To get straight to the point, yes, as everyone else has mentioned. No instructions. However, if you're careful when you take off your old extruder, it's an easy process. I've been trying to get a large nozzle (1.0mm) to work on my Ender 3 Pro for fast drawing to no avail. The default extruder laughed in my face and jumped like a record when I tried to print 1mm. I installed this extruder and didn't really expect much of a difference, but tried all other suggestions to fix extruder jumps. Slowed down the print, adjusted the Zed offset, changed the stepper motors, checked the step voltage and so on. Long story short, I installed this guy and ran some tests. I started with a layer height of 0.6 at a print speed of 30. No problem. I was surprised. So I jumped to 0.8 at the same speed. No questions. I went crazy and jumped as far as I needed: 1mm layer height at 50mm/s (my usual speed for PETG). OK. Holy shit, it started with no problems. You can watch your spiral escaping its life at this altitude and speed, but now it is doing an amazing job. Just switch from the extruder. Buy it. Buy It Now. By the way, you can adjust the layer height of the nozzle, but you need to know how to adjust the slicer. Most people recommend no more than 75-80 percent, which is ideal if you don't want to mess around too much.
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