Heat Deflector/Mixer for Eibos Filament Dryer v2 (smaller)

prusaprinters

<p>SEE ORIGINAL FOR WARNINGS.</p><p>DO NOT PRINT THIS UNLESS YOU ACCEPT ALL RISKS OF USE.</p><p>DO NOT PRINT THIS IN PLA OR PETG. &nbsp;VERY HIGH TEMPERATURE FILAMENTS ONLY.</p><p>BOTH PLA AND PETG ABSOLUTELY WILL DEFLECT / DEFORM AND TEND TO BLOCK THE HEAT VENT. &nbsp;DO NOT USE PLA OR PETG. &nbsp;IT WILL NOT WORK AND WILL LIKELY CAUSE A HAZARDOUS CONDITION.</p><p>This is a cut-down version with a few vent holes (and a “no holes” version without) to hopefully reduce backpressure on the fan while hopefully still preventing hotspots on the filament spools.</p><p>The original version has worked for me so far, printed in PC Blend, with the dryer continuously set to 70 C (the max my dryer can be set to). &nbsp;Measuring temperatures on the top of the deflector, I see little difference between the original version and this smaller version (both with and without holes). &nbsp;See thermal pictures. &nbsp;If anything, the temperature I measure on top of the smaller version is higher, but the temperature of the room wasn't completely consistent between measurements so I think that explains the difference.</p><p>This remix is vaguely comparable to Michael Hathaway's remix, but keeping the .f3d continuity going, the legs still as tall as the original instead of slightly shorter, the flat plate at 1mm like the original instead of slightly thicker, a vent hole pattern that should vent mostly between spools instead of under spools (optional), two more of the original's legs included on left and right and more top surface retained on left and right to try to ensure no hotspot will happen under the outer edges of the spools, the cut outline a bit bigger toward the back and front, and with the license the same as the original (more permissive).</p><p>I'm currently running the smaller version (this remix) with no vent holes in two dryers and that seems to be working fine. &nbsp;I ran the original version for months with no issues. &nbsp;However, your experience may be quite different. &nbsp;It may melt, block the fan, overheat the heater, catch fire, etc; you accept all risks of modifying your own dryer that may not be 100% identical to my dryer, running in a room that may have temperature swings greater than the temperature swings in my room. &nbsp;You accept all testing / stress testing responsibility. &nbsp;I recommend putting a smoke alarm that can trigger other smoke alarms near the dryer, regardless of heat deflector or not, but especially with a heat deflector.</p><p>Printing this in any filament with load bearing temperature below 113 C (PC Blend is 113 C) is even more risky than printing this in PC Blend. &nbsp;As Michael Hathaway's remix description suggests, a garolite sheet can handle much higher temperatures and may be a better choice, especially if you intend to leave your dryer set to 70 C all the time with a surrounding room that might get warmer than usual sometimes. &nbsp;See Michael Hathaway's remix description for ideas (or maybe plans) for legs under a garolite sheet.</p><p>Please don't think that you can print this in PETG if you have the temp turned down below 70 C to dry PLA. &nbsp;The heater runs a fairly slow PWM with a relay (as far as I can tell), so the temperature can swing up and down quite a bit when drying PLA. &nbsp;While the spool itself might have enough thermal mass to avoid problems from the temperature swings drying PLA, a heat deflector printed in PETG will just start deforming the first time the heater is on for a single PWM cycle. &nbsp;Only very high temperature filament has any chance of working without deforming/warping/melting, and as soon as that starts happening, it's likely to make the problem worse. &nbsp;Do not attempt.</p><p>Remixes are welcome/encouraged. &nbsp;Please consider using the .f3d file to make any further remixes more sustainable. &nbsp;Please retain adequate warnings directly on any remixes, regarding very high temperature filament only and the need to stress test for each dryer. &nbsp;It may also be a good idea to continue to point people at Michael Hathaway's idea for a garolite sheet + high-temp legs as a significantly better option overall (more heat tolerant, so safer).</p><p>I'd prefer if remixes would retain the original license that permits things like Etsy printing and selling of copies of this thing with competition to keep the price of each print down, but that's entirely up to the creator of each remix. &nbsp;I don't intend to print and sell copies of this remix or my original design, but if you want to, please do; that way fewer people get their spools deformed / semi-melted; yay.</p><p>&nbsp;</p>