brightorange

I see more people suggesting manually/mechanically offsetting the automatic leveling to make the first layer more squished to the build plate. is there a way to add a "correction value" to the automatic leveling value? offset each value by X mm ? Or if I lower the first layer height it will give the same result?

hi @SandervG I notified the lab I am working in, that we should be in touch with our dealer to coordinate regarding 4 printcores that were discarded because of these issues. This is already $400 that this thread has saved them.. To summarize this long thread I kinda hijacked, I think transparency regarding these kind of problems is very important. You admitted that your dealers were getting special updates regarding this issue and how to deal with it. The issue can cause a relatively minor thing like print detachment to full-blown disaster (over $400 in damage) Why is this so critical to some customers? because with open source 3D printers you can play with a lot of settings, sometimes the dealer can decide some issue is your fault because you did something wrong, and you are helpless. If an issue is known to happen more rarely or frequently, this can be a factor in deciding if you deserve service or not. I hope this forum post can be enlightening for other users and save them undue costs and unnecessary arguments with their dealer.

@engr I am @wydmynd too. I have reason to do so. I am not rjd. no conspiracy here.

I believe you that you may have 1 in 1000 prints come loose , but consider this: not all users are knowledgeable. beginners may send things that are not recommended to print. these prints may have much higher tendency to cause problems. when I have 1 in 15 coming loose is when working with CPE and nylon. say you are a school sending beginner-level projects, or a lab working with nylon/CPE/other, so you have 1 in every 50 prints come loose. let's say this severe clogging problem occurs only once out of 3 times the print comes loose. if you send 1 print every day on average, you will have a failure every 6 months on average. this is still not acceptable! now imagine you have a lab with 6 new shiny printers. You will have , on average, this severe problem every single month! every month an argument with your dealer who'se fault it is, and maybe a charge of $200 or more. if your printer is out of warranty, you are looking at $500-600.

hi again @SandervG thanks for forwarding and working towards more transparency regarding this issue. they were kind enough to call it a "coin" but it felt like a medal regarding solutions - If UM is smart enough to encourage community projects using the camera for diagnostics, I am optimistic such problems can be first candidates ( from now on to be known as "spaghetti classifier" and "blob classifier") thx for all responses , waiting for updates

hi again. I usually dont spend time in forums and trying not to be too much of a troll. I have vast technical experience with 3D printers since my first printer I assembled in 2011 (the kit came with an actual, physical medal. because if you got it to work, you deserved it!) I am trying not to expose myself too much but I recommend UM printers to schools and institutions because I think it is the most reliable printer under $5K for institutional use. labs I work with have logged over 55K hours of printing combined, on UM2/2+ alone prints detach from buildplates, at least partially every ~15 prints on average I would say. even if you always turn on brim (which rules out some types of models i.e with hinges or chain-like) the only way to make 100% sure your print stays stuck to the build plate is to check it every half hour or so. I tell printer operators, 90% of failures are in the first layer. even so, prints can detach even if you put glue, and made super-sure that the first layer is fine. especially with non-PLA materials. And you know well that they can detach in the 3rd, 4th and 50th layer. It happens. till now, no biggie. just come in the morning to pile of premium ColorFabb spaghetti. My point about misleading post is that I do not consider "making sure your print sticks to build plate" as a solution to this problem, when you are dealing with a school or company that has over 3 printers and just expect them to work well, or at least fail gracefully when they do. Remember, these people don't have the time to monitor the printer every 30 minutes. If the school lab manager swears to me they checked the first layer was stuck well to the build plate, and they come in the morning to a print head un-repairable heap of bent metal and goo, imagine their un-pleasant surprise when they discover the malfunction is considered their fault and may not be repaired for free even under warranty. I think it is good and fair that you are admitting that you moderated the post including the "salespartner only" document even though I only pasted 2 short paragraphs from it. but I know some of your customers (incl. my partners) are not getting the service and repairs they deserve under the terms outlined in the document. will you take responsibility??

@kmanstudios excuse me your response is highly misleading. I have worked with 30 different machines UM2/2+/3/3E since 2015 and never seen such catastrophic clog result from such a common problem (print detached from bed) as far as I am concerned there is no proper solution to this problem. every time it occurs my sales representative requires me to purchase 2 new printcores (over $100 ea) and if the machine is out of warranty I need to pay for the whole head replacement (in some cases, clog is so bad that metal parts are bent and no repair possible) prints detaching from print bed is something to be expected in 3D printers, and cannot be avoided completely. especially when working with CPE , Nylon and other materials I currently instruct colleagues to use ABK sticker sheets with all materials except PLA. I decided to paste some of the content of the service update. notice the text "Salespartner only". so it is not publicly admitting there is a problem , and also admitting that repair is sometimes impossible. I will do this in next post. I hope it is not moderated.

@kmanstudios thanks for the reply. If I had bought the printer and it had said "you must monitor print every 1.5 hours using app or catastrophic failure can occur , you may lose both printcores, and the entire printhead if using nylon or cpe." then I would accept your comment. unfortunately sales people say it is no problem to print unattended, worst case your print may fail. now i have found a "private" document published only to service providers. they call this problem "flooded print head" and comment that this problem can happen more often than they care to admit. and they are "investigating". but no word to customers. this is not fair. i already lost 4 printcores!!! my provider will not replace them. now UM is admitting to a problem and they instruct the provider to fix the problem, but my provider will not fix it for free even though my printer is under warantee. I can try to link to the doc in a separate post so it does not get moderated.