KIS extruder - direct drive Nema 17 & Mk8 for 1.75 filament

prusaprinters

<p>KIS-(Keep It Simple) Mk1 extruder for 1.75 filament</p> <p>Using ideas from all over the net i have developed a simple adjustable tension DD extruder based on a Nema 17 &amp; Mk8 filament drive bush.</p> <p>The push fit for bowden tubes is based on the items supplied by E3D with their V6 kit.</p> <p>The fitting sits in a 10mm dia hole 10mm deep and once in place a 2mm drill is used to drill through the printed holes and drill the sides of the push fit fitting. Following which 2 short lenghts of 1.75 filament can be inserted to secure the fitting in place. In itself quite secure and stable but to be on the safe side i use a small amount of hot glue as well.</p> <p>Parts list</p> <p>Mk8 drive bush</p> <p>Spring ( 8mm OD X 18mm long)</p> <p>Allen socket head M3 X 20mm &gt; 3 pcs</p> <p>Allen socket head M3 X 16mm &gt; 1 pc</p> <p>Allen socket head M3 X 12mm &gt; 1 pc</p> <p>Allen socket head M4 x 10mm &gt; 1pc</p> <p>M3 plain washer</p> <p>SKF bearing 624-2Z</p> <p>As an alternative spring guide bolt, a single Allen head M4 X 10 can be used ...(same bolt as holding the bearing in place) (as in the phtoto) in place of the M3 X 12 &amp; M3 plain washers</p> <hr/> <p>Update 8th April 2015&gt; Lever and body updated to R1</p> <p>Minor geometry updates to improve pinch action on filament</p> <hr/> <p>Update 5th Apr 2015 &gt; added a couple of simple bracket options which both require longer screws ( M3 X 25)</p> Category: 3D Printer Extruders