Another dead cooling fan?

[Steve T]

This is a replacement fan that has less than an hour on it! It's a 12V which replaced a 12V running on 24V I believe. I don't know if the culprit is the newest version of S3D I just updated to or if my M2 24V version just eats these things. Reason I ask about S3d is because when I started the cooling fan by raising the speed controller in the machine panel the blade started twitching but wouldn't run and I can't get it to run anymore. It also gave out that hot oily smell. I know to use 100% power on these so I'm in the clear of any wrong doing. Can anyone tell me what they're doing to resolve the 50mm fan meltdown issue? Thanks a bunch!
Steve

[jsc]

The 50mm fan runs off of 24V. You should use a fan spec'ed for 24V in that location. Previous firmwares limited the duty cycle to 155 (/255) to prevent fan frying. MakerGear has 24V 50mm fans now.

[rpollack]

The 50mm fan is a 24v fan. If you use a 12v 50mm fan then you have to limit the voltage (PWM). If you run a 12v fan over 12v, it can catch on fire.

The 40mm fans are 12v fans but they are wired in series.

Note: these comments only apply to M2s using a single 24v PSU.

Rick

[jimc]

run a 12v fan over 24v ^^

[rpollack]

right - If you run a 12v fan at 24v it will burn out or catch on fire.

[Steve T]

The 12V 50mm fan I'm refering to was sent to me by MakerGear under warranty to replace a previously burned out fan. Was I sent the wrong one? Bummer.