differential screw clamp

prusaprinters

<h4><a href="https://en.wikipedia.org/wiki/Differential_screw">How does this work</a></h4><p>You close the clamp by turning the knob (clockwise) while pressing the lower part against the object. &nbsp;The high pitch (p=10) will move the clamp fast until the second clamp touches the object.</p><p>Now the second clamp has contact and the thread starts to move, but it moves a little less then the first clamp (p=8) - so the differential is low and allows to apply 5× more force.</p><p>So for the last ½ turn the clamp moves not 10mm/turn but only 2mm/turn - this also generates self-retention. This will compress only 1mm further!</p><p>The coil will bring the 2nd end always back into position.</p><h4>Post print</h4><ul><li>As tensile stress on layers is not the ideal for printed parts there is a 3.5mm hole, so you could glue a rod in.</li><li>Use grease as friction need to be kept low</li></ul><p>&nbsp;</p>