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Fans not working?

Posted: Fri Apr 03, 2015 8:38 pm
by Bobbystone
I just noticed that my fans don't appear to be working at all. The fan to cool the extruders works, but the two that cool the print don't work at all, even when trying to activate from the printer control. Any thoughts?

Re: Fans not working?

Posted: Mon Apr 13, 2015 7:43 pm
by Bobbystone

I took the cover off the electronics case and measured 10v at the fan outputs. Next, I removed the fans and shrouds from the extruder head and discovered that the positive wire on each fan had broken. I carefully soldered the wires back and tried to get a bit more slack in the wires. I also put a drop of hot glue over the wires where the enter the fan case in the hopes that will protect the solder joints in the future. I imagine that when the wore harnesses are wrapped, the wires get a bit too tight and pull loose. The tiny fans have very fragile connections, but it wasn't too difficult of a fix.