LaserBrain

my UM3 is on 5.2.11 and it's fine.

eek!

You can also re-purpose a food de-hydrator...

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Great to hear, I also noticed that the wait time on an abort is longer, seems to want to complete whatever is in the command queue perhaps. As for the warning, red and green are often used but also cause difficulties for colour blind people. To meet usability regulations, it's often found that a symbol is used then coloured, so even if the red is mistaken the symbol is not. Fire is often yellowy orange, so perhaps that's what they were going for, perhaps if they used the symbol that's on my bed glass in orange it would make more sense.

From having read the entire thread, there is no way for you to roll back the firmware. However your reseller should be able to do it for you. This is the recommended action for you to take to get your S5 up and running again. Good luck.

That’s where my UM3 is. Everything seems to be working. The auto levelling is now done at four points, better than previous firmware.

Sorry for the slow reply, not been on the forum for ages! As far as I'm aware no, it doesn't scale up. I have however found it is model dependent, I have a couple of complex models that do better with not so much negative adjustment when compared to a simple cube and cylinder. Curious, but it's what I have observed. I did my original adjustments on small 20mm sized prints, then a larger one with interlocking parts, where previously the interlocking parts did not fit, post adjustment they did, quite well in fact. However on something more complex it made the parts too loose, this was a smaller model than the previous one with interlocking parts. So I would say it's not an exact science and finding the right balance may be necessary via trial and error. good luck.

Hi Everyone, I noticed this evening that having looked in the Cura Connect page on my UM3 I saw that it said, "This printer can now be updated with firmware version 5.2.11". Also it says below... 'No Ultimaker printers found on the local area network.', apart from the one you show above, ....which is on my local area network... ok then... whatever. 😁 Working for a software vendor, in the product management and development side of the business, one of the things I like to do always, is to read the release notes to understand, changes, updates, new features and most importantly, known issues. Couldn't find anything (not easily anyway) on the main website, just ended up at a download page or an page from the manual telling how to upgrade, so I though I'd hop on to the forum and ask if anyone knows where they can be found (older versions, UM2, have at least one in GitHub). Little did I know I'd find this thread, i have read all 13 pages this evening. 😮 Wow, just wow! Glad to see it's moved forward, I'm going to check my UM3 firmware version tomorrow to see what it's at, should be interesting. I haven't run an X/Y calibration for some time, it's on a wired LAN connection, auto levelling seems fine, although I've not done a dual extruder print for some time and my printer usually pops up in Cura (4.4.1) without issue when I turn it on. I do normally update firmware when it pops up on the screen, so now I'm sitting here wondering what version it's running. Could it just be that as a general home user I just have not hit the issues because I don't need to, perhaps like many other UM3 / S5 users out there? Could that be the reason for just "0.1%" user noise? "Everything works until you find something that doesn't!" onwards and upwards!

Hi Jones4642, Happy to pick up the thread again. The only way I managed this was to do this in Cura. It’s a bit trial and error, but I used a cube and an open ended cylinder to measure external and internal diameters. Then adjust, print, adjust, print until you’re happy. The horizontal expansion settings apply to all polygons in the print, the layer one setting can help reduce elephants foot, also helps when fitting parts. it just takes a little time, patience, a reasonable set of callipers to measure with. Good luck.

@MichelLin I did, fiddling with the horizontal expansion settings was certainly the main one for me. The problem for me was that my holes were too small and the outer dimensions too big, just as you described, so it was an instant win for me. Give @SandervG settings a go too and let us all know what you find. 🙂

link to my outcome from testing and setting changes...

Hi @mzcukier, sure the settings you need are in the 'shell' section of Cura and are called Horizontal Expansion. There are two settings, one for the first layer, this helps with 'elephant foot' problems, the second is for the rest of the model. Mine are set to -0.16 in both. A negative setting reduces the overall X/Y dimensions. Also attached are the STL files I created so you can check the outcome. the cube is 20mm all round. The Cylinder is 20mm, print with the base on the bottom, the walls should be 1mm thick giving an internal diameter of 18mm. When you have got your settings right, print the combined Cylinder and cube to see if something more complex upholds all the measurements. If so, you're done, go print a multi-part model and see if the parts fit. Enjoy! 20mm_Cube.stl Combined_Cyl_Cube.stl Cylinder.stl

Settings are custom once I had changed the Horizontal Expansion settings, but based on normal, speed at 30mm/sec. It's slow but accurate and the print quality is good.

OK @mitu, well you have more experience than me in the mechanical side of life. My Prusa clone is a long way off in terms of parts quality compared to the ultimaker, so my experience differs from yours in that respect. I solved the inaccuracies by using the horizontal Expansion settings in Cura which applies settings to all the polygons that make up the model. I can only assume that having these settings is to mittigate the potnetial issues that I had and that you are also seeing. I started out in this thread with the following issue... "Having printed a 20mm calibration cube, I get the following, Z=20.01 X=20.32 and Y=20.20. The X & Y being that much over causes parts in the model not to fit." So yes out of the box my X & Y were not what I wanted either, whether this is by design or an outcome of the manufacturing process, I don't know. However, the 'quality' of the print far exceeded what I could get from my Prusa clone. Only when I started to print parts that needed to fit (internal & external sizing) did I find the problem. It took me just a couple of hours of work to resolve it once I was pointed to the right place in Cura. My method was to create a 20mm cube and a 20mm Cylinder (open one end with 1mm walls). The Cylinder was done to be able to check external, internal and wall measurements. I printed them separately, measured, changed settings and printed again. Then repeated the process until I got my desired result. Finally I combined the cube and cylinder into a model where the cylinder overlapped a corner to create a more complex model. Dimensions were upheld when compared to the final test objects. Then I printed the multi part items and bingo, they fit just perfectly, little bit of interference but in this case that was fine as they needed to be held nicely and not loose. I don't have part sizing issues any more. It can be done if you're willing to spend a couple of hours, if you still feel this is not the experience you were expecting then I suggest you take that up with Ultimaker or whoever supplies support for them in your region.