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-   -   DD D4 12v pump Prob (http://forums.procooling.com/vbb/showthread.php?t=9839)

M_D_K 06-17-2004 09:03 PM
DD D4 12v pump Prob
 
Hi

I've got a DD D4 pump and its making a load buzing noise is this normal, i don't think it should be so load. Hence my concerne, i think its broked but just making sure so i thought id ask the experts on this one.

Thanks.
morgan.

jaydee 06-17-2004 09:12 PM
How long has it been running? All the air out of the system?

M_D_K 06-17-2004 09:21 PM
been running about 8 hours now and there no air atall its not a gurgaling air noise its a buzing noise.


morgan.

RedViper 06-17-2004 09:42 PM
Jesus, I hope it isn't something with the deisgn. Mine will be here Saturday. :shrug: Don't some pumps have a burn-in period?

M_D_K 06-17-2004 09:49 PM
i hope this one does, damn thing is anoying. i have my fan on 12v instead of 4 so i don't here it.

Will see what its like tomorrow maybe it needs to get used to running or somin.


morgan.

TerraMex 06-17-2004 10:01 PM
"It's not a bug, it's a feature."
It seems D4 pumps do that type of noise .

Quote:
Originally Posted by Cathar
The noise would most likely be from the flipping magnetic fields of the brushless micro-controller introducing small vibrations. The Laing engineer said that a square-wave generator pattern is used to flip the fields, and indeed if you've ever listened to a square wave through a speaker, there is a striking similarity to the tone of the noise heard that the pump makes.

caxis0 06-17-2004 10:34 PM
Quote:
Originally Posted by TerraMex
"It's not a bug, it's a feature."
It seems D4 pumps do that type of noise .
http://www.dangerden.com/images/pump...d_chart_lg.jpg

It's not really a very quiet pump. You might try dampening it by wrapping some foarm around it, or if possible, you might try suspending it from the case frame with elastic or stretch magic. Do you have any dampening material between the pump and the case? The case may be amplifying the noise--especially if it's aluminum.

Bruce

M_D_K 06-17-2004 11:05 PM
its bolted to the case with the bit of foam that they supply inbetween the case and the stand.


morgan.

RedViper 06-18-2004 12:37 AM
I was planning on mounting mine with industrial velcro. I hope that works.

killernoodle 06-18-2004 10:42 AM
That would work better becasue ther is no metal/metal contact as you would have with bolts. Velcro works great for pumps, especially if you attach velcro on top of some foam and then the foam to the case.

RedViper 06-18-2004 10:52 AM
Quote:
Originally Posted by killernoodle
That would work better becasue ther is no metal/metal contact as you would have with bolts. Velcro works great for pumps, especially if you attach velcro on top of some foam and then the foam to the case.
That's good to hear and thanks for the advice. What sort of foam would be best? BTW, dangerden says the D4 generates about as much noise as a typical 80mm fan. That ain't silent, but I can easily live with it in comparison to what I'm using now.


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