12/17/2023 0 Comments Print from prusa slicer![]() ![]() PrusaSlicer 2.7.0-alpha1 introduced the binary G-code format.When you first run it, it will search for all configurations produced by alpha or beta versions and offer to create a copy of the latest one. The release candidate saves its profiles into regular PrusaSlicer configuration directory. Read the change log of 2.7.0-alpha1 and 2.7.0-beta1 for complete list of changes with respect to 2.6.1. It mostly fixes bugs found in the 2.7.0-beta1. It is likely that these chemistries depart the base material much slower than water molecules, but I hope to find a sweet-spot where the moisture is sufficiently removed without jeopardizing any of the preferred properties of PETG.This is the first release candidate of PrusaSlicer 2.7.0. ![]() Under the influence of high vacuum, the filament and the spool also outgas unpolymerized monomers, plasticizers, stabilizers and other additives. Being very pleased that this approach gets the very best that I could wish to expect from PETG, I wanted to spread the word.įor myself, I have only begun to research this method.Outgassing of the moisture is not the only thing that being removed from the plastics that are inside the chamber. The material's properties are so much better than PLA for the parts I build, that I wanted to determine how to minimize or eliminate these issues. When I first switched from PLA to PETG, I suffered from stringing and oozing, just like so many others have. I wholeheartedly support the perspective that storage of filament in a moderately high vacuum is a more extreme solution than most folks would employ. Now at the end summer things are at their worst as air is rather warm and it is raining. Here the air is dry during winter and I can get by for a long time without needing to dry the filament. So for now I settle on my slightly modified food dehydrator. Those pumps aren't necessarily expensive and I think you estimation for storage per roll is about right. I could use vacuum pump in another hobby of mine, but as I don't have the space I need for that kind of activity I haven't gotten one. If I had the space for this hobby, then perhaps. No doubt vacuum chamber works, but for a hobbyist like me that will be too much. I have planned on shopping some plastic storage bags where you put small desiccant bag with the roll and pump air out of it. Additional costs are now somewhere close to 100€, had to buy IPA, IKEA lack tables, acrylic for walls, and a food dehydrator to occasionally dry up the filament roll in use. I bought Prusa Mini to have an affordable 3D printer. Quality comes from attending to the details, and using the right tools. Additional expense comes from a 2-stage vacuum pump, micron meter, and expendables (pump oil, vacuum grease, etc.). In practice, each chamber costs about $100 per filament roll storage capacity. 2 of my chambers are based on pressure cookers, and one uses a stainless steel inner pot from an Instant Pot device. 3 days stored at 1000 microns produces PETG that can be out of chamber in a printer for about 2 days without noticeable degradation. I have created a few vacuum chambers in which I store my filament until needed. Using a high vacuum for extended periods of time to dry PET has many advantages in performance, but it is difficult to incorporate in the production flow of most factories.įor us, the 3D printing enthusiasts, we can accomplish storing our filament under high vacuum for meaningful periods of time, but the expense to create a satisfactory vacuum chamber is high. The desiccant is frequently re-charged by heating it at high temperatures. ![]() Industry's cost effective method to dry PET is to use very high temperature air blown into a hopper which is then filtered, cooled, passed over desiccant and then re-heated for another pass. Industry's efforts to remove the moisture that would affect the appearance and properties of their products cannot be overcome by methods generally advocated to our 3D printing community. As evidence of this, look to the polymer industries using pellets. The hygroscopic forces holding water molecules on and in PETG cannot be meaningfully removed with desiccant, gentle heating or soft vacuum techniques. I have been using PETG without any stringing or cosmetic issues for a couple years by confronting the science head-on. ![]()
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