Retractable Pen (PIP)

prusaprinters

<h4>This is a fully working print in place pen with retraction mechanism by twisting the lower ring 120° to move the refill out.</h4><h4>&nbsp;</h4><h4>Print</h4><p>The test can be used to ensure to meet the 0.35mm clearance spec</p><ul><li>max nozzle = 0.4 (thinnest wall is 0.4)&nbsp;</li><li>internal support needs layer = 0.08 also for smooth mechanics&nbsp;<ul><li>&nbsp;if you scale this up in z - increase layer height accordingly e.g. 0.08*1.25 (125%)=0.1</li></ul></li><li>use a brim or raft for stability</li><li>no supports</li></ul><h5>post Print</h5><ul><li>To make this working start with wiggling the ring and twist a little until the internal support breaks free.<ul><li>Use a stick or refill from the back to move the internal slider for the first time. And twist the Ring until it fully moves and rotates 120° or ⅓ turn.</li></ul></li><li>Use a little grease or PTFE/Silicone Spray for best performance</li></ul><h5>Refill</h5><p>put a 3mm in from the front - if it is too long the excess will come out at the end so you can cut it (or leave).</p>