April 19th, 2012, 11:34 AM #1
- Join Date
- Apr 2012
I have a CD for a class I have to take but when I put the disk in the whole laptop vibrates, loudly. I took the disc out and put it back in but it did the same thing. Any ideas or suggestions?
April 19th, 2012, 12:20 PM #2
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Is the disk readable?
It is just the drive running at max speed.
I know 1 thing that will make a drive do that, is a bad disk, that it cant read.
If the disk is readable and OK, the only thing you can do is get another drive.
Seems to me, once in a while, even a good disk, will run at max speed, but don't know why.
A 48X CD ROM turns @ about 24k RPM.
That is exotic speed, (even for that diameter) and needs perfect balance, so any damage to the label, or dust, can effect vibration.
Last edited by stroyal; April 19th, 2012 at 12:22 PM.Hard Sayin Not Knowin
April 19th, 2012, 01:11 PM #3
If you can't balance something, for a particular RPM, you change the mass, or stiffness.
In this case, put your hand on the laptop, above the CD, and it should calm down a little.
Can you copy the disk to your computer, and use it from there?
At least you wouldn't have to hold your hand on the laptop, for more than a few minutes.
Your laptop is probably sympathetically vibrating, to that particular frequency.
No rotating device, is smooth through the whole RPM range.(even perfectly balanced)
There is always at least 1 specific speed, that it will vibrate.
This is called critical speed. and devices are designed to not run at critical speed, or to minimize the running at that speed
Believe it or not, it is because the vibration frequency, is the exact same length, or a multiple of the length of a part or parts in your laptop.
The manufacturers probably made the critical speed at the top speed, because it probably rarely runs that speed.
Last edited by stroyal; April 19th, 2012 at 01:15 PM.Hard Sayin Not Knowin
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