You CAN'T use two different size nozzles in the same print!

Bambu Lab H2D
1

According to the 3D Printer Nerd first look video, astonishingly, you CANNOT use two different sized nozzles in the same 3D print.

Absolute dealbreaker.

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Did he state why? Like it mechanically can’t? or is it just a firmware/slicer upgrade coming down the line.

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It was my hope to use 0.2 for details and a 0.6 for speed…

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Not really, no. Maybe it will be available due to a future firmware update, but the fact that it’s not available right out of the box absolutely blows my mind.

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Sounds like it will be available in the future per the faqs.

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Probably requires a good amount of software coding to get it to work, and its not implemented it any other slicers (as far as i know) so they cant just copy and paste.

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This is probably a lot more complicated to do than it sounds if for no other reason than you’d typically use different layer heights for different size nozzles. It would be relatively easy if you had a limitation that for each layer only one sized nozzle can be used but you just know people wouldn’t like that restriction. So the next restriction would be that only one layer height could be used per layer in which case you just know someone’s going to put a 0.2 and 0.8 in the machine at the same time and have a bad experience. But if you completely open it up and allow different layer heights on a single layer you’ve then got to worry about hopping over the different heights during travel moves.

So I’m not at all shocked by this limitation, I’d probably be more surprised if they allowed it.

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I am far from an engineer/coder. But what more would you need to know besides:

  • Height in steps from the bed to the top of whatever the last layer printed was
  • Clearance the tip of the nozzles to the underside of the extruder enclosure

Non planar printing is already totally possible with the X1C. You are severely limited by the distance between the nozzle tip and the body of the extruder enclosure, but it’s been done already and the distance it had to clear is much more than the layer height difference between the max that a .8 can do and the minimum that a .2 can do.

EDIT: if this is possible then I wonder what makes two different nozzles with one print so difficult:

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Is bambuslicer 2.0 out yet? May be why it doesnt work yet, if so

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Yes, it’s out

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I’m assuming the main problem is that you cannot have different layer heights, otherwise you risk the printing nozzle colliding with the higher layers.

You may be able to get around this by always using the retractable nozzle with the smaller layer heights, building up that one first, then using the fixed nozzle with larger layers second.

So if you are putting down 0.2mm layers and 0.6mm layers (as just an example), you build up 3 layers at 0.2, then you throw down 0.6mm layers. At the end of that layer, you are all even again.

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Prusa slicer already has a setting that uses double layer thickness for infill. You can also print .2mm layers with any nozzle. Gotta be just that they havnt added the ability in the slicer yet.

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Yep, realized there is a way you can handle it.

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Agree. My follow-up post acknowledged the mistake.

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Womp womp

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I assume there isn’t any physical limitation here. I just don’t think they have the ability to handle it programmatically yet. I assume this is a feature that should be able to do in the future, they were already behind on releasing this (originally schedule for last year), so they probably didn’t want to delay it further.

I expect this to be coming in the future. (Unless I am oblivious to a physical limitation, which could be possible, but I doubt it.)

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Technically if you could set extrusion width per nozzle you can put in a larger nozzle and set the extrusion width to that size. Too bad that setting is global for both nozzles, otherwise the slicer can handle it. Maybe someone will write a script to combine two sliced files into 1.

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Im down. Pitch forks ready! lol. I imagine by the time i can and actually want different sized nozzles, there will have already have been a slicer update for it. Remember when the x1 and p1 were loud as hell and then we got a noise cancelling firmware update? Hopefully we will see updates like that again.

They probably just didnt want to push the release back again. And this is a function that you cant just use an open sourced fix for

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the documentation does have the word “currently” so it might be possible in the future, but yeah I won’t hold my breath. anywho already bought

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Hoping this ability in firmware would come soon. I’m getting it mainly for support in one nozzle and main filament in the other.