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Fans not working - solved

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I've just noticed that early in my present print on a UM2 only one of the fans was going round. I just pushed my finger onto blades of the other two and gave a slight push of encouragement and now they are all spinning properly. Is this anything to worry about? Should I do something in the way of some sort of maintenance?

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This is normal. The default settings for Cura I believe are 100% at 5mm so if you have .2mm layers that's the 25th layer. So first layer is fan at 0%, then 4%, then 8%, and around 20% one or both will start up. By 30% they should be both on.


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