people have to have the best even at that time . So when the Digital servo came out these people have to have them so they can say ! I have something better than you . That is what it truly means . I am better than you . Just some B.S. . It still did not make them fly any better . They still crashed there airplanes . HA HA HA . I still fly analog servo and still crash my planes . But it's a hell of a lot cheaper to buy Analog . The best thing happen to servo's are metal gear servo's . The only bad thing I can say about the analog servo's is the POT . The POT can fail . The good thing about analog servo is that there is no noise at all . Not until the POT starts to go out and the jitters starts . When that happens then it is the time to replace the servo . I think the best servo would be an analog servo with metal gears and brushless motor . That would be a great servo to me .
You don't mix analog and digital servos . To get the most out of digital you run a higher hz . And that will burn out analog. .. run all digital or all analog don't mix ! Noobs making how to videos lol
Not true. They all recieve the same signal from the reciever. The frequency difference is all in the servo circuit board.
Some specialized high speed modes on some transmitters require digital servos. Lots of rtr heli's have a digital on the
tail rotor and the rest analog.