Hot answers tagged

4 votes

What exactly are PPM controlled ESCs? Are most ESCs available to build quadcopters PPM Controlled?

I believe there is confusion about these terms. Strictly speaking, the ESC is PWM controlled. Although the signal usually gets there from a transmitter and receiver signal that is PPM encoded. It ...
user avatar
  • 1,027
4 votes
Accepted

How to control ESC from Arduino?

There are quite a few issues I see with your setup. You are setting up the ESC in your code to use pin 9, but your diagram shows that you've connected to pin 8. Pin 8 won't do anything because the ...
user avatar
  • 14.7k
3 votes
Accepted

Pure Arduino Quadcopter

What is the problem you're having? You ask, "Can anybody figure out what I'm doing wrong?" but you don't state clearly what your problem is. Will the motors not spin up after? Is anything ...
user avatar
  • 14.7k
3 votes
Accepted

thrust measurement

Okay I thought I'd move this to an answer because I think this will help clear up some confusion you have. First, if you are trying to plot RPM vs Thrust, then your battery, ESC, power, etc. have ...
user avatar
  • 14.7k
3 votes
Accepted

Voltage rpm relation

You can't understand this because you don't know what you observe. The electromotive force (EMF) of your motor is proportional to its speed (the ratio is called Kv). So, when the speed of your motor ...
user avatar
  • 231
3 votes

How to control a dc motor

Yes, as this motor is rated for 100amps stall at 12V you should probably be using a motor controller capable of supplying that amount of current. Regarding how to drive the motor, the following may ...
user avatar
  • 306
3 votes
Accepted

Why can't i use different ESCs together on a multirotor?

Ideally, when you raise the collective all the way up, all the ESCs put out their max power and the quadcopter goes straight up. Different ESCs will end up producing different maximum thrusts; and ...
user avatar
  • 4,385
3 votes
Accepted

Will a 20amp ESC run a Turnigy 2213-980?

In process of selection of components for multirotor, one should start from motor as it is the driving component. Maximum current drawn by your motor is given by manufacture which is 15A. Now your ESC ...
user avatar
  • 633
3 votes
Accepted

Does it matter if my electronic speed controllers are close to my brushless motors?

First, you can look at Mikrokopter as an example of quad with centrally mounted ESCs. As for the various engineering reasons for ESC location, here is some rationale behind the two you mentioned 1) ...
user avatar
  • 2,679
3 votes
Accepted

What happens when a brush-less motor stalls?

Your equipment will be fine as long as the stall periods aren't too big(like 5 minutes). I think the first thing to fail is the ESC as you're using half the voltage the motor is rated for. You also ...
user avatar
3 votes
Accepted

Over-voltage on a brushed electronic speed controller

Well over voltage at an ESC usually results in an instant magic smoke. I would never recommend this. If you have enough reserve power you can use the 3S version. If you are not sure or do not have ...
user avatar
  • 1,647
3 votes

Electronic Speed Controller

It depends on the voltage. Say you are running 12V: 1820W / 12V = 151A With a 24V system: 1820W / 24 = 75A
user avatar
2 votes

Purpose of programming an ESC

An Electronic Speed Controller can be used in various situations, and rather than make 20 different speed controllers for every different situation, they make one which is programmable. The options ...
user avatar
  • 6,337
2 votes

Electronic Speed Control Concepts

First a little warning: This answer is one big AFAIK. I have some limited experience with RC electronics and don't know anything about industrial servos, and other simillar stuff :-) BLDC motors (...
user avatar
  • 729
2 votes

Why do my ESCs stop working?

I use those RCtimer ESCs and they have always worked great for me, generally thease (and most) ESCs will be looking for 50Hz pwm with a period between 1-2ms, though generally you will not damage them ...
user avatar
  • 1,909
2 votes
Accepted

Quadcopter Throttle and PID mixing to Motor Speed

For each motor the output should be: A value at which the power from the 4 motors roughly keeps the quadcopter airborne, for instance 1500ms. Plus or minus the influence of the throttle. For instance ...
user avatar
  • 478
2 votes

What happens when a brush-less motor stalls?

Motors stalling can take many amps as you have found out. In the electrical industry three types of overload cut out are available. fuse, trip, auto resetting trip. A more suttle way is to monitor ...
user avatar
2 votes
Accepted

What exactly are PPM controlled ESCs? Are most ESCs available to build quadcopters PPM Controlled?

I'm not an expert re: PPM communications but, from what I can tell, PPM signals contain pulses which are interpreted by the receiving microprocessor (or speed controller) as position commands. If the ...
user avatar
  • 4,326
2 votes

Can I connect the Arduino usb to laptop after the Arduino is started?

What exactly is the question? I'm not sure, so I'll describe one system I have, and hope you find your answer somewhere in this description. I connect my Arduino USB cable to my laptop all the time, ...
user avatar
  • 4,385
2 votes

Why does the ESC stop?

First of all I would suggest calibrating them. From the eBay page you linked to, It would seem that the ESCs are probably HobbyWing (or HobbyWing clones). I would suggest finding some spec sheets for ...
user avatar
  • 1,027
2 votes
Accepted

Bldc motors erratic behavior with Arduino program

Can you make a written description (comments, text, or block diagram) of what you think the code is supposed to be doing? I can't figure out what your whole timer scheme is supposed to do. Here's ...
user avatar
  • 14.7k
2 votes
Accepted

wheeled vehicle forward velocity from RPM brushless data

This project does exactly that on an RC car. The author is a top competitor in the DIYRobocars community; it's the blue car in this video. He uses tachometry from the brushless motor, an IMU and ...
user avatar
  • 296
1 vote

What exactly are PPM controlled ESCs? Are most ESCs available to build quadcopters PPM Controlled?

In Radio Control lingo, we refer to PWM (Pulse Width Modulation) to describe a very specific control signal, instead of a power signal. Check the wiki article for more info. This doesn't carry the ...
user avatar
  • 510
1 vote
Accepted

How to use specific ESC,BLDC motor through Arduino Uno R3?

An ESC needs to have the throttle limits adjusted before you can use it. While there are many options you can set from a programming menu (see page 4 of this PDF for reference), the throttle ...
user avatar
  • 14.7k
1 vote

Is it safe to give 5v through 5v pin of arduino uno r3 while usb cable inserted

It should be completely safe. Assuming that the 5V BEC on the ESC is not damaged then it is providing a regulated voltage to your Arduino. Furthermore, the USB port on the Arduino is protected from ...
user avatar
  • 1,027
1 vote

thrust measurement

Try to couple the batteries with voltage regulator. A simple IC DC regulator would do. It would help maintain the input voltage of the motor and helps getting the relation between RPM vs Thrust ...
user avatar
1 vote

Brushless DC motor - Electronic Speed Control - Quadcopter

First thing first: you can't observe your rotor's location at 0 speed, because at 0 speed, you've got no back EMF. You must make your motor ramp to a speed that allows you to observe it electronically....
user avatar
  • 231
1 vote

Why do my ESCs stop working?

It doesn't seem like those motors are well matched to your battery. They recommend a 2or3 cell LiPo (7.2V or 11.1V) while you are using a 1 cell LiPo (3.6V). I think you'll find most motors will ...
user avatar
  • 1,027
1 vote
Accepted

Controlling an ESC for Brushless Motors with an RPi

Operating an ESC is practically the same as operating a servo. The main difference is that instead of the pulse width translating to a position on the servo, it translates to an output speed. The ...
user avatar
  • 1,027
1 vote

Quadcopter multiple ESC angles glitch

To me, the straightforward explanation seems that you are applying a desired torque, but on multiple motors -- when you use 1 motor you get 1× torque, and when you use two motors you are getting ...
user avatar
  • 10.8k

Only top scored, non community-wiki answers of a minimum length are eligible