CNC vs 3D printing (ABS, PolyCarbonate, Nylon) - Which one is stronger? Services by PCBWAY
ฝัง
- เผยแพร่เมื่อ 3 มิ.ย. 2024
- Sometimes we need part from ABS, PolyCarbonate (PC) or Nylon (PA or PolyAmide), but which method give us stronger parts? CNC machining or 3D printing? All test objects are manufactured by PCBWAY using their services.
www.pcbway.com/rapid-prototyp...
Results download from: www.mytechfun.com/video/335
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Patreon supporters have access to summary table, so they can easily compare these results to those from earlier videos. / mytechfun
Contents:
0:00 Introduction
0:38 Ordering process
1:24 Price comparison
2:09 Limitations, advantages
3:10 Unboxing
3:49 Test specimens
4:19 Tested materials
5:05 Dimensional accuracy
6:05 Tensile test
6:35 Hook test
7:08 Layer adhesion test
7:37 Bending test
8:26 Creep test
10:03 Impact test
11:34 Temperature test
12:55 Results
15:52 Conclusions
#pcbway #3dprinting #cncmachining - วิทยาศาสตร์และเทคโนโลยี
Your material testings with an engineering background are always a great source for deciding what materials to use. 👍
Thank you, though I think that the nylon formulations between the fdm and cnc are very different, as the temp deformation test shows
My curiosity has been solved. Thank you
It was very interesting for me to see that the cnc nylon performs much better than the 3d printed one (in particoular in the creep test but also others).
Maybe (if possible) it would be worth to try to aneal 3d printed nylon parts 🤔 looks like there could be a lot to gain.
Yes, I have it on my to-do list, but never had time for it.. I got this suggestion several times, so probably it's worth it according to others.
Nylon absorbs water, boil the nylon, stop it getting brittle.
Great comparison!!👍🎉
Great video as always
Impressive test regime as always
Thanks for sharing your expirences with all of us 🙂
Very interesting video and extremely reliable procedure!
These videos are brilliant, thank you. Just what I was after, in regards to if PC will suit my use case.
Thanks a lot, very good tests, as always.
Thank you! Your videos are a treasure to the 3d printing community!
Very useful informations! 👌Thank you very much for this video! ❤️
Well done. TY!
Justo excellent test
THANK YOU!
I love how you made your test setup. Low cost but effective. Nice work and thank you as I’m new to plastics and appreciate this info! Happy New Year! I assume you have a materials science background or at least have worked in test labs?
Thx. On my previous workplace I was working a lot with test labs, they did services for us.
He is also a mechanical engineer.
@@MyTechFun no thank you sir!
What you think about 3DP annealing treatment ? Maybe it make a difference
Thanks
Thank you! I am glad that you find the video useful! I learned from it a lot too.
Can you please do a wear test between different PA materials ? Let's say gears that come in contact with hardened steel chains? Or something similar?
Exactly what I am working on currently. Preparing a test setup for this.
Thank you very much. You are GREAT. Please involve FDM printed parts too!!! Your work and tests are very important to us !@@MyTechFun
Did you measure the mass of the parts? 3D printed parts have voids which make them lighter than solid CNC parts. Strength, toughness and thermal resistance scale with mass. If you rescale the results by mass, I expect the 3D printed parts to be closer on all metrics, in which case you can compensate for missing strength by adding mass/upscaling the part. Except if the dimensional constraints are rigid and you can't upscale.
Oh, no I didn't, but good idea. Only it is too late now for these parts, but I will keep this in my mind next time with similar videos. (density is different for these materials, but yes, same materials would be good to compare with each other CNC vs 3DP)
@@MyTechFun Well you can still do it with the pieces of the parts. It won't vary much from the new parts. I think it's pretty valuable information.
@@edufonseca5718I measured two test object (for creep and bending test). It is added to download table on my website. Link in desc. CNC parts are 5-10% heavier.
Thank you for this very interesting and informative test! It is great to know how these manufacturing processes compare to each other! 👍
Can I suggest to try out 3D printing with the settings outlined in the CNC-kitchen video about transparent FDM prints. As mentioned in that video, those settings might give better significantly layer adhesion. Although those prints take a long time, if they provide much better layer adhesion, it might still prove a better alternative to remelting prints in salt for example.
Were both Nylons PA12? How long after printing (or receipt) did you wait before starting the tests?
Both PA12, I got them approx dec 20, but since I need 5 days to be home in a row (on christmas I was visiting my parents), I started with testing on dec 30.
@@MyTechFun Nice. I would call that acclimated, especially because they are thin parts, and PA12 absorbs less moisture than PA6.
I would love it if you could perform a pure torque test to see when heat set inserts strip out of 3D printed parts and compare it to square and hex nuts. We have data for heat set insert performance in tension and combined loading with Thomas Sanladerer’s most recent tests, but lack a pure torque test
He did a pull out test 3 years ago on heat insert nut but did not do a torque test.
I am thinking to repeat similar test with included hex nuts with some groove. You can see its picture here: www.printables.com/model/273615-mintion-beagle-camera-holder (for this specific 1/4x20 thread I don't have threaded insert, only regular hex nut, but it works good). But I think the pulling force is more important here, that will be the first faliure, not the shear torque (except if the nut or insert is from the other side of the bolt)
Interesting but it's looks like pcbway use really differents polymers for CNC and for 3d printing.
It's is the only way, I explain the difference between 3d printed and CNC parts in the oven.
It is crucial to know at what temperature, extrusion width, and layer height the prints were made. For example, if you use a 0.4mm nozzle, a specimen printed in ABS with a 0.55mm extrusion width, 0.2mm layer height, and an enclosure temperature of 65°C will be 30% stronger than the same specimen printed with a 0.45mm extrusion width, 0.3mm layer height, and a 45°C enclosure temperature.
Why do you infere that a larger extrusion width enhances the part strength? At the same total wall thickness, of course.
@@KToMmi Because that way, the filament is pushed forcefully against the bottom layer, that's the conclusion reached by Stefan
@@Marcos-tj8nk oh wow, that's interesting. I knew about the influence of lower layer heights but no extrusion widths.
@@KToMmi and if you print it with 0.15 layer height would be even better
It also affects how soon the new layer is placed over the last one. (Layer time). It'll be great to know the chamber temperature of the printed parts. It's now well known this affects a lot layer adhesion.
Hi Igor, were those FDM or SLS printed?
ABS and PC with FDM, nylon SLS
He mentioned this within the first 30 seconds of the video lol
@@BobertSands this video was played as "premiere/live" for me. I joined a minute or two late into the "live" stream, and asked during that live stream.
@@MyTechFun thank you Igor. Želim vam srećnu, zdravu i uspešnu novu godinu.
So on the creeping test the 3dp nylon was SLS? Probably that's why it creep the double.