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Butter Pockets Prints
United States
Приєднався 30 бер 2023
I'm Jakob (AKA Butter Pockets) and I'm creating videos on 3D printing and any other kind of tinkering I can get my hands on. You'll see the latest 3D printers, tutorials on CAD/Fusion360, and other fun projects so hopefully you (and I) can learn and make new stuff!
linktr.ee/butterpockets
(So you know how waffles have little holes and when you spread butter on it kinda fills the holes? ... well those are butter pockets!)
linktr.ee/butterpockets
(So you know how waffles have little holes and when you spread butter on it kinda fills the holes? ... well those are butter pockets!)
Qidi Plus 4 Review: Their Best Yet, With One Issue
Check out the Plsu 4 with my affiliate link: qidi3d.com/products/plus4-3d-printer?sca_ref=4781419.pDftAwEV9s
Articulated dragon print: www.printables.com/model/835659-water-dragon-articulated-dragon
Dummy13: www.printables.com/model/981111-dummy-13-version-10
Gengar print: www.printables.com/model/821828-gengar-flexi-articulated-pokemon-print-in-place-no
00:00 Intro
00:47 Power draw
01:36 Features
02:43 PLA test prints
05:26 Overhang performance
06:19 VFAs oh my
08:04 ABS test prints
08:46 Wrap up
10:56 Outro
Articulated dragon print: www.printables.com/model/835659-water-dragon-articulated-dragon
Dummy13: www.printables.com/model/981111-dummy-13-version-10
Gengar print: www.printables.com/model/821828-gengar-flexi-articulated-pokemon-print-in-place-no
00:00 Intro
00:47 Power draw
01:36 Features
02:43 PLA test prints
05:26 Overhang performance
06:19 VFAs oh my
08:04 ABS test prints
08:46 Wrap up
10:56 Outro
Переглядів: 4 582
Відео
Potential Safety Hazard with Qidi Plus 4 3D Printer
Переглядів 1,6 тис.2 місяці тому
Watch Modbot’s video for more info: ua-cam.com/video/JARwXIiTbxM/v-deo.htmlsi=ozASZnGOj5bCGorP
Wet Filament Hates This One Easy Trick...
Переглядів 3,3 тис.3 місяці тому
Dryer? I hardly know her Consider using my affiliate link to purchase from Sunlu: www.sunlu.com?sca_ref=6595835.sWA1lDy2Dh 00:00 Intro 01:21 First print 02:29 Testing 05:57 Test Results 06:28 What is cool about this thing? 07:56 Final print results 09:00 Outro
Stop Wasting Filament with the Sunlu Filament Connector!
Переглядів 2,1 тис.5 місяців тому
Consider using my affiliate link to purchase from Sunlu: www.sunlu.com?sca_ref=6595835.sWA1lDy2Dh 00:00 Intro 01:15 Using the device 03:15 Test results 06:27 Final thoughts
Level Your Bed FASTER with Eddy!
Переглядів 15 тис.5 місяців тому
If you are interested in BTT products consider using my referral link, sign up and get 5$ off: refrr.app/wPJ4eTkmmr/115026 All the instructions for Eddy are here: github.com/bigtreetech/Eddy 00:00 Intro 01:09 Updates! 01:39 How it performs 02:34 Hardware install 03:12 Firmware 05:47 Config setup 09:58 Should you buy it? 12:08 Okay, but really, should you?
Formbot Voron 2.4R2 Pro+ Kit Build!
Переглядів 30 тис.7 місяців тому
Turn your dream 3D Printing project into a reality at PCBWay: pcbway.com/g/s49dwT Hope you guys stick it out for this long video. Thanks again to Formbot for hooking me up with a discount. I really like this kit and if you want to build a Voron I think a Formbot kit is an easy affordable choice. This guide should get you through it but feel free to drop some questions in the comments! Affiliate...
Is This the Best 3D Printer for ABS?
Переглядів 6 тис.9 місяців тому
Check out the Q1 Pro here: qidi3d.com/products/q1-pro?sca_ref=4781419.pDftAwEV9s Check out the rest of Qidi's website here: tinyurl.com/3tuzp95p Follow me on Instagram: butterpocketsprints?igsh=MXcwbWFjeHk3Y25xaQ & Check out the cali dragon here: www.printables.com/model/209121-cali-dragon Check out Ace the beaver here: www.thingiverse.com/thing:1801790 Intro: 00:00 Features: 00:1...
Is the Bambu Lab A1 Worth it After the Recall?
Переглядів 18 тис.10 місяців тому
Check out my Instagram: butterpocketsprints Cali-Dragon: www.printables.com/model/209121-cali-dragon Rotating rings fidget toy: www.printables.com/model/7876-rotating-rings-toy Printable scenery: www.printablescenery.com/ 00:00 Intro 00:51 Recall info 01:24 What THIS video is 02:26 Print setup 03:23 Stock print examples 06:11 Tuned print examples 09:24 What is blud yapping about?...
The Best Way to Reduce Filament Waste for Bambu Lab AMS
Переглядів 116 тис.Рік тому
Turn your dream 3D Printing project into a reality at PCBWay: pcbway.com/g/s49dwT Check Leon Fisher Skipper’s Gcode and reduce your poop here: makerworld.com/en/models/91241 Umbreon model here: www.printables.com/model/181163-umbreonpokemon Intro: 00:00 Sponsor Spot: 01:21 How it works: 02:00 How to do it: 05:53 Outro: 08:22
You should be drying your 3D printer filament
Переглядів 1,7 тис.Рік тому
Checkout Fixdry with my affiliate link here: bit.ly/3R8wfxO Remember to use code: BPP10 To save 10% off ALL Fixdry products!
The Qidi X-Plus 3 gets HOT!
Переглядів 5 тис.Рік тому
Check out Qidi Tech with my affiliate link: tinyurl.com/3tuzp95p Clough42 video: ua-cam.com/video/hg7m0t-4h5s/v-deo.html Low-poly Snorlax: www.printables.com/model/318081-low-poly-snorlax Parametric box by me: www.printables.com/model/357288-parametric-stackable-boxes-sbox-redone Into 00:00 Features 01:17 Unboxing and setup 02:13 First prints 04:01 Qidi slicer 04:41 Z-offset 05:45 ASA Prints 06...
How I designed a light bar for the Prusa MK4
Переглядів 951Рік тому
Turn your dream 3D Printing project into a reality at PCBWay: pcbway.com/g/s49dwT PCBWay article on gerber export: www.pcbway.com/helpcenter/technical_support/Generate_Gerber_files_in_Eagle.html PCBWay DRC: www.pcbway.com/pcb_prototype/PCB_Design_Rule_Check.html PCBWay online gerber viewer: www.pcbway.com/project/OnlineGerberViewer.html Find all the files for the project here: drive.google.com/...
Slicer Settings for Beginner 3D Printing
Переглядів 3,3 тис.Рік тому
Prusa's in-depth explanation: help.prusa3d.com/article/first-print-with-prusaslicer_1753 Infill types explained: help.prusa3d.com/article/infill_42 Wall thickness explained:help.prusa3d.com/article/layers-and-perimeters_1748#recommended-thin-wall-thickness Download PrusaSlicer here:www.prusa3d.com/page/prusaslicer_424/ Download BambuStudio here:bambulab.com/en/download/studio Download OrcaSlice...
My Secret to Filament Tuning with Bambu Lab Printers
Переглядів 141 тис.Рік тому
Turn your dream 3D Printing project into a reality at PCBWay: pcbway.com/g/s49dwT Download Orca slicer here: github.com/SoftFever/OrcaSlicer Desiccant holders: www.printables.com/model/65922-silica-gel-spool-container www.printables.com/model/168412-super-fast-silica-gel-desiccant-spool-container-va www.printables.com/model/423765-silica-dry-box-for-bambu-lab-ams-hydra-and-stock-v Food dehydrat...
Bambu Studio and X1C Updates...is Orca Slicer Dead?
Переглядів 39 тис.Рік тому
Check out BambuStudio Github here:github.com/bambulab/BambuStudio/releases/ Orca Slicer Github here: github.com/SoftFever/OrcaSlicer
3D Prints with Magnets, Threaded Inserts, and More!
Переглядів 26 тис.Рік тому
3D Prints with Magnets, Threaded Inserts, and More!
How to Replace the Hotend Assembly on Bambu Lab X1/P1P Printers
Переглядів 2 тис.Рік тому
How to Replace the Hotend Assembly on Bambu Lab X1/P1P Printers
You Don’t Need Supports for 3D Printing
Переглядів 2,2 тис.Рік тому
You Don’t Need Supports for 3D Printing
Manual Filament Tuning on Bambu Lab Printers with Orca Slicer! Pt. 2
Переглядів 58 тис.Рік тому
Manual Filament Tuning on Bambu Lab Printers with Orca Slicer! Pt. 2
Manual Filament Tuning on Bambu Lab Printers with Orca Slicer!
Переглядів 83 тис.Рік тому
Manual Filament Tuning on Bambu Lab Printers with Orca Slicer!
Parametric Design in Fusion 360 for 3D Printing
Переглядів 1,8 тис.Рік тому
Parametric Design in Fusion 360 for 3D Printing
Nice video! But i found the "printed parts" part and document lacking. I cant for the life of me get around what files to print, and just mentioning 18 parts in the document and not even mentioning which files they substitute ? either i´m stupid or very confused :D Please help
These are great examples. You have a great way of explaining how to do these. Exactly what I was looking for.
you save filament AND time! Time is an important aspect since the flushing is pretty slow too. Thanks for the video!
I just recently bought some Kingroon PLA. I find on my P1S (which I still need to tune Z-Axis) that it really comes out great at 195. I have it set to 200 in the profile but it lays down looking dry and scuffed., 205 and it starts to string a little…. 195, each layer is smooth and has a sheen…. Am I wrong? I like to watch too…. Why does that make me feel dirty? LOL
I did al the speed tests and then then the last test is this one..... i looked at it for an hour or so and was just confused.... i saw no difference
Coming from another video you made a year ago I'd just like to say congrats on the weight loss. Looking healthy!
After I did the test and changed the pressure advance to the one I thought was the "sharpest", the first layer of my print had a small gap between the first outer wall line. Not really sure how to properly look at the PA test or what Im doing wrong
I have a dehumidifier box for electronics would this work to dry filament?
I've got 1.9.2.57 Bambu Studio release but there is no trace of this change in "Change Filament G-code..."... ;(
Hello again I had an another question. Not sure how to ask it. But I finally hooked up my printer to my laptop. And printed from the laptop for the first time and was looking at the camera and noticed a lot of shavings and thought I might have added to much glue. So I went to check and the printer was trying to kill its self lol. But really it was carving into the build plate in the areas it was supposed to lay the plastic. I printed something I already printed and came out fairly similar. Then tried the file I sent and printed okay. So I’m not sure what caused it to do that. I’m concerned that I messed up something but not sure how to test it. It took a big gouge out of the build plate so it definitely went through some torture any thoughts?
has anyone discovered a fix to use this method on the P1S? the default gcode for the P1S doesn't match up with that of the PDF, and it gives an error when slicing.
want to see masterchief at full speed on it.
Just ordered one. Wish me luck, lol
We notice, we care, but just when you think you've solved VFAs, they crop up in another print, in another printer, in a new material, and the rabbithole springs endless branches into existence. Like an episode of Sliders.
Activated Alumina for desiccant. Works excellent, you just have to watch it more since no color changing but way stronger desiccant.
I've owned an A1 Mini for 2 months now and have learned SO much in that time. Your video REALLY helped explain things in a way that I could understand. I subscribed for further education!! Thank you for taking the time to make this and share it online. Much appreciated :)
Very helpful video man, thanks!
3d printer enthusiasts hate this one brand : Sunlu. I've wasted more time on Sunlu filament than any other brand. Used to be a brand i'd swear by and recommend I used to love their PLA+ ran probably 30 rolls of it. Now? I'm throwing nearly full spools in the garbage because they have such poor layer adhesion I can't print a circle without crossovers of 30%+. Brand new spools freshly out of the package are covered in filth, cardboard debris, dust, and god knows what else. The White PETG I just opened has visible foreign debris in the filament itself. Not once, in several spots on the roll. Full extrusion widths are crossing over the center of a circle because the layers aren't adhering. If I move my nozzle closer the PETG balls up on the nozzle and I get large deposits that mess up the print. Temperatures and everything have been run on probably 20 different PETG's without issue. The diameter of the filament is between 1.6 and 1.8 over 5 feet. The wrap on the spool is over an inch difference between sides, it was wrapped completely unevenly. Several full spool width crossovers are evident through the winds. I don't think there's actual tangles. But it's as if they started wrapping the right side of the spool then went to the left, without wrapping between. Several spots on the spool like this. Currently printing the same print on a roll of CF-PETG I have had for over a year, that's been on a shelf above a window that's been opened almost all summer in 50-100% humidity, from a different brand, printing flawlessly. If you want to waste time and money on inconsistent filament than Sunlu's the way to go. I certainly wouldn't trust something they make that has any sort of capacity to heat... They can't even make filament....
.0105 is what I would have picked for “sharpest corner”, making one of us very wrong.
I mean, maybe it’s not super clear in the video, but if you focus right on the corner itself you can see it “bulges” out. If you look at just the outside edges they aren’t fully straight leading to a bulge at the tip
Why the hell do you have a section called "hardware install" where you DON'T INSTALL THE HARDWARE?
Because I INSTALLED THE XCARRIAGE. The Eddy install is TWO BOLTS. Why the hell do you need to see me screw in two bolts???
@@ButterPockets Hey now. Which direction do the screws go? What do they go into? Are there nuts? Are there heat inserts?
Thanks! This video and your notes helped so much while building the Formbot kit.
Glad it helped! Thanks a lot for the super!
Always shocking when an experiment does not go anywhere close to how you planned. Thanks for sharing this, I have been looking for a dryer for a bit now but this one seems to be everything I am looking for as well as a great price right now so I ordered one.
In case anyone else checked the comments before watching the whole video and had no freaking idea what "VFA" stood for, it's at 6:20, "vertical fine artifacts".
a tip for anyone , grab the file from bigtechtree and not arbiamt, the wifi settings around there in armbian
One of the reasons stock PLA profiles don't end up with perfect corners and overhangs is that they don't enable the auxiliary fan by default. Just adding a little aux fan can really clean up cooling quality issues. Strange you are getting VFA issues. Most people tend to have very low VFA prints. My experience with the Plus4 is that it produces incredibly accurate and VFA free prints. I am very impressed overall. Belt tension and lubrication along with running ideal speeds are usually best to reduce the VFA, but sometimes there are other issues we haven't been able to fully nail down. Running a VFA tower print may help. Do let us know if you ever figure out your specific issue.
In my experience the aux fan on these printers only hurts because it adds cooling from one side only and not in a very optimal way. But to be fair I didn’t really try it with this printer and I’m actually surprised the default profiles don’t turn it on. At least I don’t think they do (I can’t really remember). And yeah I really did not expect this printer to have these issues and it stinks that it does. I plan to do some more tests and a follow up. I did run a VFA tower (I showed it off in the video). I ran several actually and in multiple materials as well. Hopefully I can solve it because I really do like this printer.
@ButterPockets Def try the aux fan helps tremendously with my PLA prints at higher speeds.
As above comments, please do a follow up video on the VFA issue when you can
The VFA seems to go away the faster you print maybe try that?
Typically other things start to fall apart the faster you print. Also, unless you can run insanely fast accels or only print large flat objects, you won’t run at your fast speeds. Any move change will require the tool head to run slower than the number you put in the slicer. That’s why a lot of those VFAs appear near the corner of the rock face print.
I just traded my K1 max for this thing, absolute piece of shit so far, can’t leave it unattended, woke to a huge ball of molten plastic attached to the print head from an overnight print, wasted at least 2 rolls of pla on failed prints in a week
It sucks to hear - I would post on Reddit or discord somewhere and try to get some help. I’ve left mine running overnight over a dozen times during prep for this video and even just last night and nothing has failed. I would suspect either something is wrong with the printer or user error. Be sure you wash your build plate with soap and hot water.
Yeah they're pretty cool ya know
Does this still apply/work with the current Bambu Studio?
I think this was implemented by Bambu studio I'm not sure tho! I think I read something about it on their reddit
Hey. Dyu have custom profiles for the plus4 or vidz on how to better the default profiles on qidi studio defult settings. Also all the code upgrades and how to do em. Sorry m new to 3d printing n jus got one a month back
I basically showed a profile in the video
Saw that one. Was that all there was to it?Asking about other types of filaments and if there r specific vidz u have for profiles
I don’t really share that kind of stuff on the internet. I have a video titled like “how I tune on Bambu lab printers” which almost all of that is applicable to a Qidi as well. Teaching tech has some good stuff too. Honestly just use default stuff until you see a problem, then try and fix that problem.
Ok,great thanks for the replies. If u do find any soln for the issue in the video, pls do make a vid as will be looking forward to that as mine has the same issue and also I notice more streaking on items I print towards the front (near the door) esp when m printing multiple items so some are placed there.dno if that's only mine too but will do more research. Otherwise it's an amazing printer and really enjoying it. Thanks again
Yeah I plan to make another video if I figure anything out. That’s kind of on the back burner now, but I plan to try some more!
Right now it's $399 and there is an easy to find $30 coupon out there. Free shipping
I use the HULA Damper designed by ThrutheFrame in Thinkiverse, it make it a little better.
Try setting the pressure_advance_smooth_time to 0.05. That seemed to clear up a lot of the pressure advance "bounce" for me, which looked kind of similar to what you were showing off there. I managed to get all artifacts to go away by ensuring the out wall speeds were 170mm/s or higher. For small-print scenarios, I did multiple 1mm advance VFA towers, and for me I found a handful of very particular lower speeds where all the VFA's mostly went away. 56 and 96mm/s speeds in case you were wondering, but your individual printer may vary. I also ended up at 2000mm/s^2 accelerations for outer and inner walls and top surfaces, and used 7500mm/s^2 accelerations for solid/sparse infills. I don't know how I can show you images of my prints now on UA-cam though.
For the pressure advance smooth time I was using 0.04. It’s my understanding that below 5k accels you use 0.04, between 5-10k you use 0.03, and above 10k you use 0.02. I can believe the fast and slow thing tho. People have found the same results on the X1. Go SUPER fast or really slow. I ran some tests with speeds no greater than 40mm/s and accels under 2k and they didn’t go away which really surprised me. I should probably make a discord or something but I’m on there with the username “butterpockets”.
@@ButterPockets I'm over on the Qidi Official Discord Server, mostly hanging out in the Plus4 channel there. You're welcome to come say hello. We have a massive VFA discussion thread there too.
Why can't it be calculated how much can be printed with the filament that will be flushed and cut it in advance, using the filament that would be wasted on the actual print. If the calculation is not precise, which I understand, use 80% of it or so and waste just a fraction before changing the filament color.
I get ya. That would be a great way to do it. I think, if I had to give a reason, that the current way was the most repeatable and reliable method. They went with that and stuck with it. Coupled with the fact that BL didn’t make a custom slicer but just re-used slic3r.
Did you try with the to print with the resonance avoidance of? With my printer it does not seem to make a difference at all. I wonder if it works properly.
Yes I tried that on and off. There’s no way it’s doing anything because it’s only speed based. Unless you did tests to correlate which speed is causing the most vibration, it would be very hard to know. If I remember their default profile and my profiles didn’t even use the speeds within the region of that setting anyway. My guess was the 70-120 default setting for that was either random or it’s because of a holdover from early printing days. ~100mm/s was a weird transition speed between stealthchop and spread cycle.
I am glad to see this video, I thought it was only my printer. It is pretty disappointing though. It is such a great printer, but this ruins it for me. Even at slow speeds they still show up. I saw a design of an adjustable belt tensioner somewhere, maybe that might help.
Yeah I tried not to search around and see if I could do something with my own knowledge. It is very disappointing. There were some other comments of people saying theirs isn’t like that at all. So hopefully it isn’t a problem with every printer.
A1 doesn't have VFA: 1.5mm belt pitch + flat belts on the idle pulleys.
In my experience the A1 does outperform the X1. I haven’t run dedicated VFA tests on it, but usually the default speeds and accels are way too fast. I should run a test tho
@@ButterPockets Or just google, it's known fact that A1 has less VFA and better extrusion. If that X1 was running slower it would show more VFA.
Okay? I don’t understand the point you’re trying to make.
@@ButterPockets Dunno, that VFA belt induced artifacts decrease with speed. Print faster than ~180-260mm/s and those mostly go away.
The default settings for the Plus 4 are faster than that. The problem is you can’t ALWAYS be at that speed. Notice on the rock wall it’s right between the corner and rock section. No matter what you set your speed to it’s going to be going much slower through that section unless you have absolutely bonkers accels. Especially for printers where going faster helps, it only exacerbates the problem because on small prints you’re not going to keep the speed up. It has to accelerate up to that speed so it’s going to be hitting it at some point. It’s not as easy as “print faster” especially get the default outer wall speed is 200 mm/s. The VFA tests corroborate this tho, and you can see as it transitions to high speeds the effect lessens, but it’s not going to go away. It’s the exact same thing BL tried to pull with the X1. It means the fundamental frequency of the system is too low and you must print above it to not have it. The problem is that you’re going to push into higher order modes and harmonics. Whereas with a well built system you could print *under* the fundamental frequency and have absolutely no modes present.
yo, what size is this? build looks awesome
It’s a 300mm. Thanks!
Hello if u don’t mind can u do me a favor and messure the depth from foot to foot I want to by a tool chest to use as a table for it and the one I’m looking at is only 18 inches. I know the site says it’s 19 and change. So was hoping the feet are a little bit shorter. Thank you
I measured the outside of the printer and it’s about 19 3/8. But the feet themselves would be less. The feet could sit on something about 15.5 and a little bit. But the entire body is 19 3/8. If you were really tight on space, including the screen and filament holder, the TOTAL thing takes about 21”.
@ sweet thanks that helps a lot. And perfect timing there was only one left the was more then 21 inches deep.
@ sucks about the bfas. I already ordered it before seeing ur video. Hope it gets fixed. But would be awesome to make a video if u figure it out. And I’ll let u know if mine does the same. Also would be dope to make a beginners guid series with the plus 4. It’s my first printer and I’m going in blind.
I have pretty much no VFAs on my Qidi plus 4, did you run the input shaper again? how sturdy is the table it's on? maybe something has too much play, some early models had some play in the head.
Yeah I’ve run input shaper multiple times due to tensioning the belts. It’s on that slab of granite which is on my heavy duty shelves (you can see them in other videos).
@blacksynth me either
My machine has bad VFAs very similar to yours. I have been trying to solve for well over a month now. I believe it's related to the bottom bearing in the X carriage. It's a graphite bearing not a ball bearing. Qidi suggesting oiling it (not greasing), maybe you could give that a shot? I'm pretty active on the Qidi Discord and it's a few of us that have 'unsolvable VFAs' but most people can get them to go away through tweaking. It does take a little effort on the user's part. It would be great if Qidi just figued out how to ship the printers in a more tuned state.
I did oil the bearing up and that didn’t seem to make any difference. Thanks for the suggestion!
Hey Spooknik!
Good material! Polymaker ASA have you print on it? On Bambu X1 is very hard to make a usable print with this mayerial.
Yeah I use Polymaker ASA a lot, I just happened to use Polymaker ABS here. Much easier to print than the ABS in my opinion. I’ve had pretty decent success with it in my X1 tho.
I use Polymaker ASA on a P1s with no problems. No warping, good bed adhesion using glue stick.
Did you print with the default profile? I printed directly with the default settings of QIDI Studio, and the VFA was almost gone.
I mentioned in the video when I did and didn’t print with default settings
It’s an amazing printer for the price.
Interesting that you experienced more VFAs than normal. I had the exact opposite experience. My Plus 4 prints exhibited far fewer VFAs than any of my other printers.
That’s awesome and was my hope. Outside of that issue it prints phenomenally!
Do you use the Qidi studio slicer? Just curious if this might have anything to do with it.
@@ButterPockets In general, most Plus4 printers seem to produce some of the most VFA free prints I've ever seen from a stock printer. Usually retensioning the belts and/or adding some lube to the linear rods tends to clear them up, along with making sure you run the ideal speeds for your printer. My Plus4 prints nearly entirely VFA free at around 200-250mm/s for example. Not the only good speeds, but known to work well.
A++
its very likely a tension vs speed vs motor resonance issue look up MRR one way to upgrade this or remove the problem (if neither changing belt tension or speed fix it) is to have a motor replacement with a lower MRR. I have a qidi plus 4 and dont have this issue. back in the day the tmc 2208 could have also been an issue but this has been upgraded to remove salmon skin in modern iterations so what i said earlier is the most likely. Hope this helps!
Yeah I do know about these things. I’m hoping to go in and change some settings on how the motors are driven to see if I can resolve things with these motors in particular.
What they should really do is make a cutting mechanism that cuts below the nozzle. So on a filament change the printer cools the head, pushes out just enough filament for any bulges, then cuts. Almost no wastage and potentially no need for a poop purge either (or just a very small one).