RE: After 1 Week with the Core One ... was this a good idea?
because we, as a company, have 2 Mk4s, so I want to try to convert them into something useful. so this was an attempt to do that, instead of just throwing up our hands and walking away.
Let me ask you: do you own a MK4S? are you satisfied with its performance versus other offerings, bambu or others?
RE: After 1 Week with the Core One ... was this a good idea?
Also my current (small) project has a requirement to be 'food safe' (ABS definitely isn't and the 'jury's out' on ASA)
@jm, I am not sure how strict is the 'food safe' requirement you need to address, but if I recall correctly, iFDM prints in general are not food safe, regardless of the filament. It's not about the material but about the porosity of FDM printed objects.
RE: After 1 Week with the Core One ... was this a good idea?
The order of doing things doesn't matter, since you'd repeat it exactly the same, coming from a cold printer, ...
I am not sure that the starting state is always 'cold printer'. What if the power outages was a short one and the printer is still warm? Also, the X,Y,Z homing happen at the same time, and homing Z with a cold printer and then printing with a warm printer can result level mismatch.
Your point about 'failing fast' makes sense.
RE: After 1 Week with the Core One ... was this a good idea?
Let me ask you: do you own a MK4S? are you satisfied with its performance versus other offerings, bambu or others?
No, I bought a complete Core One kit; actually my first Prusa printer. It is far from perfect and I am disappointed with various aspects of the printer (VFAs, various stability issues, half-assed accessory designs), but I did not see a better alternative. Bambu was not an option for me once they launched their locked-in firmware -- I actually had a P1S on order in January, just when they announced these plans, and returned the box unopened.
I was just surprised that for you, the cards seemed so clearly stacked against Prusa and you still went with the upgrade kit. Especially for a company -- when you count the cost of your time, that kit build must be painfully expensive.
RE: After 1 Week with the Core One ... was this a good idea?
So, to be clear, you do not have any experience with other platforms, other than the Prusa?
RE: After 1 Week with the Core One ... was this a good idea?
My first week has been mostly positive. I had one disaster with the belt tensioner - fixed thanks to a better designed replacement on printables - and some of the assembly was frustrating. But its quick, its quiet, its compact, its another Just Works printer for me. I've already printed dozens of parts in a variety of materials. I wanted the Core One for the enclosure so I could print with more exoctic materials. PCCF is now my favourite material. It looks like a professional part.
I think Prusa could have done a better job of explaining the XY carriage alignment. It needs to be squared with the belts loose (no tension) and then when tightening you must ensure equal tension in both belts the entire time. If the left adjuster has more tension it skews the carriage left, and similarly the right adjuster will skew the carriage right. I squared my carriage using the "wrench on one side and gently bend the other side" trick on the Prusa troubleshooting guide. Then used two hex keys and turned both sides at the same time to the correct tension.
Also the wiring/cabling gets a C- for not using proper cable duct. Voron does this correctly. I'm not sure why Prusa is still using cable ties and hopes and prayers.
RE: After 1 Week with the Core One ... was this a good idea?
Well, it takes a bit of time and experience with several other platforms to form an educated opinion. It's unfortunate that people like @Jurgen-7 decide to weigh in. As far as I can tell, he/she has no experience with anything other than the Prusa Core-One platform. A test to all of our endurance, I suppose.
RE:
I wonder, what caused you to conclude that he doesn't have experience with other 3D printers?
Well, it takes a bit of time and experience with several other platforms to form an educated opinion. It's unfortunate that people like @Jurgen-7 decide to weigh in. As far as I can tell, he/she has no experience with anything other than the Prusa Core-One platform. A test to all of our endurance, I suppose.
@fullmetalnozzle, I wonder, how did you conclude that @Jurgen-7 doesn't have experience with other 3D printers?
RE: After 1 Week with the Core One ... was this a good idea?
Well, it takes a bit of time and experience with several other platforms to form an educated opinion. It's unfortunate that people like @Jurgen-7 decide to weigh in. As far as I can tell, he/she has no experience with anything other than the Prusa Core-One platform. A test to all of our endurance, I suppose.
You misinterpreted what I wrote -- "the Core One is my first Prusa printer". Also, you seem to have misinterpreted my post as a whole. It was not meant as a personal attack against you, so there is no need for an ad hominem reply.
RE: After 1 Week with the Core One ... was this a good idea?
@zapta
I'm trying to print a repair to a dishwasher cutlery basket (it's a compact size and all the commercially available baskets are too big). The model will have to withstand 70deg C so that rules out PLA, PETG is the next 'food safe' filament and that's 'just' OK (not ideal as it's malleable at 70 but hasn't exceeded the 'glass point' for PETG) as the basket won't be used to store food and it's, by default, regularly washed I don't think I've got to worry about food trapped between the filament layers. I'm avoiding CF reinforced filament as the fibres may break off. I bought some PC blend with the Core One thinking that would be more temperature resistant but I found out it contains BPA 😩. As I mentioned before ABS is out and ASA may or may not be suitable (as it's in industry's interests to lie about it - I'm going to avoid it until an independent scientific body proclaims it safe). That leaves Polypropylene which requires an expensive print plate (as well as being expensive itself).
Perhaps I'll just keep washing up by hand 🤔 ... I never rated dishwashers anyway - you need to remove any stubborn bits by hand, so you might as well carry on and complete the job 😁
RE: After 1 Week with the Core One ... was this a good idea?
I apologize. I'm just being a grump, annoyed with Prusa. I take it all back and apologize to the group for introducing grumpiness.
RE:
@zapta
I'm trying to print a repair to a dishwasher cutlery basket (it's a compact size and all the commercially available baskets are too big). The model will have to withstand 70deg C so that rules out PLA, PETG is the next 'food safe' filament and that's 'just' OK (not ideal as it's malleable at 70 but hasn't exceeded the 'glass point' for PETG) as the basket won't be used to store food and it's, by default, regularly washed I don't think I've got to worry about food trapped between the filament layers. I'm avoiding CF reinforced filament as the fibres may break off. I bought some PC blend with the Core One thinking that would be more temperature resistant but I found out it contains BPA 😩. As I mentioned before ABS is out and ASA may or may not be suitable (as it's in industry's interests to lie about it - I'm going to avoid it until an independent scientific body proclaims it safe). That leaves Polypropylene which requires an expensive print plate (as well as being expensive itself).
Perhaps I'll just keep washing up by hand 🤔 ... I never rated dishwashers anyway - you need to remove any stubborn bits by hand, so you might as well carry on and complete the job 😁
@jm, this is what ChatGPT has to say on the topic (long, it starts at the top). ABS and PETG are not a good fit but PETG is better than ABS.
https://chatgpt.com/share/688f88a2-eb90-8000-a007-480ed87e7a2a
EDIT: It says PET is a better fit. I never printed PET and know nothing about it but it seems to be available and cheap. https://www.amazon.com/eSUN-Filament-Resistance-Toughness-Printing/dp/B0DDBYTG7J
EDIT: Yet another source for PET filament 😉
RE: After 1 Week with the Core One ... was this a good idea?
The Prusa is a great printer, and I enjoy the build process, but being. Bambu owner also, I must admit I trust the Bambu a lot more than then the Core One at this specific time.
The Prusa I keep in my office with me so that I can keep an eye on hit, as I don't fully 'trust' it so far. I want to ensure the first layers have gone down properly, and only print with it when I am present, or close by - usually for smaller single colour prints, or when prototyping a model for instance. Saying that, it rarely lets me down TBH.
The Bumbu lives in my outbuilding with 8 colours loaded across two humidity controlled AMS units. I send a print job remotely. Used for lengthy or multicolour prints that I'm confident to let run overnight etc. I keep the odd eye on it remotely using my smartphone thanks to the built in cameras. But I trust it enough to only pop out and visit it to collect a completed print job. With the way everything is integrated (filtration, cameras, multicolours etc) it really is a nice overall package that 'just works'.
Don't get me wrong - I'm not a fanboy of either. I have nothing to gain from promoting one over the other. But I've always had a soft spot for a Prusa machine and I will certainly keep my Core One - at the same time I know Prusa will continue to work on its refinement. I'm just hoping for a good MMU solution and some further refinement.
RE: After 1 Week with the Core One ... was this a good idea?
@zapta
Thanks for that (I wouldn't normally go anywhere near these AI platforms but in this case it's provided interesting, and relevant, information).
Not sure about the PET ... 75deg C doesn't leave a lot of headroom - Looks like PP is the way to go ... £50 + filament + postage 😭 (although Prusa have an offer of print plate + PP-CF or PP-GF but they warn about surface 'cracking' on both - not sure which)