CNC vs 3D printing (ABS, PolyCarbonate, Nylon) - Which one is stronger? Services by PCBWAY

hello welcome to my tech one in this video I have very interesting uh comparison testing where I compare CD printed where to CNC machine parts and I'll try to use here the same materials which are ABS polycarbonate and nylon the pa2 the ABS and polycarbonate parts are printed with fdm technology and Nyon with SLS all test objects are made by PCB using their 3D printing and CNC Machining services but this is not a sponsored video I got these test objects for free but I'm not paid anything about this the ordering process is very simple first we have to create an account and then upload the files choose the materials and Technology doing some other parameters now there is a big difference here between the file types for CD printing we can upload even the very popular STL files for CNC Machining we have to upload step files here you can see an example how can you export the step files from Fusion 360 and after this um but some estimate is automatic something is done manually but uh somebody will check if that is that part printable or CNC machinable and uh we will get some estimated price and after this we can choose if we want to place the order or the price is too much or something like that now the price I can talk about the prices for these test objects which are quite small parts and very easy for CD Printing and also for CNC Machining now parts for CNC Machining is approximately 2.3 times bigger compared to C printed Parts if you compare the CNC machine and parts it is very similar for all three materials because basically the tool head have to do the same pet in this case uh if we compare the C printed Parts price in this case the ABS would be the cheapest and then approximately 1.6 times bigger is the polycarbonate and nylon don't forget the nailon is for the SLS printing but it was very equal to polycarbonate fdm printing there are some limitation of course in both technology basically uh for example we cannot create a Bene with CNC Machining even if we have a five AIS tool head even then that tool cannot go inside the cabin of the Beni for example I believe that printing has some limitations in the size usually those Milling machines can be much bigger compared to the printers what are some advantages then of the CNC me link especially with the smaller parts but I think that first of all we don't have that weakness along the Z axis you know the layer atas weakness uh then I believe that the accuracy should be better with the CNC Machining because we don't have that shrinking when we do with the CD printing especially for these three materials so I believe the dimensional accuracy is better for CNC part and I believe that uh it can be even much bigger and faster especially with the bigger pass imagine if you have something this size how long would it take for CD Printing and with CNC Machining especially with the softer materials it can cut uh that material much faster let's see what's in the box these are all the test objects and the packaging is really great so they are protected during the shipping these labels and numbers are very important because they will be very similar so I have to unbox them and place them in this separate boxes which are labeled and in this packaging some gift was included but I think by default this is not always included if you place an order so you have to place this separately in your shopping cart I checked the list every test object is here and now it is separated so I will not mix them they're marked let me show you first my test specimens this one is for the bending test ISO impact test and this one is for the test the temperature test this is for the T side test smallest cross are is 4x4 mm this is that hook test and this one is for the layer but of course I have this only for CD printed Parts the smallest crary is also 4x4 mm and now let me show you the material so this is the CD printed R this is the CNC machine one and uh this uh 3D printing is quite good I cannot even see the layers Noe front foot colors is a little bit different this is completely white and this is light beige color polycarbonate C the printed is in white color and the CNC machine is in transparent color really great transparency we have with this material and the nylon is in Black in both cases but I can recognize them because the CNC machine is more shiny compared to the SLS 3D printed nylon and now let me show you the dimensional accuracy so this is a 3D printed row and with these materials we probably have some shrinking so each of them will be a little bit below 80 mm 7982 7971 7966 and now CNC machine parts 80.7 80.5 and 80 0 so really great dimensional accuracy we have with the CNC machine parts I also measured these hooks uh but off camera let me show you just one measuring in X and Y Direction I noticed the CNC parts are really accurate but in Z Direction there is some inaccuracy but you can see the summary table now on the screen it's time to start the mechanical testing this is a 10y or pulling test ABS parts and here the CNC machine parts was a little bit stronger compared to the 3D printed in case of polycarbonate the strength was very similar and we n part the CNC machine was almost two times stronger compared to the SED and they all broke properly on the smallest cross area of 4x4 mm and this is that hook test side by side the ABS parts and pay attention in all three cases on CSM machine parts you can see some deformation before the brake the braking load was very similar in this case and this is a Nyon and again very similar Blake load in this case too and as I mentioned on CSC parts we can see first some deformation before the break and now the layer at test but of course only with CD printed Parts I'm cutting this bridge ABS Parts the average layer 35 kg which is great actually for the ABS but polycarbonat was even stronger very impressive 60 kg brake load and nilon even stronger don't forget this is SLS printed 76 and of course they all broke properly on smaller cross area three point bending test here you can see all load placed but I we place it one by one and I we measure the deformation after 130 and 60 seconds ABS Parts with different loads this is speed up with time lapse I think 25 times this is a polycarbonate test object and this is part from the naon and after this test I couldn't see any visual deformation on these test objects they still look very straight the crep test the deformation under the constant load which will be 1 25 kg and I will measure this distance between the two reference surfaces in next 5 days from my earlier testings I know that the Nyon don't perform good in this kind of crep test that's why you don't want to build I know vum parts from the Nao for example but I'm very curious is this the case with the CNC machine part two I'm locking the position for more accurate measuring 16 .14 I will skip the measuring footage here but you can see the measur values during I'm placing the load no surprises here so far on initial deformation we have the biggest deformation on two nailon parts and the smallest are on the polycarbonate it's New Year here so happy New Year after 1 and a half days no surprises here quite a lot of creeping I can see on two naon parts and very minimal deformation on the rest four test objects we will see after 5 days so let's jump in the time this is the last day of the testing a lot of deformation on passs from the nylon and with these four very minimal additional deformation and now let's remove the load and after approximately 5 minutes almost no deformation on these four parts and quite a big permanent deformation on two pass from the Nyon and now the isot impact test with this half kilog hammer and these are not original not test objects because here I have a 2x2 mm slot because I want them to be equal on CD printed and CNC machine parts and I'm not really sure but I have the feeling that some of these test objects will not even break under this half kilogram hammer each of them perform great in this ISO impact test they are very tough material compared to the pla or PG the best was the CNC machine polycarbonate which didn't even break but let's analyze the pictures this is the scale this is the zero position of the hammer and this is the after breaking CD printed abs and this is CNC machine abs which is stuer material and then this is CD printed polycarbonate and this is CNC machine polycarbonate which didn't break in this test this is CD printed naon and this is CNC machine Nyon and if I measure everything from the zero position I will get these distances which I can use in this equation of course in meters to calculate the braking energy overall all CSC machine parts are are stronger tougher compared to the S printed materials and now my temperature test and I wanted to record the temperature of the first deformation and probably the first one who will start to deform is the ABS then polycarbonate and then the nylon only question is that if there will be any significant differen between CD printed and CNC machine parts the first deformation I noticed on CD printed ABS part and next one was ABS CNC machine part and then polycarbonat C printed and then we have a big jump the next one will be the CNC machine polycarbonat but only approximately at 167° C and then see the printed naon and then I sto the experiment on 217° C and still no def on CNC machine nylon and I'm curious about this nylon H it is still completely hard 270° C interesting on the C printed nilon stick to this silicone pad I think the winner is quite obvious and now I have to ventilate the OV and the room and then summarize the result and uh I we start with the cripping so these are measured values but what we need is difference between two days and that's what we can see on this graph and here we can see that c the prit Nyon was the worse more than 2 mm of creeping deforming even in the fifth day so that's quite a lot the second worse was a CNC machine nilon but significantly better compared to the C imped version and actually the best in this test was CNC machine polycarbonate uh no creeping even on the first day on 10 side test if you compare these two manufacturing methods to each other abs and polycarbon were very similar to each other but CNC machine naon was two times stronger compared to S imp printed version now the layer test and I have this only with the CD printed Parts all three values are very impressive actually but look at this on a nylon basically we don't have the weakness in the layer adhesion these two values are very similar of course don't forget this is printed with SLS technology on hook test uh interesting that these materials perform very similar to each other between material comparison the polycarbonate was the best but it was interesting to notice that on all CNC machine parts we can see some bending before the break this can be use for as a warning before the failure on three point bending test uh this is the deformation after 30 seconds under these loads and smaller values are better so in this test actually the C PR naon was the worst and interesting to notice that ABS part on smaller Road it perform very similar to other materials but under 10 kg on higher load uh it deformed more but maybe this graph is more interesting where we can see the deformations under these loads after 130 and 60 seconds and here we can see again that Nyon was quite weak in this test a lot of creeping even almost on the 1.25 kg and here we can see that uh C pred abs part so it perform very similar at the beginning on Lower loads like other materials but on 10 kg which is a little bit higher load uh we can even see some creeping on the on this deformation on ISO impact test in all three cases the CNC machine parts perform much better compared to the CD printed versions and don't forget this polycarbon didn't even break in this test and on a temperature test this is very interesting uh coincident that this is almost linear but uh as I predicted the ABS part start with the the form first and then polycarbonate and the best in this temperature test is actually the Nyon and in all three cases the CNC machine parts was better compared to the cuted versions and don't forget that you can download this Excel table from my tech.com website and here you have the sheet for the price and for the dimensions even if you don't need this kind of services at this moment it is always good to know the possibilities and and for example few months ago I needed some test specimen holders from metal and actually here I used the pcbb meta CNC Machining services and with this video I hope I could help you a little bit to choose the correct material if you need it from this plastic which I listed in this video if you had some additional experience you know let me few lines in the comment section thank you for watching and happy designing and ordering

Channel: My Tech Fun

Views: 5,420

Keywords: pcbway, cnc, 3d printing, cnc machining

Id: wIsdEnHRr4g

Length: 16min 30sec (990 seconds)

Published: Sun Jan 07 2024