tinkergnome

Yes, that's the easiest way. As an alternative one could add M501 to the very end of any gcode file. For example by adding it to the end g-code in Cura. This would fulfill the same purpose.

It does not actually "override" the configured materials, it just ignores the material that is selected on the printer. The material configuration on the printer (from the "material" menu) can not be changed with gcode commands - so all-clear on this topic (IMHO). On the other hand... all (other) Marlin settings are "sticky" and stay active until the next explicit change. Not all of them are reset at the beginning of a print. This applies (e.g.) for acceleration settings and speed factors. That's why it's generally a good idea to reboot the printer between prints with different gcode flavors.

@zerspaner_gerd: kontinuierliches Beta-Testing sozusagen...

Looks like enabled 'shields'. Check these two settings and switch it off:

Ultimaker Original is very well documented. It seems to be 12V, 1.2W https://github.com/Ultimaker/UltimakerOriginal/tree/master/1075_Print_Head_Fan_12VDC_1%2C2W

For older versions of Marlin (like the one that is used in UM2) the current axis position is lost after M92 (or better: is not longer accurate). Don't use M92 on its own, always send a subsequent G92 Exxx.xx to reset the position. I don't know the specific reason why you took all these measurements, but i think the used speeds are way to fast and the filament probably just slips more and more the longer the move takes. I would use an equal (and lower) speed for all tests. Let's say F180 or even slower (somewhat closer to 'normal' extrusion rates). The variation should be much smaller then.

Für welchen Drucker ist das gedacht? Z-Hop ist eigentlich nur für Delta-Drucker (und mit Einschränkungen für Dual-Extrusion) hilfreich. Für alles andere eher nich so... dort sollten Retracts ausreichen, um kein unerwünschtes Material zu hinterlassen. Mit diesen beiden "Combing"-Optionen (besonders "Max Comb Distance...") kann man das ganz gut beeinflussen: Einen großen Unterschied macht es, wenn die sichtbare Fläche nicht glänzt, sondern matt ist. Dann sieht man die Linien praktisch nicht mehr. Also z.B. nicht auf Glas drucken, sondern auf "Ultimaker Adhesion Sheets", auf Buildtak, PEI-Sheets oder auf ähnlichen "Unterlagen". Auf Buildtak sieht's am besten aus (IMHO), ist aber recht teuer.

It's a Cura setting: open the machine settings in Cura go to "G-code flavor" and select "Marlin" from the list re-slice done

Replacement patterns from these legacy Cura versions do not work anymore (AFAIK). Be aware that this thread is nearly 5 years old... Here is an example (extruder temperatures) for more recent Cura versions:

There should be a setting named "Brim only on outside" - which is probably enabled by default. I would disable it and check if it makes a difference. (make the setting visible first or use the search function)

What kind of printer is this and which version of Cura is used? (and because it's not mentioned: are we even talking about Cura...?) Be aware that M140 does not wait until the temperature is reached, only M190 does. In addition: {print_bed_temperature} is deprecated (for quite some years now) and not a valid variable name for Cura anymore, the line will probably be ignored by the firmware. It should be closer to your intention when you swap the sequence to: M117 Heating up PEI Plate M190 S80 ; wait until 80C are reached M140 S{material_bed_temperature_layer_0} ; set to temperature from Cura - but do not wait Your approach from the first post should work too if you correct the variable name.

The technical reason is easy: The Mark2 definition inherits from the regular Ultimaker2 plus definition - and Ultimaker has a whole bunch of materials excluded for the latter. See: https://github.com/Ultimaker/Cura/blob/master/resources/definitions/ultimaker2_plus.def.json#L16 If you want to experiment - copy the marked line from the Ultimaker2 to the "Mark2"- json-file and define your own list. Essentially: overwrite the list with a shorter (or even empty?) list.

I'm not aware of an easy way to switch between different start scripts in the printer definition. I would add two separate printers to Cura - one for single extrusion prints and another one for dual prints.

There should be a checkbox with the label "Enabled" somewhere... I use the "Sidebar plugin" - so it may be in a different position than in my screenshot - but it is there. If only one extruder is enabled (or present), Cura no longer adds tool change commands to the gcode and the pre-selected tool should just stay active. Personally I don't use Cura for single extrusion prints, but that's what i understood from the posts above? 🤷‍♂️

Marlin 1.1.x is very different compared to the older versions that are used as the basis for Ultimaker firmware(s). So i can only guess. "WATCH_BED_TEMP_PERIOD" has something to do with thermal protection, right? "Paused to use" is not to be found in Marlin sources. But there is "busy: paused for user" - which is a normal "keep alive" message that is sent to the printing host while the printer is performing long-lasting operations. It's possible to (temporarily) disable "THERMAL_PROTECTION_BED" during the testing period. Just to rule out configuration errors in this area. But don't let it run unattended.

Just to be sure - you have disabled Extruder 1 in Cura? And don't forget the other details of @navigators method:

"Extruder Start G-code" is the wrong place. Just increase the size of the "Machine Settings" dialog and click inside of the script frame(s). The script content will "magically" appear by doing this. It's one of several "Cura glitches" IMHO 🤷‍♂️ vs.

Your pictures do not look like the printer definition of an Ultimaker 2+. It looks more like a Mark2, but with an incorrect start script. Was this per mistake or is it somehow intended? I would add an "Ultimaker 2 Extended+" afresh to have a good starting point again. Or - if the printer is indeed a Mark2 conversion: you could add a new "Foehnsturm Mark2", adjust the z-height or compare/repair the start script.

well, a missing comma here and there can ruin your day... 🙂 There are validator tools for json-files (https://jsonlint.com/ for example). It's a quick check and can save you hours sometimes. Good luck!

Simply use an overlapping "modifier mesh" and select a different extruder for it. If you don't want to model your own, you can "misuse" the support blocker mesh like shown in this video (just select the other extruder instead of modifying any settings):

Willkommen @Stefan81! Die gcode-Dateien sind zwischen den beiden Druckern nicht austauschbar. Ist in Cura jeweils der richtige Drucker ausgewählt? Beim Start wird von der Firmware der Datei-"Header" ausgewertet (Kommentarzeilen am Anfang der gcode-Datei). Mindestens der Druckertyp, Printcore(s) und Materialauswahl müssen mit der Auswahl in Cura übereinstimmen. Im Zweifel kannst Du eine fragliche (Beispiel-) Datei auch hier hochladen, dann sieht man vielleicht, was damit nicht stimmt.

Standard threads are designed for traditional shape cutting and are quite a challenge for 3D printing in general (because of very steep overhangs that like to curl upwards). I think a small "fudge" factor is a good idea. Plastic threads usually need a bit higher tolerances than metal ones. There's a reason why trapezoidal and buttress threads are preferred for plastic parts. Your prints are looking a bit weird though. Like they are either printed with very thick layers or with activated experimental settings (like "Make overhangs printable"). All assuming that the bolts are printed in upright standing position...? What material is used? Take sure that you print those things with max. 0.1mm layer height (better 0.08), not too fast, with as much cooling (fan) as possible and without any tricks or supports. It's well doable this way - at least for thread diameters of 8mm or more.

Oh, da bin ich ein ganz schlechtes Beispiel, ich hab diese "Material-Wechsel"-Funktionen seit 2014 nicht mehr benutzt... 😃 (und die "normale" Tinker-Firmware seit dem Umbau auf Mark2 auch nicht mehr...) Beim Material-Laden könnte ich mir noch vorstellen, das im ersten Schritt nicht lange genug gewartet wird. Das neue Material sollte so ca. 20mm im Bowdenschlauch sichtbar sein (oberhalb vom Feeder), bevor man "Continue" auswählt. Aber wenn es beim Entfernen auch nicht komplett zurückgezogen wird, kann das ja nicht der einzige Grund sein...? Die Länge vom Bowden ändert sich ja beim Umbau nicht, außer für den UM2Go ist sie auch bei allen Firmware-Varianten gleich. Ich wechsle das Material meistens von Hand, oder mit der "Material-Move"-Funktion, das finde ich viel einfacher - vor allem, wenn der Drucker irgendwo steht, wo die Rückseite nicht so einfach zugänglich ist. Im Zweifelsfall würde ich einfach den Hebel am Feeder kurz nach oben ziehen und das fehlende Stück jeweils von Hand nachschieben / rausziehen. Kürzen würde ich da ganz sicher nichts. Es ist auch nicht ganz so einfach, den Bowdenschlauch sauber und genau rechtwinklich abzuschneiden (es gibt aber im "Thingiversum" diverse Vorrichtungen dafür). An der "Eingangsseite" (am Feeder) ist auch noch eine kleine Fase, die ohne das richtige Werkzeug nicht so einfach zu reproduzieren ist. Da fällt mir ein: bei der Montage also darauf achten, das die Enden vom Bowdenschlauch nicht vertauscht werden! Die Ersatz-Schläuche, die ich hier habe sind außerdem länger als sie laut Doku sein sollten (über 740 statt 705mm), da scheint es also auch Unterschiede zu geben (ich weiß allerdings nicht mehr, wo ich die gekauft habe - das kann also auch Absicht gewesen sein) 🤷‍♂️

AFAIK "Prime Blob" is only usable for newer Ultimaker printers (with gcode flavor "Griffin") - it uses a custom gcode command that is ignored by other printers. For all other printers such things are done in the start script. So the solution is: change the coordinates in the start script to take the reduced build area into account. If needed you can lookup all gcodes and parameters in the Marlin documentation.

This support page mentions all settings that have an influence on those "forbidden areas". It's still valid for the S5. https://ultimaker.com/en/resources/44677-maximum-build-volume-ultimaker-2-plus-ultimaker-3 Good luck!