tinkergnome

What have you tried already? AFAIK Marlin does not support SSD1309 OLEDs directly, or does it? I think you will have to merge it with the display routines from the original Ultimaker firmware. The source files for the latter are public available here: https://github.com/Ultimaker/UM2.1-Firmware Take a look at "UltiLCD2_low_lib.cpp" to get an idea.

@nilrog, @zerspaner_gerd Are you aware that you can change the notification settings for every single thread? The global preferences are only used for new threads (AFAIK), and there may be different settings for older threads that were migrated from the former forum version. There is an option in the menu in the upper right corner (with your username): Manage Followed Content You can inspect the settings there, but also select all entries in the list and change the notification for all at once, if you want.

True, i thought that the "print core cleaning" wizard takes care of the temperatures and you only have to follow the advices on the screen? But i have not double-checked. The second article about the Atomic Method (for other Ultimaker printers) mentions 90°C for PLA and 110°C for ABS.

I cannot help with the un-clogging, but one thing i noticed: If you don't use the BB core / PVA regularly, it's important that any PVA residues are removed between the uses (or if you put the printcore in the shelf). Usually i remove the PVA spool as soon as the print is finished and just feed some PLA through the BB core. I never had a problem again since then.

...but one can imagine printers with swappable build surfaces and auto/active-leveling..., right?

I tried it, and Cura opens your file without problems... ...but the 3D object is not little, it's extreme small - only 0.4mm - so it's a bit hard to locate on the screen.... Here is how it looks like, if i scale it up by 10000% or so...:

Here is a picture how the start script looks like in my "hacked" printer definition. The 'priming step' uses the temperatures of the first layer for both extruders. Unfortunately i cannot reproduce your problem with this script. If it looks different in your machine settings, the changed definition is not used by some reason. Can you make a comparison? I can make a pull request for the Mark2 repository, but only if we figure out, if it works properly.

Sorry, but I think, that's a wrong expectation. Because the printhead is lightweight (compared to direct drives) it is also less sturdy (or more wobbly - if you want so...). You can even switch off the acceleration and jerk control in Cura entirely, the printer will then use the default values that are defined by the firmware (which are probably quite high). I assume you will get much more ringing or other drawbacks. You'll have to find a compromise that works for your specific models and requirements.

Yep, Cura inserts the standby temperature for the inactive extruder now. You have to adjust the start script (if you have a customized one). @ahoeben explained the new possibilities in the Cura 3.2 BETA thread.

rough guess: check the path declarations in the Makefile. Some of the directories have changed - depending on the Arduino version (and perhaps also on the OS version?) You can use the following commit as a starting point: https://github.com/TinkerGnome/Ultimaker2Marlin/commit/31b016ff886bb509cf5515042ca225ab08180903#diff-04c206a8bd7b5cedd4c30700d062b19a

It's just a simple factor, make the reverse of this calculation: https://github.com/TinkerGnome/Ultimaker2Marlin/blob/geek_mode/Marlin/UltiLCD2_menu_first_run.cpp#L453 it's the output of this test - nothing to worry about

I doubt that this is solvable with the available internal tools of S3D (at least not in the way that Cura does it). You should get in contact with @zerspaner_gerd. He made an (external) python script for this purpose, it would be nice if someone can translate it (it's in german): https://community.ultimaker.com/topic/20733-externes-python-script-für-simplify3d-dual/

in addition: have you checked the 3D model and the layer view? Perhaps it is not printing one or another layer at all - and then tries to lay down the following layer in mid air...?

I think, the "cutting mesh" feature is intended for those use cases. I have not used it myself yet, and I'm not sure if there are instructions somewhere to find? Basically you create and load additional meshes, place them in the areas around the holes, mark them as "cutting mesh" and define different speed settings. (use the "per model settings" for the latter tasks)

It's not that hard. @gr5 made a 'compiling cookbook' a while ago: https://community.ultimaker.com/topic/16856-how-to-build-marlin-the-way-tinkerghome-and-ultimaker-do-it-if-you-have-windows/ I wouldn't use the Arduino IDE for this project, you have no control about the linker. You cannot decide which object files it includes and in which order. Sure, it builds and uploads a *.hex file, but it's not reliable reproducible (IMHO). What do you want to change? I thought @bondtech offers a ready to use firmware?

...or the chosen polygon resolution (count of faces) is too low? At 50mm diameter one would measure quite a few deviations, if one prints a polygon with (let's say) 20 edges instead of a true cylinder, right?

We tried to inherit the quality profiles from the UM2+, but this seems not to work anymore (with Cura 3.x). This is a task for someone who knows more about the Cura internals. I made a test definition for the Cura 3.2 BETA without this linked quality settings, so you get at least the ability back to use the standard profiles (and you can save your own). The link to the definition file is in this thread, if you want to test it. But the modified start script only works for Cura 3.2

I doubt, that there's something hard coded regarding the support structure that depends on the machine type, my first thought is: make all support settings visible and compare it again....

@3DukeEngineering Do you use 'active leveling'? Perhaps is the z-offset of the nozzles not correct? I would carefully clean the nozzles, make a manual bed leveling and re-check it it makes a difference.

Short answer: switch to branch geek_UM2extended and use the additional "DEFINES" from the build script. This will result in the correct variant. Or adjust the path to the Arduino compiler in the build script and use the script to build the *.hex file(s) - whichever is easier for you.

Yep, the setting stays there, once it is stored - at least until the next "factory reset". Go to "Advanced -> Preferences -> Print area" and reduce the maximum z-value to a lower value (225mm is the default for an UM2+). BTW: thank's for the picture - it looks great!

Groots! That gives much more control for multi extruder printers. Dank je wel! And i agree - if Ultimaker likes to see more contributions - documentation is the key...

Cura automatically adds temperature commands at the beginning of the gcode, if the variables are not found in the start script. I just noticed, that the behavior has changed for 3.2 BETA. It now inserts the standby temperature for the inactive nozzle. That leads to an issue, if the subsequent start script wants to prime the nozzle afterwards. It just does not work anymore, because the standby temperature is usually too cold. Adding the available variables to the start script does not work either, because there's seem to be still no separate variables available for multi extruder machines. Is this on the todo list? Or is there another way to heat up each extruder to its own configured temperature?

Ok, but I use the Mark2 printer definition together with the printing profiles in Cura without problems. I was not sure, if we are speaking about the same things, that's why i ask.... Can you shine some light on what precisely does not work? (perhaps better in a new thread) @RudydG Edit: I think, i know now what i made different, the root cause seems to be the link to the quality profiles of the UM2+. I made a new version for Cura 3.2. Can you try the following printer definition with Cura 3.2 BETA? Mark2_for_Ultimaker2.def.json (right click and "Save target as...")

There are several filaments nowadays that can withstand 100°C and more, what are the mechanical requirements? Some possibilities that are easy to get in Europe: ColorFabb HT FormFutura Volcano PLA Extrudr Green-Tec bioFila plaTec take your choice...