Vibration/sound from Servo motor (HS-755HB)

Lynxmotion Robot Arms
1

I purchased an AL5d arm .
When the Servo sequencer utility detects the servos , a small sound/vibration is heard from HS-755HB . (Elbow servo)
On touching it i can feel the vibration . (Not in any other servos. Only HS-755HB).

Is this a problem ?

Thanks
Varkey

2

Hi Varkey,

We will need more information to be able to help you. See our questions below:

If you move the various servos, does the sound/vibration continue/increase/stop/change? Also, does that servo motor heat up significantly?
If possible, remove it from the brackets completely (so that it has no load) and try the servo by itself. Does it still do the same sound/vibration when not connected to anything? Try changing its position and check again.

We await your reply to further help you.

Sincerely,

3

I tried like you said . When NO load is applied , vibration is NOT heard.
But when i fit the aluminium rod (along with grippers and other servo s) to elbow , the vibration starts .

What can be done ?
Please help .

Thanks
Varkey

4

Hi Varkey,

Please note that some vibration and noise is normal with these kind of servo motors when under load. Specifically, the shoulder and elbow servo motors are nearly always under load when the arm is powered and therefore will make some noise/vibration. Would it be possible to record a short video (with sound) of your arm under normal use? It is otherwise very difficult to describe it using words! :slight_smile:

You can either attach your video here or post it on a video site (like YouTube) and copy the link here.

Sincerely,

5

i was not able to upload the video here . (Video size too large )

So sharing the link of the video i saw in you tube .

In the above video, as soon as the servo s are detected , a small sound can be heard . I am facing the similar issue .
Is that a problem ?

(If this is not helpful , i shall share my video somehow ) .

6

Hi,

The sounds made by the motors in this video is perfectly normal! If this is similar to the ones of your motors, then there is nothing wrong with your servomotors or your AL5.

Sincerely,

7

This is the sound heard from my al5d arm .

youtube.com/watch?v=kDOGaCeWB40

Is this an issue ?

8

Hi,

This sounds very normal. RC motors do not lock in place (like some other motors do). If there is any load, they have to constantly “move” to the assigned position, thus making motor-like sounds and vibrations.

Sincerely,

9

Thanks … One more doubt …
How long can i keep the arm loaded ?

10

Hi,

In general, you should try to give the RC servo motors a break every 15-20 mins to ensure they do not get damaged (let the motors cool down fully). This amount of time also depends heavily on the load supported by the arm and how far it is extended (more strain/more torque required if extended further).

Sincerely,

11

Ohhh … kk … Thanks for your help .
The post was realy helpful .