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I also had the extruder drive slipping backwards (clicking sound) as well and narrowed it down to a Cura update that had changed my Ender 3 machine settings from Marlin to Marlin (volume metric). Once changed back to Marlin, all is well now. No over extruding. Before reversing the change, I had to reduce the flow rate to 53 %. Now, I’m back to 100 % and ...


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Things to consider (This is expanded from How is heat creep characterized?): The air volume of the cooling fan on the hotend heat sink affects the temperature gradient across the heat sink. Usually the size/geometry of the fan depends on the printer design, so the main parameter of a fan that controls air volume is the rpm. I've noticed fans fitting ...


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The push to release connection on the top of the heat sink may be secured with thread lock adhesive, but you should not have to remove it. Push the blue ring downward while pulling upward on the bowden tubing. It may be necessary to work it up and down while you push down on the blue locking fitting. I have to use a pair of pliers to hold the blue ring down ...


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