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Could you speak up a little?

hp-65

By hp-65
in UltiMaker 3D printers

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jonnybischof

jonnybischof 60

Posted
Posted · Could you speak up a little?

The two side fans on the UM2 are hooked in series to 24V so they each receive 12V. Although if one shorts out the other will receive 24V. Also this means if one fails in the open state the other will shut off.

It also means that if you block one with your hand while it's supposed to be running, the other one will be overloaded because the DC resistance of the coils is lower than the AC voltage the fans generate to run...

 

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