First color in left extruder and Second color is set in right extruder.
In my opinion, filaments won’t be combined since 2 filaments are separated into different extruders.
So I don’t need to set Prime Tower enabled when printing with just 2 colors?
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The tower helps the nozzle build pressure before working on the part, it’s still required for a clean print
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In a recent interview, Dr Tao (CEO), said this will hopefully be fixed in a future version of Bambu Studio.
It does seem annoyingly required for now.
You can turn it off, but you results may vary.
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Thank you so much!!!
Thanks for such a great extra information!!!
Looking forward to seeing that update!!
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I tried printing a small, 2 color model with no prime tower, and it was very bad. you might get away with no tower, if the model has a lot of surface area, but for small models, its a must
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Yes. I don’t think a multi nozzle print with no prime tower would be even possible to consistently make high quality prints. It doesn’t make sense. For many might think that you only need to wipe the nozzle on the wiper… No it’s not that simple. You might make something similar with extra hardware though.
To rebuild the stable pressure (the same pressure as normal printing), the nozzle would need to:
- have something to press on. It cannot get pressure back to normal if it’s purging in air.
- print at normal speeds while pressing on that base. Can’t be too fast or slow either.
There is no such thing in H2D that can do this. To do this you need to:
- Have some very flat surface that allows the nozzle to consistently press on and print on it
- be able to clean itself and remove the printed lines consistently, so that it doesn’t build up on the nozzle or end up on the plate.
It requires a significant change mechanically. I don’t see how it’s possible with our current hardwares.
Prime tower, in general, it’s the only object that is as filament efficient as possible, and as reliable as possible, for this purpose…
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That may have been your experience, but in reality, it isn’t required.
The printer swapping the filaments and starting to print another single clean layer is more than enough to maintain quality without the entirely unnecessary prime tower.
This swapping can swap filaments each layer without any issues.
Many of the models I publish on MakerWorld use the identical technique, all come out perfectly on my printer and those who choose to print them.
I suspect your problem was something unique to your model.
Surface area isn’t the deciding factor.
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I use print by object a lot when printing things in color and it never prints a prime tower and everything comes out fine but I imagine it depends on the print.
it highly depends on the size of model and print area for each filament. but it is still very risky to print without prime tower because of the ooze.
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And yet, it isn’t. Hundreds of models would beg to differ.
Experience proves otherwise.
I completely disagree. Do you actually think layers with not even 2 seconds of extrusion time for one of the nozzles will properly print? The first 3 layers of the teeth have like 2 seconds of extrusion, there is no way you can get a clean print without a prime tower. The only way to do this would be to force the infill to use the white filament I guess…
Why would you not read what I wrote before replying to something I didn’t say?
None of those are clean layers where one colour occupies one layer and another occupies a different layer.
One colour per layer.
Had I said it is never needed, you could correct me, but I didn’t, I am not sure why you wish to correct something never said.
you should have said a single color layer… or better yet, ‘a layer with one color’ … what does a clean layer mean? glad you cleared that up.
Just because you didn’t understand it doesn’t mean it was wrong.
You didn’t ask me to explain things if you didn’t understand them, or to provide examples, you attacked me.
There are ways to get clean prints without having a prime tower, even if there is more than one colour per layer.
Practice will get you there. I wasn’t rude to you, I asked questions.
Why, there was nothing wrong with the term I used? You not understanding it doesn’t mean it was wrong.
Try asking questions in the forum rather than attacking.
This “in my experience” vs “I completely disagree”, probably the same sentiment, but two different approaches.
ok, can you provide some examples of models with a single clean layer? Also, how did I attack you LOL. I was just asking questions
I completely disagree.
You could have said, “In my experience.”
Do you actually think layers with not even 2 seconds of extrusion time for one of the nozzles will properly print?
Your tone.
The first 3 layers of the teeth have like 2 seconds of extrusion, there is no way you can get a clean print without a prime tower.
Your tone and the presumption that it is impossible.
The only way to do this would be to force the infill to use the white filament I guess…
You then provide a suggestion, making your previous statement seem strange, essentially arguing with yourself.
You could have said.
“In my experience, this is not possible. If you look at this model, which I printed without a prime tower, the results were not great. How would this be possible with what you suggested?”
It would then have let me know we were talking about two different things, and I could have cleared something up.
Tone and what you say are important.
I know one designer who rarely uses prime towers even when 4+ colours are used in the same layer. It is possible, it just takes experience and lots of testing.
One of my more popular models:
It has many profiles, all using more than one colour; each layer has only one colour before a new one is introduced. I do this in part so those without an AMS can also enjoy the styles I produce.
This more recent one has a special profile version that disables the prime tower and yet prints without issues despite changing filaments 22 times. This was despite having two very different, contrasting colours. You will observe no bleed between the two colours in the photos and no artefacts. Infill wasn’t used for the other colour during swaps either.
It can be done, it is being done by more than just me.
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I use is only by very small models.
By bigger models it looks way better for me without prime tower.
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You don’t think this is condescending?
I can’t help the fact that you are objectively wrong.
It has everything to do with the surface area of the layer. even if the entire layer is a “single clean layer” with one color. That’s a fact. there is no way around this.
Everyone else in this thread agrees. Why can’t you just admit you are wrong and move on? instead you say I’m attacking you 
The models you posted have a large layer surface area so of course they will print fine. You have yet to prove me wrong, and are trying to spread bad info.
The key factor in determining if a prime tower is needed is the layer’s surface area. End of discussion.
How?
And yet I demonstrated otherwise.
Nope.
No one else commented about what I said except you.
It is you who keeps stating wrong things.
Expect the second one doesn’t, it has less coverage than the shark model you showed with teeth. The purple sections start and stop, and are tiny in comparison. The purple areas that swap with white have barely any filament; there is no large surface area that you speak of.
Wrong.
I do hope so.