Please don't stop doing the shear tests! They are the most useful test!
@MyTechFun
7 сағат бұрын
That was partly a joke, but it convinced me, to buy 500 kg tensile testing machine, not 200 kg (what was my original idea)
@romainmuller-rs5yi
6 сағат бұрын
Maybe you should try to make a diy universal test machine. This will take no effort to test the material, remove the speed variable and you could even graph the strain stress curve (giving you a lot of usefull information) if you measure the strain.@@MyTechFun
@ImolaS3
5 сағат бұрын
Perfect!! I am a mechanical engineer academic too and just found your site after a search for PPA-CF. I love your approach and superb results presentation. New subscriber!
@awildridehome9469
3 сағат бұрын
15:20 Beyond being an excellent content creator and a very thorough tester, you are also a man of true culture
@GeekDetour
2 сағат бұрын
The girl is SO strong she even has 6 FINGERS - go back at 15:20 and check it out 🤣 ...Now, thinking of it, maybe that's not a problem at all 🤔
@awildridehome9469
2 сағат бұрын
@@GeekDetour I don’t discriminate based on the number of fingers, only on the strength of the muscles and the ability to crush a watermelon between ones thighs.
@saturnmedia1
6 сағат бұрын
Yes! Please test the filaments in Qidi machines!!! The heated chamber is great on the Q1, but the plus4 is better. Just be aware of the current issue of the heater being blocked if you lower the build plate all the way while printing!
@Lexal-e2h
4 сағат бұрын
Oh, and I really like your testing of a material vs many brands. Very useful in guiding my purchase decisions.
@MyTechFun
4 сағат бұрын
I am glad. There will be 2 more. 10x transparent PETG and 8x black ABS. YESSSS, same colors this time :-)
@FunctionalPrintFriday
2 сағат бұрын
I just tested a plus 4, and was genuinely impressed. Excited to see what you think of it.
@crashingsux
4 минут бұрын
The comparison to PET-CF is exactly what I was hoping for. Thank you! Another very useful video.
@TheElectronicDilettante
5 сағат бұрын
You should try printing at 320 and anneal the PPA-CF. Then retest. If it ever strikes you, give the PPS-CF from Fiberon(polymaker) a go and compare with the PPA-CF. It’s another ridiculously expensive engineering filament but amazing results, comparable to those you had with the Bambú Lab material. Thanks for the video!!
@mikejackson9585
3 сағат бұрын
CLOUGH 42 ran into similar layer adhesion issues with his tests, and Bambu pinned it down to failing to COMPLETELY turn off cooling. Made a huge difference for him. Give it a shot.
@MyTechFun
2 сағат бұрын
I saw the video. I will have another testing with PPA, when I don't use default settings any more (as mentioned in the video, 310°C etc.). There may be small problem with overhangs, if I turn off the part cooling (watch that Benchy in this vid.) But I will give it a try, when I finish the Qidi Plus 4 review.
@TheDarkrider551
6 сағат бұрын
What was the chamber temp when printing the ppacf? i saw from other test that it needs to be at lest 50C for it to get close its optimal strength for the z direction and fans completely off, from clough42 newest video this was able to bring the strength in the z direction up by about 40%
@adeo
6 сағат бұрын
Btw, the temperature resistance for the PET-CF is *after annealing*, if you don't anneal it will fail much earlier exactly as you showed. The same applies to PPA too, but due to the even higher resistance it's less noticeable
@MyTechFun
4 сағат бұрын
Oh, on time. Now I have to reprint and anneal a few objects 😂
@adeo
3 сағат бұрын
@@MyTechFun for PET you just chuck it at 80°, wait two hours, ramp to 120°, then hold there depending on part thickness. If you also do a slow cooldown the parts will warp less
@adeo
3 сағат бұрын
It would be cool to see an "Annealed vs as printed" video, with the typical semicrystalline polymers like PET, PA6, PA12, PPA, PLA, and most importantly PPS
@802Garage
3 сағат бұрын
I made the same note. Was reading the Polymaker Fiberon PET-CF TDS the other day and the pre and post printing steps seemed very critical for maximum performance.
@thegrafxguy1
3 сағат бұрын
great video as always man. super informative, love your stuff!
@Lexal-e2h
4 сағат бұрын
Your testing is greatly appreciated. However, what is missing on youtube is informed mechanical design guidance regarding 1) how to apply these test results to the selection of the right material for fabrication of specific printed parts 2) when should a part be split and made in 2 different materials and 3) how to add common features to mechanical objects to improve the design (fillets on cantilevers, etc). And then having this guidance tested in comparison of with and without these added features. The 3d printing community would benefit from some Mech Eng guidance. No one else is doing this and it is sorely needed.
@802Garage
3 сағат бұрын
Slant 3D does some, though they aren't perfect. Functional Print Friday is pretty solid. NeedItMakeIt has def done some interesting testing and guidance on 3D printing for functional uses. Overall agree with you, just giving some suggestions.
@RaRa-xg7le
4 сағат бұрын
So awesome was waiting for this video! Thank you
@Khoomn
5 сағат бұрын
Great video. I just bought 1kg of PET-CF, 1kg of PA6-CF, and 0.75kg of PPA-CF which was a lot and I know which ones to use now. For the layer adhesion, other than the high nozzle temp, on the Qidi Plus 4 I would set the chamber temp to 65c as well. Also at 7:41 you can see gaps in the lines which would also cause issues as there is missing material contact.
@airatooo
6 сағат бұрын
FYI Qidi and Siraya Tech both have PPA CF filaments now, and way cheaper than Bambu. would be nice to compare them all. Thank you 🙌
@riba2233
6 сағат бұрын
also raise3D, it's just more expensive
@jamesm3268
20 минут бұрын
Raise3d don't deserve any money they're horrible. @@riba2233
@StoneCut
6 сағат бұрын
Great test, as always. Thank you!
@MrHeHim
5 сағат бұрын
I do 1-1.5mm³s flow (Custom-Made Volcano heater block and MicroSwiss CM2 hybrid nozzle) at 0.12mm layer height for mold like parts. 1-1 ratio, remove overlapping, and sometimes go back to Simplify3D as their algorithm narrows extrusion to fill gaps rather than trying to inject into them. Meaning, when I break them to test the print they don't break on the layer lines but rather as if it was molded. At that speed you can avoid part cooling almost completely, as it's terrible for tempering the plastic and layer adhesion Amazing content science man! 🫡
@freedomofmotion
4 сағат бұрын
I've got the plus4 its a very good printer with a few quirks. The default profiles I find tend to under extrude. Sometimes more flow is needed other times they've been too conservative with temperature. For example ASA had gaps in first layer. After changing bed temperature to 100c and increasing initial layer temperature by 5 c and chamber temperature to 65c it prints exceptionally well. With PLA just increasing flow ratio to 1.00 was sufficient. Materials with abrasives are the worst thiugh so the nozzle is very restrictive. Wood pla needs 1.1 flow ratio. PETG CF needed to increase to 0.98-0.99 to print well.
@riba2233
6 сағат бұрын
hmm really interesting, clough42 got higer tensile XY numbers, like almost 60% higher. I think this will be interesting to test in the new QIDI machine too see if there is any difference. BTW can't wait for PET-CF results :)
@Eric_Wolfe-Schulte
4 сағат бұрын
James printed with a 60+ degree chamber and I think that makes a difference!
@riba2233
4 сағат бұрын
@@Eric_Wolfe-Schulte not for XY. higher temp chamber only improved Z tensile slightly, and turning off cooling fan improved it by a lot
@guantanamobae530
7 сағат бұрын
I'd love to see this printed at 320C. I'd assume it will have better layer adhesion, but I wonder how other properties will change. That could be an interesting test - printing the same filaments at the minimum, midpoint, and maximum temperatures to measure how it changes the properties of the printed parts.
@drkzilla
6 сағат бұрын
Wow this is an impressive material. The temperature range is super impressive
@ChrumkavySuchar
10 сағат бұрын
Looking forward to this video. I don't even know, why, I will not probably buy it never ever. But it is very interesting that you can at home print such engineering materials nowadays.
@802Garage
3 сағат бұрын
Great testing! I'd bet the PET-CF needs annealing to reach its best specs, though I'm not sure if you did that or not. Definitely looking forward to your Plus4 review! Mine has been fantastic so far and right now I'm printing special PP-GF30 filament at 290C with beautiful results. Only difficulty is build surface, which isn't on Qidi since PP doesn't like top stick to anything except PP.
@MyTechFun
2 сағат бұрын
Several comments mentioned the annealing, but why is it not mentioned in the product page on Bambu Store website?
@802Garage
2 сағат бұрын
@@MyTechFun Interesting. It isn't mentioned on the product page at all. A bit misleading to give the specs without the caveat. I was only aware because I just read the Polymaker Fiberon PET-CF17 TDS and it highly encouraged annealing. They at least have a note on it at the bottom of their product page. If you download the Bambu Lab TDS linked near the bottom of the page for their PET-CF, annealing is only mentioned in one spot. The note under Specimen Test reads "All the specimens were printed at the following settings: Nozzle Temperature = 270 °C, Printing Speed = 100 mm/s, Bed Temperature = 80 °C, Infill Density = 100%. All the specimens were annealed and dried at 80 °C for 12 h before testing. And the suggested annealing temperature of models printed with Bambu PET-CF is 80 to 140 °C, and the time is 6 to 12 hours. The annealing effect depends on the annealing temperature, time and the model itself: size, structure, infill and other printing settings; some prints may deform and warp after annealing. When drying the filament and annealing the prints, it‘s required to use an oven that has big enough inside volume and can provides even temperature distribution, such as a blast drying oven (forced-air drying oven), and the filament and prints need to be away from the heater, and a micro-wave oven or kitchen oven is not compatible, otherwise the filament and prints can get damaged."
@Kai-P
6 сағат бұрын
Thank you, looking forward to more tests with other temperatures. Would also really welcome you testing annealing with this material. I have like 10 engineering materials (mostly nylon-cf's) and this so far is my favorite by far, so strong and so easy to print as well. Only one coming close might be add:north PC-CF, hope you'll get to test that some day. Probably even stronger, but harder to print.
@yakostudios5405
5 сағат бұрын
Great video, Professor, as always! I'm really curious about these new Bambu filaments. I'm glad you're testing PET-CF-will PAHT-CF be getting a test soon as well? The higher nozzle temperature should definitely impact layer adhesion, but the chamber temperature plays a crucial role too.
@jamieclarke321
5 сағат бұрын
The only three factors that really matter at all are layer adhesion, temperature resistance and creep.
@Lumi_nance
53 минут бұрын
No
@baderalafghani4564
6 сағат бұрын
The pet has to be annealed to reach 200C
@motofreak75
Сағат бұрын
Great video as always, another person was able to get the exact same Z test strength results as you, but was able to increase it to 59-62 afterwards by turning off "slow printing down for better layer cooling" and chambers temps were in the mid 50's to 60C I can't test this myself until my plus4 gets here in a few days. My X1C motors likes to skip steps when the chamber temps is above 60C.
@donaldslayton2769
6 сағат бұрын
The shear tests are amazing. It would be a shame to miss out on them
@notyouraveragegoldenpotato
7 сағат бұрын
You should try Taulman alloy 910 (nylon alloy)
@MyTechFun
6 сағат бұрын
I already contacted the company, their words: "we are limiting sponsorships to US-based affiliates only". And they didn't changed their mind, even when I told them, that most of my viewers are from US. I am just not curious enough to buy it myself (I can't afford it with so low number of views)
@802Garage
3 сағат бұрын
@@MyTechFun That's super weird. May be a tax thing.
@GhVost
4 сағат бұрын
Use molecular sieves as a desiccant. It is way better than silica gel absorbing the moisture. Vacuum is only helpful for you to make sure that there is no leak in your gaskets.
@JiajuChen
3 сағат бұрын
Did you see Clough42's approach to reach way better layer adhesion? What do you think?
@MyTechFun
2 сағат бұрын
I saw the video. I will have another testing with PPA, when I don't use default settings any more (as mentioned in the video, 310°C etc.). There may be small problem with overhangs, if I turn off the part cooling (watch that Benchy in this vid.) But I will give it a try, when I finish the Qidi Plus 4 review.
@lolzlarkin3059
4 сағат бұрын
I'd be interested to see if you can improve the layer adhesion with an actively heated chamber. Considering the new bambu machine will likely have it, it would be good to know if it is worth it.
@HeathFoster1
38 минут бұрын
What's the difference between this and polymaker PPA-CF?
@aelsi1337
5 сағат бұрын
One word: wow!
@berlinberlin4246
4 сағат бұрын
Have you printed is without any cooling? And also disabled overhang/ bridge cooling?
@hanswurstusbrachialus5213
Сағат бұрын
Expensive in this case means its half the price of the competitors. Would be interesting to compare it to them.
@3D_Printing
2 сағат бұрын
"ePLA" is said to be very strong and higher temperatures coping than PETG
@ScientificGlassblowing
4 сағат бұрын
That is one expensive Benchy!
@tinkerman-q
4 сағат бұрын
Wonder if you have ever tried PPS. Would love to see it
@MyTechFun
3 сағат бұрын
I will soon. 3 (Bambu, Polymaker and Qidi)
@chatroux399
4 минут бұрын
Please try unfilled PPA from qidi. I m pretty sur the CF is killing the layer adhesion.
@Zeusbeer
2 сағат бұрын
I see that you are just using the minimum area in the tensile test. Could you share the geometry of the tensile test sample so I can try to get a number for the stress concentration factor? Next to this you might also need to correct for the geometry of the layers. I am really curious how Bambu got their 208 MPa number.
@MyTechFun
Сағат бұрын
My test objects: www.printables.com/model/465670-mytechfun-test-objects (this is "no hole" version)
@riseandshinejp
5 сағат бұрын
You need to set up a discord to contain all the data and build a community.
@AndrewAHayes
5 сағат бұрын
Too expensive for me, unless I was making a replacement part that was more expensive to purchase.
@blackpete
2 сағат бұрын
I'd love to print that, but, that stuff is pricy! 😮
@alycapo3391
2 сағат бұрын
To get the strongest results it has to have no fan
@Rajonex
5 сағат бұрын
Igor, I found quite interesting video about composite of filaments. It's more and more popular to have idex or toolchanger in Open Source society. I would be very interested in some tests performed by you. There are some videos (e.g. kzitem.info/news/bejne/rH6iqnmfepaciHo) but none of these available on youtube are with such professional and engineering approach like yours. Btw if anyone would be also interested in such video, please like this comment, that Igor will notice it
@88rhoracio
10 сағат бұрын
Cost? Layer adhesion?
@MyTechFun
10 сағат бұрын
Bingo
@TheDarkrider551
6 сағат бұрын
$150-160usd and and to improve layer adhesion needs a heated chamber to ~50c and NO FANS for cooling
@nikoivan2580
7 сағат бұрын
Me laughing in injection molding with a Sumitomo Demag machine in my basement lol
@dymel_88
6 сағат бұрын
how much would it cost to make one benchy @110% size?
@nikoivan2580
6 сағат бұрын
@@dymel_88 about € 20k for the tool and € 0,00245 for the plastic ...
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