Extruder 1

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The extruder is my first upgrade on a prototype of my 3D LAD-1.0 printer. I bought the MK8 from "Ali" but it didn't perform well. The clacking of the stepper motor caused the nozzle temperature to rise above optimal and reduced print performance. Printing with a 0.3 mm nozzle was not possible at all. The 52 N * cm torque of the 17HS8401 stepper motor wasn't enough for an 11 mm gear roller. Also, there was a tendency for filament wringing due to the large distance from the toothed roller to the inlet of the bowden tube. Therefore, I decided to build a new extruder with a reduced roller having a diameter of 7.5 mm at the tops of the teeth, which promised an increase in force by almost 1.5 times. This extruder has worked for me over 1000 hours without any problems. The design proved to be balanced, the traction ability of the engine and the toothed roller were almost equal. Filament wringing did not occur, refueling is quite convenient. As a result - only 20 grams of filament and the problem is solved. Notes: Optimized for nozzle printing 0.4 mm, layer 0.2 mm. It's recommended to print from ABS. Files: Ex1-01.STL - Enclosure, Ex1-02.STL - Cover, Ex1-02h.STL - Cover option with increased height gaps to accommodate the lever, Ex1-03.STL - Lever, one-piece with plastic thread for adjusting screw, Ex1-03a.STL and Ex1-03b.STL are the two halves of the lever to be glued together, with space for installing an ordinary M3 hexagon nut. Gluing the lever and threading the M6 for fitting setting is convenient to do in a vice. References: 3Dprinter Lad-1.0