BEEP sound from motor

<< < (6/7) > >>

jerry:
I am glad some of you already found about this. :thumbsup:

for unbelievers ;D the ESC creates high frequency linear waves to the motor which in turn produces an audible confirmation tones and beeps. Wonder how a motor makes a sounds? :headscratch: The motor acts as an electromagnetic field and the high frequency waves are what we hear..crazy huh?

And those who said sound cant be made without a diaphragm

There is an amazing invention called plasma speaker.. Google it or look this video :)

jerry:
Schematic for plasma speaker - http://www.instructables.com/files/deriv/FAT/15CV/FTY4CMXZ/FAT15CVFTY4CMXZ.MEDIUM.jpg

chanvivek:
In fact, even I am under the strong impression that the motor makes the beeps. If not, then try programming an ESC without connecting the motor.. There would be no beeps.. Logically, the ESC should beep whether the motor is connected or not.. Never seen an ESC beeping without a motor being connected..

;) ;)

This also reminds me of a comedy scene from a Tamil movie.. Do you snore thru your mouth or thru your nose??

- Chan

vinay:
It is 100 Percent that the motor makes the beeps. It fact the turnigy ESC plays the whole start up/arming music(16 melody selectable) using the motor. I have 4 different kind/makes of ESCs and none have speaker. I was surprised the first time when I heard the sounds coming from the motor 2 months ago(when I first got hands on my first HC parcel.) A speaker is nothing but magnet, coil and diapharm. The motor is nothing but coil, magnet and a rotating body. Since the outrunners are AC motors and the signals can be sent over 3 wires in such a pattern so as to make the motor body vibrate in such a pattern that it creates that music. No big engineering here, but its pretty surprising :D.

What I have noted is that since there is no diapharm, a motor cannot sound as beautiful as a speaker and cannot make all frequency sounds. For example the same esc connected to a TP bell motor sounds loud and when connected to the turnigy non-bell motor sounds weak.

If you are still not satisfied that the motor makes the beeps, disconnect the motor and then try programming now(at your own risk, make sure that the ESC output wires are NOT touching each other.). You wont here any beeps. ;D

Its fair that people not notice this because the ESC and motors are always near. 3 to 4 inch apart max and they think its ESC making sound. ;D

EDIT:

Chan,

Its good that motor should make the beep and not ESC, because its the motor thats armed and rotates not the ESC. So more meaning full for motor beeping and reducing price of ESC by not putting a buzzer there.

anwar:
Quote from: vinay on January 12, 2010, 08:40:32 AM

If you are still not satisfied that the motor makes the beeps, disconnect the motor and then try programming now.

Actually we see this all the time, but that alone does not indicate that it is the motor that makes the sound. It could just as easily be thought of as the ESC's way of indicating that a "motor is not connected".

Navigation

 Message Index