Printed the ultimaker drill in a diy dual extrusion ultimaker 2 with ooz shield. Bc lack of time I have to scale down the model to 40% or so. Sliced in cura 3.0.3 with .15 layer height，1.75 filaments and two nozzle setup. The overall quality was satisfied^_^
How are you running dual extrusion? Magnetic tool changer? Y splitter? Or did you just mount two hotends to a custom carriage?
@Adam_Steinmark my guess it second extruder, just bc there is no wipe tower, and the wall is mostly blue whereas the object is mostly white
@Matthew_Del_Rosso I’m assuming you mean second hotend? There has to be second extruder regardless, unless he’s using the one that uses 2 idlers and switches between them. I would agree, without a wipe tower it’s definitely not a Y splitter.
@Adam_Steinmark ya sorry, I meant hotend
@Adam_Steinmark @Matthew_Del_Rosso I’m so glad you’ve noticed there was no purge tower here :). This is exactly why I’m so proud to show to you guys !
So no, not like a Y splitter. It has two nozzles and 2-in-2-out approach. But not like two fixed nozzles with same z-height. Not like what UM3 is doing ( one lift up/down respect to another). Not like UM2 mark2 doing ( a magnetic tool changer). Not like BCN sigma doing (a dual x-carriage). It’s some sort of switching.
I’m doing this from an obvious idea since last fall. Bc I came up with this idea before UM3 released out maybe that’s why I could think it differently. But I definitely influenced by those wonderful ideas and implementations such as the @Ultimaker1 UM3 style switching and @Markus_Seidt (and many other people) magnetic tool changer and also @Richard_Horne 's preview video on his preferred way to do the switch. Those are simply wonderful ideas!
Please forgive me to keep it a secret right now. But eventually I want to make it open as much as I can.
Right now I’m trying to test it’s reliability. Please stay tuned for upcoming results!
So many questions. Guess I’ll have to wait.
Using Cura’s, actually very smart, pre-heating logic one can avoid purge towers with most “standard”, not excessively dripping filaments. But looks impresive anyhow. Curious to know the details.
Reminds me… I have been meaning to print this…
@Markus_Seidt I’m not sure what setup you’re referring to because with a Y splitter you still need a purge tower to ensure a clean color change between filaments. If you’re talking about the ooze shield it’s not heating of the idle hotend that causes the need for an ooze shield, it’s the cooling of the one that was just printed.
@Adam_Steinmark I’m referring to the magnetic tool changer I came up with or more “standard” two nozzle approaches like Ultimaker oder BCN3D. If retraction is high enough you can avoid dripping of the nozzle which cools down. Cura even lets you specify a minimum temp for extrusion, this will make the the nozzle already start to cool down within this temp window during the last sec of a layer (ofc this can be questioned regarding layer adhesion etc.).
@Markus_Seidt Ah I didn’t realize you were the designer of that. Yeah that was part of the reasoning for making my current build IDEX, mostly being able to print water soluble supports with more than just PLA.
@Markus_Seidt @Adam_Steinmark In my case ooz only affects the heating process. Not a few, but definitely affects the print quality. Is it possible to set how early (in seconds for example) the preheating starts in cura?
@raykholo It was fun to print this 
@Xiaojun_Liu you can set a heatup rate (°C per sec) and a starting print temp. Cura will use both together with the estimated printing time of each layer to start heating the idling nozzle at a certain time.
@Markus_Seidt OK. I’ll try！
looking good.
@Richard_Horne watching your last videos I learned we share the same opinion about purge towers, ooze shields etc. IHMO nozzle wiping can be designed way better than the standard rubber/silicone blades or brushes which allways bare the risk of just wiping filament strands from one side of the nozzle to the other.