&struder extruder 1.75mm direct drive with adapter and optional

Summary this is a quick fit extruder designed by &makers group that can extruder almost everything, from PLA to rubber, including nylon, ABS, HIPS, ecc only one adapter printed piece can make this extruder of Wood multitool usable in prusa i3 the dragon is printed using this extruder at 50 micron resolution you can buy it assembled from ebay: http://www.ebay.it/itm/221765281569?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 here a video with extruder in action: https://www.youtube.com/watch?v=p8-8MjglPV4&feature=youtu.be Instructions to build one need few external things: 1 hobbed bolt for direct drive external diameter 12mm 4x m4x20 bolt 4x m4 nut 4x m4 washers 4x m3x35 bolt 1x hotend with 18 or 16mm fit 1x nema 17 stepper motor 1x fan with heatshink (like photo) 1x 5x18.4mm (a bit less) smooth rod 1x 16x5x5 bearing 1x strong spring (i will publish seller) if want build magnetic quick fit: 2x 6x17mm metal smooth rod 2x 20x3mm with 5mm center hole with chamber neodimium magnet (can find on ebay) 2x case fan screw (i will add instrution to assebly soon) parameters to make it work: marlin extruder step/mm 94 with 1/16 microstepping slic3r extruder max speed 30 mm/s (can be more if give more current to the motor is recomanded to use drv8825 drivers, if use A4988 sometime not give enough current to the motor expeciall using 2,5A nema 17)