Thank you for all these tests Igor, you have no idea how helpful they are when choosing materials. PETG-CF is probably my favorite material for functional parts.
11:37 I think the CF layer adhesion is increased due to the .6 nozzle at the same layer height (.2 i supoose). So i think its not the material. But i hope i am wrong.😊 Altough it definitley shows, this CF material does not have that notorious weak LA like most.
This is the better comparison (according to others too), I was asking around earlier. PETG (and Pro) you would print with 0.4mm and CF with 0.6. So this is the comparison I was also curious about.
@@MyTechFunOh, I strongly disagree. All can be printed in 0.4 and all can be printed in 0.6, so use the same nozzle, because comparisons between multiple simultaneously changed variables are nonsensical. Was it the steel vs brass? Was it the bigger nozzle diameter? Was it the lower speed? Who knows, because you changed fiftyeleven things at once! Sure, people print different things with different setups, but that's because they have different goals. E.g., if you don't have a strong material which requires a low flow rate, but still want stronger layer adhesion, then you're still gonna print your other filament at lower speed. So you don't compare filament properties based on what each one is usually used for (i.e., settings you usually print it with), but for a particular use. At least when testing functional results. If you want to compare across nozzles, then print all with both. Then we at least get a little bit of sanity in the results.
@@marcus3d In this case, I would like to see that comparison too, I hope somebody will do it. Eh, it is hard to explain, but somehow if I am not curious about it, I don't have a motivation to repeat this testing, not worth for 2-3000 views :-( I hope you understand me.. YT don't suggest my videos, not even to my 50k subscribers. (and 0.6mm was hardened steel, 0.4 brass)
@@MyTechFun Yeah, totally understandable that you wouldn't want to reproduce it once it's done. But in future tests maybe minimize the number of variables related to the target feature. It might be good to ask viewers what they want, but keep in mind that most aren't familiar with principles of testing or even engineering in general. It sounds harsh, but most people don't know what they want (me included). They think they know, but often that's because of an ignorance of the subject matter.
You are touching on something counter-intuitive and often misunderstood in the field including many 3d printing veterans, which is that PETG oftentimes isn't impact resistant as strong PLAs. Unfortunately valuable insights like this are scattered across many videos and most viewers probably didn't get it. May I suggest pointing this out explicitly in your new video with the many datapoints you collected?
Downloading to watch later! I've been using a ton of Flashforge PETG Pro in Burnt Titanium, and I've found it to be super easy to print (and machinable!). I'm curious how it performs objectively. Edit: I've been printing mine with 0% fan. Long bridges are aesthetically garbage, but I'm currently printing functional parts, and I've found generally that using _any_ fan hurts strength (not just with this specific PETG). Overhangs are still coming out great. Printing at 235, 70 on the bed, 0.16mm layers, 0.4 mm nozzle with 0.6mm default extrusion width (0.44mm for external perimeters and top solid infill).
I would like to see pet-cf as well. I have heard that the G in petg-cf really weakens it and makes it deform at lower temperatures so it would be interesting to see the impact. Also, would be neat to see results with it annealed as usually annealing is hard to do without distorting the print but I have seen anecdotal reports that pet-cf anneals much easier due to the cf preventing warping.
I recently bought VoxlePLA PETG+ (white). It is the whitest PETG I’ve seen, so it must be loaded with TiO2. It printed miserably using my generic PETG profiles till I looked it up on their site, and it turns out it needs 270C temperature to print ! This is much higher than any other PETG I’ve used. Is this a tell of higher quality or temperature performance for the finished prints, is it just because of it having less glycol or is it a tell of a poor raw material quality ?
For PETG how's the dimensional accuracy? If you have the Flashforge ASA & ABS can you make a comparison based on dimension accuracy? I need to make some cases and PETG was my go to material, but on your PETG videos Impact resistance is lower compared to PLA
