butterfingers wrote: For PLA it's recommended to use a fan to cool the cold side of the J-Head.
orcinus wrote:Not an expert, but AFAIK, the idea is to cool the PLA you've just printed, not the cold-end.
To prevent sagging.
IPvFletch wrote:Is it JUST the J head nozzle which requires cool-end cooling? What about the DIY hot ends that are basically just drilled out bolts with a heater block on the lower portion??
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