Dim3nsioneer

Filled out. :-P I had to fill out all questions, also those which were actually not applicable. btw: the UM transporter drone would have been sooooo cooooool....! :cool:

Guys, for the case you don't know the plugin: RetractWhileCombing might give you what you want when filled with the right numbers...

@aviphysics: You won't regret it... :-P

"Forget it if it happens once. If it happens twice, it's a question. If it happens three times, it's an answer..." Peter Sauber, former head of the Sauber Formula 1 team about technical problems. Could be extended to missing parts maybe?

Here you go for the best http://ethicalfamilyplanning.com/img/ovulation_spike.jpg... :lol:

It is nice... since V3.1.x, see here...

Check 'main features' in the menu on the left...

Naja, immerhin hast Du's schon. Ich will es seit längerem bestellen... :rolleyes:

It should be like that, yes. If the plugin doesn't behave that way, could you please report it to me? As a matter of fact, I could only perform dry runs (means without a physical UM2) when implementing the UltiGCode. Be aware that you have to put in the height or layer number on which you want the printer to start with the new settings and not the previous layer.

Yes, there is...

Ist zwar jetzt nicht ganz genau eine Antwort auf Deine Frage, aber vielleicht hilft's trotzdem: Ich habe Colorfabb nach der Lebensmittelsicherheit von _XT, einem PET-ähnlichen Stoff gefragt. Die Antwort war, dass das Material an sich problemlos sei und es in einem All-Metall-Hotend auch bleibe. Bei Hotends, die PEEK oder PTFE beinhalten sei diese Unbedenklichkeit also nicht mehr gewährleistet. Daraus würde ich jetzt schliessen, dass gedruckte Teile nicht unbedingt als Spielsachen für Kleinkinder geeignet sind. Das heisst aber nicht, dass gegossene Spielsachen immer besser sind in dieser Hinsicht. Gerade das, was aus China kommt (und das ist heutzutage ja nicht gerade wenig), bleibt immer mal wieder bei einer Kontrolle hängen. Und dann gibt's natürlich noch das Thema, dass an einem gedruckten Teil eher mal etwas wegbrechen kann (Verschluckungsgefahr) als an einem gegossenen Teil.

Und dann hast Du Silicagel o.ä. unter dem Ablaufgitter?

Because you obviously have an UM2 and the (very reasonable) setting 'UltiGCode' for the 'flavour' in the machine settings (cf. my post above).

But you have to make sure that combing is enabled. If you don't you get 'Het Wilhelmus' a bit below the point you indicated.

I would also say, try it. You certainly need a brim or raft. Recently, I've made a print with free-standing walls of 0.8mm thickness (just flat walls, no edges, no bends). It worked. You may have to keep vibrations in mind. They may affect the print quality higher up in the print. It's certainly an issue with an UM1, maybe less with an UM2 (due to the difference in stepper driving).

It makes no sense to equip the z axis with a 1/32 microstepping driver as it is limited to 1/8 steps (due to good reasons such as movement precision). The extruders are actually the worst in terms of noise, that's true. However, decoupling the feeder motor is for me the right way to go.

You may disable combing in Cura (expert settings). Then you'll get retraction on all layers. If you want retraction on the first layer only you may use the RetractionWhileCombing plugin (to be found in the UM Wiki, wiki.ultimaker.com).

Yes to all...

Oops... I missed the detail that you have an UM2. There is no coupler between motor and z screw. The z screw is part of the motor itself. Maybe the motor itself has come loose?

The bed levelling is ok? Maybe you could do a one layer print and post a picture here?

Sounds to me like the coupler of the z axis and the z motor has come loose...

Ok, I have now DRV8825s installed on the x and the y axis. I set them to a current around 0.8A (I even measured VRef). It's enough for running the printer smoothly without skipping but not enough if you try to stop the print head. I doubled the number of steps/mm. Right now my UM1 draws circles with 8cm diameter at a speed of 150mm/s. No problem at all. Seems the ATMEL is fast enough. However, after all what was written about noise I expected the motors to be less noisy. I have the (very subjective) impression that they are louder than the original ultimaker stepper drivers.

Schau unbedingt die Eintellung der Schrittmotortreiber an. Die korrekte Einstellung ist bei einem Drittel des gesamten Einstellungs-Spielraumes, wie http://wiki.ultimaker.com/Electronics_build_guidegezeigt. Ich vermute mal, dass Du die blauen Treiber hast, die abgebildet sind. Da musst Du darauf achten, dass diese im Gegenuhrzeigersinn von wenig Strom nach viel Strom eingestellt werden! Wenn der Treiber nämlich zu hoch eingestellt ist, dann kann es auch zu einer Art Stottern wegen teilweiser Überhitzung kommen (Das ist mir kürzlich passiert und das Ergebnis war -1 Schrittmotortreiber).

Ultimaker Original oder Ultimaker2? Beim UM Original gibt es diesen Effekt nachdem ein Print während des Aufwärmens abgebrochen wird. Einfach einmal ausschalten und wieder einschalten (Achtung; unbedingt auch USB unterbrechen!)

This could be done with a Cura plugin / Gcode for the Ulticontroller. Might be a bit more difficult for the print dialog.