By: Ray (IP: 84.65.117.*)
Written on: 03-10-2006 04:03
If a 12v 120mm fan (or any fan for that matter) only starts from stall speed with a prod the fan is getting some juice but not enough to overcome initial inertia OR is getting the full 12V but has dried-out/worn bearings. A fan really only needs minimum juice to keep spinning (in a normal environment) and a dry/worn-out bearing would sound LOUD!
I can mimic insufficient juice with my testbench PC - I have two 120mm 12v 0.28A fans spliced into the main 12v PSU supply via a variable POTentiometer. When the POT is set to |
By: Ray (IP: 84.65.117.*)
Written on: 03-10-2006 04:08
... "minimum" (approx 5V) the fans run won't start. If I prod them they will start.
Check the voltage to these problem fans. If they are at 12V, oil the bearings.
HTH, Ray |
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