Mechanical Dual Spring Pen

prusaprinters

<p><strong>/REUPLOAD OF AN EXISTING PRINT. IT MIGHT REACH MORE PEOPLE IN A CONTEST./</strong></p><p>&nbsp;</p><p>&nbsp;</p><p><strong>Hardware requirements:</strong></p><ul><li>1x pen core. 120mm lenght, 3mm diameter. I tested ZEBRA SH-0.5 and ZEBRA BR-6A,</li><li>1x 35mm long, 5mm OD spring (0.4mm wire diameter),</li><li>1x 15mm long, 4mm OD spring (0.4mm wire diameter),</li><li>2x M3x5mm screw,</li><li>1x M3x12mm screw.</li></ul><p><i>To be able to use different sized hardwares I've made the STEP files available.</i></p><p>&nbsp;</p><p><strong>Printing instructions:</strong></p><p>The pen is tested from 0.15mm LH to 0.3mm LH, and they all make excellent pens.</p><p><i>Supports on build plate only</i>, just a tiny bit for the tip.</p><p>The ‘piston’ has built-in brim, so its easier to print.</p><p>With MK3S+ 0.30mm DRAFT it <strong>prints in 45min.</strong></p><p>PLA and PETG is fine, but for optimal results use <i>ASA or ABS</i>.</p><p>~<strong>4m of filament</strong> (~10g)</p><p>&nbsp;</p><p><strong>Assembly:</strong></p><p>The thread is ‘self-tapped’ into the printed parts with the screws.</p><p>Lubricating the moving parts and the locking mechanism is recomended for smoother operation, but not essential.</p><p>The pen core is pressed into the piston. If the fit is too lose, try roughing the surface of the pen core with a knife or reprint the piston with adjusted X/Y size compensation.</p><p><i>Animation to help with the assembly:</i></p><figure class="media"><oembed url="https://www.youtube.com/watch?v=6cCEqWSZHU0"></oembed></figure><p><br>&nbsp;</p>