CTotten

After some additional work, I think this was an issue with the print file, although not sure what would cause that. I switched over to printing the identical part in a different color, and that print is just fine. Odd. I printed 2 in red that came out as expected, had some issues with the machine that I had to fix, and also updated the print file to block support material in some areas that were not needed, then this started happening. The new prints in a different color are also using support blocking, but not issue. Oh, well. Chalk another one up to gremlins, I guess.

Have you checked to make sure your lift switch is calibrated correctly? If you #2 printcore is not lifting when it is not in use (thus dragging across layers, or colliding with things), that could explain a lot of what you are seeing. I had this happen a couple of times over the years, where the lift switch calibration suddenly was not correct.

I have seen this, and it is really annoying. It is using the Print Core Change button, the print head will move all the way to the front of the printer, and off to one side (say the right side if changing print core 2), and the print bed lifts all the way up. There is no way to open the door on the print head in that configuration. You can open it enough, and move the print core enough to break contact with the mating board (fool the printer into thinking it was replaced).

I recently started having some issues where large, flat layers are very "bumpy" and "fuzzy". I have A LOT of little balls of filament at the bottom of the printer, as well. The first picture is the top layer of the last 2 units I have printed. The second picture is the previous ones. Any ideas? The issues started after I had a bunch of issues all around the same time. Front fan stopped working, so I fixed that. Also replaced bowden tubes, cleaned the feeders (and checked tension), and replaced both print cores. And this is not limited to the top layer. I have seen this a lot of times over the years on the first layer, but it gets cleaner after every layer during the build, and never seen this on the top layers. I feel like this is over-extruding, but I haven't been able to get this to stop. I tried raising and lowering the extruder temp (+/- 5 degrees), tried reducing material flow (to 90%), and even tried slowing down the print speed (to 75%) all from the S5 touch screen during a print, with no noticable change. These are "lab fixtures", so they do not need to be pretty, but it is pretty annoying to have this sudden drop in quality of the finished surfaces.

I had been using the Vision Miner Nano Polymer adhesive for over 2 years with excellent results. I have printed over 100 full spools of CPE. But I am not very confident that this under the radar increase in bed temp is the cause of my issues. What frustrates me is that I use "profiles" that I set up. Apparently those profiles aren't as "secure" as I thought. I obviously only "locks" settings that I have changed from the default. And if the default value is changed in Cura, then it changes it in my profile with no notification...

I've had this happen several times, and it is frustrating that it is considered a "fatal" error. I also have recent had several instances of "Air Manager Fan Is Unable to Rotate at the Desired Speed".

I looked through my records: Sept 20, 2021: I updated CURA to version 4.11 Oct 16, 2021: I requested to order new S5 print bed glass panels through our purchasing system. This was after a few sheets got shreaded during printing. So my working assumption now is that when I updated to Cura 4.11, I got the update that changed the CPE print bed temp to 85C. This increased temperature is the cause of the bed delamination issues. I am not currently printing big jobs, but I will be overriding the print bed temp setting back down to the 75C range for S5 prints to confirm this was my issue. I also searched through the Cura update notes on the UM website, but couldn't find which version added the CPE temp change. But I know it was put into the code (through GitHub) around March 2021.

So I updated Cura to v4.11 around the end of September. Not sure if I was running 4.9 or 4.10 before that. But by mid-October, I was requesting to order new glass print beds, meaning I had starting having the glass delamination issue in late September to early October. I guess I didn't post anything on the forums until November, after it had happened multiple times. Can anyone confirm which Cura version added the change mentioned above?

That is very interesting. I started having my issues with the delaminating glass around November. I will have to dig through my records to see when I updated Cura versions. I don't update every time a change is made, so that may be when I finally got this update.

@SandervG Can you confirm when you guys changed the default bed temperature on the CPE material? I remember it being 70C on my original UM3E profiles, and 75C on my UMS5 profiles. Now it is 85C on the S5 and UM3E. I have been using CPE almost exclusively over the last 3+ years. I have printed over 100 full spools of the material, and we love it. It is strong like ABS, but prints very easily without a lot of effort. Plus the chemical resistant allows us to use it in a lot of applications, including overmolding silicone over it. But over the last few months, I have been having issues that I think are related to a recent increase in the default bed temperature. We are routinely having bed delamination after big prints (never seen this before recently, but have replaced 6 glass beds since then across my 2 UMS5 machines), as well as the bottom layers on large (tall) prints are deformed, like the material on the bottom layers is staying too hot, and deforming from the weight of material above. Both are recent phenomenom (like since Nov/Dec time frame). I have not had a chance to test out my theory (eg reduce bed temp back to 75C), as I have not been printing as much lately.

Just an update. This is still happening. I have went through 6 total pieces of glass over the last 4 or 5 months. I also noticed that the first few layers of some of my prints appear to deforming, more than I ever noticed before. Not just the typical elephants foot on the bottom layer. I also noticed that UM increased the default bed temperature for CPE "recently". I just noticed that the bed temperature is now set a 85C for CPE prints. My memory was that it was 75C prior to this change. Does anyone know when this change occurred? My thinking is that the increased bed temperature (which I have never adjusted from the factory defaults) is possibly the culprit for the delaminating glass, as well as the deformation on the bottom few layers of the prints. They say the change was for "increased bed adhesion". But my delaminated glass says I have too much adhesion now, and the deformed bottom layers says the glass (and material) is staying too warm during the print, and deforming under the weight above on large prints.

Thanks. I was wondering about the humidity, as it has been pretty dry recently, even for a typical November here. I have switched to using the the UM supplied UHU stick, with a clean glass and a fresh coat of UHU prior to each print, and I have not had the issue over the last week. I did redo the manual bed leveling when this first started happening, thinking that a cooler temp (at night, since they cut the heat back) caused some contractions of the long Z axis components caused the first layer to print too close to the glass, but that didn't seem to change anything. And I run two different UM S5 Pro Bundles (one old version and one new version), and they both started doing this at the same time. So in my mind that eliminates the possibility of an issue with a single machine.

I have been using an S5 for about 2.5 years now (using two S5 Pro Bundles for the last year). Since I got the first S5, I have been using basically the same glass print bed for all our prints. Our original S5 has about 6000 operating hours on it, and our newer S5 has about 2000 hours on it, so they have been used quite a bit. Overall all of that time, I have had a couple of small glass delaminations occur, but we were basically still using the original glass beds. I started using Vision Miner's Nano-Polymer Adhesive about a year ago, because it held both the CPE that we print 95% of our jobs with, as well as BreakAway. I haven't had any issues with it, except that it holds the BreakAway really well, meaning I have some scraping to do between prints. In most cases, the CPE only prints just pop off after they cool down. Anyway, about a month ago, I came into work and found that both machines with finished prints, but when I removed them, significant portions of the glass delaminated with the print. I thought it was odd, but the glass was old and had a few chips in it, so I thought it just finally gave out. So I pulled out the brand new spares. The few days later, the same thing happened with brand new glass. - I reperformed the manual leveling on both machines, thinking maybe it was a thermal issue with colder weather causing the first layer to print too close. - I also switched over to using the UHU stic provided from UM on the CPE only prints. We got 4 new pieces of glass from our distributor, and got back to work. Today, I come into work and find both prints again caused significant delamination. One print is about 8" x 8" square with a solid bottom layer. The other is a 8" diameter circle, with about 50% of it being a solid bottom layer (with some openings). So they are both "large" prints with solid bases. But I have literally printed hundreds of items like this without an issue. I am running 6.5.1 on both units, and have not updated firmware in about 2 months. Any ideas on the causes of this? I have shreaded 5 sheets of glass (at about $45 each) over the last month, after not losing a single one over 2.5 years. I am printing the same things, with the same materials, using the same techniques that I have been using for a long period of time. But something seems to have changed.

So here I am again. After almost a full year of operation, the dreaded "ER80" popped up again, causing a 3 day print to fail (after about 48 hours). As before, the fan is running when I found it, so any loss of Air Manager had to have been momentary. I am still concerned that this is a "hard" fault, meaning there is no way to recover from this. Seems like if the system "losses" the Air Manager for a few seconds, it should be able to recognize that the Air Manager is found again, and resume the print... It would also be nice to have some recovery instructions on the ER80 page. You have to power off the machine (fairly obvious), but then you get in a state where material is loaded, but the machine does not give you a way to unload it. I tried to start a new print, using different colors in each nozzle, and while it did unload both old colors, it then went into ER998 before it started loading the new colors. After another reboot, it seems to be operating normally.

I have the same issue. It is pretty frustrating that material station doesn't tell you that the material is loaded, but it doesn't recognize the material (just shows the Yellow Exclamation Point on the screen for the material you tried to load), unless I am missing something. Luckily, I have a ton of old spools laying around, so I just swap out the NFC tag.