How much noise are scanners supposed to make?

[FourDee]

I've just finished putting together my first rgb (pics soon )

I'm running DT40's from an FB3 and I was just wondering, how much noise are they supposed to be making?

When i display abstracts and simple things, they are pretty much silent, but when I'm scanning more complicated stuff, they make more noise.

How do I know if I'm hurting them? They don't get hot even after an hour of running, so I'm pretty sure there's no harm done.

[soforene]

...How do I know if I'm hurting them?

Oh you'll know.
I was playing with the oscillator on my LD2000 and increasing the complexity to the accompaniment of an increased whining from the scanners.
As I turned it higher, the pitch increased.
Until it all went quiet and the light was no more.

Luckily some kind of cut out had prevented me from doing permanent damage but it was one of those moments when you get that cold shiver and you think "Oh fu#@ !!" (I think most laserists have experienced it).

[FourDee]

Hm ... sounds scary

[andy_con]

hahaha

you should hear mine!!! mine have been to bill to tune and they are so bloody noisy.

[DZ]

Scanners can be very noisey, it doesn't mean that there is a problem though. Think about it, the inside of a scanner consist of a coil of wire that moves a shaft, sound familiar? A speaker should come to mind. The signal you send to them is in the audible spectrum. The newer scanners don't have torsion bars, but with older scanners, G-124's, G-120's and even the GM-20's, you can connects these directly to an audio amp and listen to music from the scanner!

[tocket]

Yes, they can make a bit of noise displaying certain patterns. However, their protection circuit will generally kick in before damage is done if you send some bad waveforms. I've managed to trip this a few times and (with laserworld scanners) either got one of the amps to shut down or lock one of the galvos to its max x-value.

Scanners can be very noisey, it doesn't mean that there is a problem though. Think about it, the inside of a scanner consist of a coil of wire that moves a shaft, sound familiar? A speaker should come to mind. The signal you send to them is in the audible spectrum. The newer scanners don't have torsion bars, but with older scanners, G-124's, G-120's and even the GM-20's, you can connects these directly to an audio amp and listen to music from the scanner!

Why wouldn't it work with newer scanners as well? I did it with my laserworld galvos before I had a DAC and you could certainly hear the music.

[DZ]

Why wouldn't it work with newer scanners as well? I did it with my laserworld galvos before I had a DAC and you could certainly hear the music.

I'm sure it would. I suspect though, that you'd need to run the audio signal through the galvo's amp, instead of running it through any kind of audio amplifier. A galvo with a torsion bar returns to center, I suspect with these newer galvo's, you'd just end up racking it to one side.

[tocket]

Oh, I get it. You were talking about running the galvo straight from the audio amp. I just connected the galvo amp to an audio source.

Yes, it'd probably not work that well with new galvos.

[Laserman532]

I've just finished putting together my first rgb (pics soon )

I'm running DT40's from an FB3 and I was just wondering, how much noise are they supposed to be making?

When i display abstracts and simple things, they are pretty much silent, but when I'm scanning more complicated stuff, they make more noise.

How do I know if I'm hurting them? They don't get hot even after an hour of running, so I'm pretty sure there's no harm done.

Well....WWWEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEW WWWWWWWWWWAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AWWWWWWWWWWWWWWWWWWWWWWWWWWWAAAAAAAAAAAAAAAAAAAAAH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH is good.

WEEEEEEEEEEEEEEEEEEEEEEEE CLICK PLUNK is bad.

[dsli_jon]

Well....WWWEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEW WWWWWWWWWWAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AWWWWWWWWWWWWWWWWWWWWWWWWWWWAAAAAAAAAAAAAAAAAAAAAH HHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH is good.

WEEEEEEEEEEEEEEEEEEEEEEEE CLICK PLUNK is bad.

Hahahahaa - Lol - you're funny, Cap'n!... also, WEEEEEEEET WEEEEEEEET WEEEEEEEET WEEEEEEEEEET with nothing projecting, is not so good, either...

j