
Another Sunlu S1 Filament Dryer Fan Mod
prusaprinters
<p>Thanks to jdobry and Buszmen61 over at Thingiverse for the inspiration for the great Sunlu S1 mods. <a href="https://www.thingiverse.com/thing:4729474">sunlu FilaDryer S1 Fan by jdobry - Thingiverse</a>. <a href="https://www.thingiverse.com/thing:4650052">Sunlu & eSUN filament drybox - holders for hygrometer without drilling by Buszmen61 - Thingiverse</a></p><p><strong>PRINT</strong></p><ul><li>PETG, ABS or ASA. Not PLA (it will melt)</li><li>.20mm layer height</li><li>3 layers recommended</li><li>Print 1 of each of the following:<ul><li>Original Direct Fan (wiring instructions on jdobry's link above)</li><li>Rear Ramp, with or without Mount Slot (use factory screws)<ul><li>One of the Hygro mounts, if you need a rear Hygrometer.</li></ul></li></ul></li></ul><p><strong>WHAT I MADE</strong></p><p>I started with the fan from jdobry and created a ramp to encourage air flow around the filament spool. It uses the stock screws from the rear plate. I originally had the S1 facing the back and wanted the hygrometer to be visible, but didn't want to interrupt airflow, so I then made the Ramp with Mount for the Hygrometer mount made by Buszmen61. It worked okay, but was a bit too high. Plus, I printed it in PLA, so it started warping pretty quick. So, I modified it to sit lower and a bit away from the ramp, to allow air to circulate freely, and recommend PETG.</p><p>I included the STL for the fan for easy access. For wiring instructions, I encourage you to hit jdobry's link above and give him a like. Of the designs I saw, this was my favorite. I didn't screw the fan to the lid. I used a single strip of double sided tape and it has been working great for a couple weeks now… almost non-stop. Use a 4010 radial fan, soldered to the power wires. I put a 40C Thermal switch in-line. When chamber temp hits 40, it turns on and circulates the air. When heater turns off, fan keeps circulating air until temp drops below 40. From what I read, this improves efficiency by like 3 times. </p><p>If you have questions, send me a message. I can provide more info. I am no longer using the rear hygrometer, which is why I made the smooth ramp. I am using the front PETG anchor with hygro I also have posted.</p>
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