Custom RFID keychain logo fob

prusaprinters

<p>Our makerspace is switching to a keyless entry system using 125 khz EM4100-compatible RFID tags. I wanted to design a 3D-printable custom keychain that incorporated our logo. These are the result!</p> <p>The fob is designed to printed with two pauses: one to insert the RFID tag and keychain, and the second to change filament colors. I'm rather pleased with the result!</p> <p>To make the fob as small as possible, I'm using <a href="https://www.aliexpress.com/item/32847018449.html?spm=a2g0o.placeorder.0.0.5d23321eMCiVnu&amp;mp=1">these 18 mm RFID tags from AliExpress</a></p> <p>And these keychains from Amazon:</p> <p>However, the dimensions of both parts are included as parameters in the Fusion 360 model, so it should be easy to update to whatever size you require.</p> <h3>Print instructions</h3><h3>Category: Keychains Summary</h3> <p>Our makerspace is switching to a keyless entry system using 125 khz EM4100-compatible RFID tags. I wanted to design a 3D-printable custom keychain that incorporated our logo. These are the result!</p> <p>The fob is designed to printed with two pauses: one to insert the RFID tag and keychain, and the second to change filament colors. I'm rather pleased with the result!</p> <p>To make the fob as small as possible, I'm using <a href="https://www.aliexpress.com/item/32847018449.html?spm=a2g0o.placeorder.0.0.5d23321eMCiVnu&amp;mp=1">these 18 mm RFID tags from AliExpress</a></p> <p>And these keychains from Amazon:</p> <p>However, the dimensions of both parts are included as parameters in the Fusion 360 model, so it should be easy to update to whatever size you require.</p> <h3> Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Prusa</p> <p><p class="detail-setting printer"><strong>Printer: </strong> <div><p>Mk2.5s</p>&lt;/div&gt;<strong>Rafts:</strong></div></p> <p>No</p> <p><p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p>&lt;/div&gt;<strong>Resolution:</strong></div></p> <p>Variable</p> <p><p class="detail-setting infill"><strong>Infill: </strong> <div><p>10%</p>&lt;/div&gt;<br/> <strong>Filament:</strong><br/> Sunlu PLA Black <br/> <p class="detail-setting notes"><strong>Notes: </strong> </p><div><p>To enhance resolution on the top surface of the fob, I used variable layer height in PrusaSlicer, changing from 0.2 mm on the lower section to 0.7 mm in the top mm. When I do full production, I'll probably change to 0.3 mm on the lower parts to speed printing. </p> I inserted an M601 pause command at 4.2 mm to insert the RFID token and keychain, and an M600 filament change command at 5.3 mm to change filament colors.</div></div></p> <p>The keychains should be inserted exactly as pictured, with the larger connecting ring angled to avoid interfering with the nozzle.</p></p></p></p>