PCB Feet/Standoffs for M3

prusaprinters

<p>Basic "I don't want my protoboard shorting or gouging holes in my desk" feet/standoffs for M3-drilled 1.6 mm thick PCBs.</p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Prusa</p> <p class="detail-setting printer"><strong>Printer: </strong> <div><p>I3 MK3S</p></div> <p><strong>Rafts:</strong></p> <p>No</p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p></div> <p><strong>Resolution:</strong></p> <p>0.2 mm</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>15%</p></div> <p><strong>Filament:</strong> Eco Tough PLA Yellow</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>These will have a bit of play once installed, but they shouldn't fall out.</p></div> How I Designed This =================== <p>“In a hurry” sums it up quite well. I had to get a load of demo PCBs out for my former employer, and I noticed they were likely to tear chunks out of any desk they were put on. So the model was written in under 5 minutes and put up here without another thought. And of course it gets front-paged and picks up thousands of likes ☹</p> <p>To answer questions from the comments: it's meant for M3-drilled (3 mm diameter) PCBs 1.6 mm thick. For smaller holes you can scale it.</p> <p>The code is currently uncommented, un-paramterized and has no documentation because it was meant as a throwaway. But if you want to modify it:</p> <p>// circuit board feet - scruss, 2021-03 $fn=64;</p> <p>difference() { union() { cylinder(d=12,h=5); cylinder(d=2.8,h=8); translate([0,0,7])intersection() { cylinder(d1=3.5,d2=2,h=6); cube([2.8,10,20], center=true); } } translate([0,0,6+20/2])cube([20,0.6,20], center=true); }</p> <ul> <li>The M3 diameter is represented by the values "2.8" in lines 7 and 10. The "3.5" in line 9 is the "a bit more than M3" so the standoffs won't fall out.</li> <li>The 1.6 mm thickness is modelled by the 2 mm distance between the 5 mm high base line 6) and the retainer part translated 7 mm up (line 8).</li> </ul> <p>Good luck! One day I might parameterize this …</p> </p></p></p> Category: Electronics