Any real XL prints/reviews?  

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Prusa XL Two Toolheads. Unboxing and build

RE: Any real XL prints/reviews?

Just got my dual tool head . Here’s a print that was down defaulted with multi material , Prusaslicer automatically adds a wipe tower which was completely not needed . Couple of quick settings and re-sliced printed exactly the same with now issues . So far the multi material tool head swapping has been great . 

RE: Any real XL prints/reviews?

Posted by: @georg-4

Prusa XL Two Toolheads. Unboxing and build

Nice video.  I can't wait to get mine.  Thanks for sharing the video.  

RE: Any real XL prints/reviews?

How bad is this?  That’s only 200mm/s and it looks awful after 140mm/s - how is this acceptable?  I recently acquired an AnkerMake M5 and it prints standard at 250mm/s and in fast mode at 500mm/s and the prints look amazing. 

I know it’s not like for like but come on, surely this is not what is expected in 2023 given the speeds the competition are printing at?

I am confident that it will print faster than I can design.  I rarely worry about the look of the print but if it matters I can sand and paint as usual.  Reliability and strong parts are the important thing.  If a print takes a couple of days, so what? It's working when I am not, so the ability to start a multimaterial print and forget about it is the main selling point.

Cheerio,

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The M5 is not a toolchanger, is it? You can build a non-tool changer considerably lighter as it doesn't need to be as complex. Higher mass, means more impact on high speeds. Also in 2023. If you want max speed, the single toolhead XL is a bad choice, because it is designed for multitoolheads nonetheless. 

However if you couldn't care less about printing at 150 or even 250 mm/s it doesn't make as much difference. Because if speed is not your prime concern but robustness of the printed parts, you will realize that printing at such high speeds will compromise robustness, also on an M5 or X1 and also in 2023. Others which want max speed rather than max robustness might be better off not buying a printer designed for tool changing. 

RE: Any real XL prints/reviews?

PS: I'd really love to see how much the M5 is actually limited by its hotend design. 500 mm/s on a 0.4 mm nozzle at 0.2 mm layer height means a whopping flow rate of 40 mm^3/s max. Granted, Such high speeds are probably mostly theoretical as you are probably limited more by acceleration at that point rather than max speed but still. 40 mm^3/s is a flow rate at which many dedicated high flow hotends with CHT nozzle are already starting to struggle. We know that the X1 is actually pushing its hotend beyond its capabilities at fast settings, I wouldn't be surprised if the M5 is doing so too. 

RE: Any real XL prints/reviews?

The M5 does appear to be a single head printer with a print volume of 235×235×250 mm³.  

Posted by: @thejiral

PS: I'd really love to see how much the M5 is actually limited by its hotend design. 500 mm/s on a 0.4 mm nozzle at 0.2 mm layer height means a whopping flow rate of 40 mm^3/s max. Granted, Such high speeds are probably mostly theoretical as you are probably limited more by acceleration at that point rather than max speed but still. 40 mm^3/s is a flow rate at which many dedicated high flow hotends with CHT nozzle are already starting to struggle. We know that the X1 is actually pushing its hotend beyond its capabilities at fast settings, I wouldn't be surprised if the M5 is doing so too. 

RE: Any real XL prints/reviews?

Aren't we expecting a huge speed increase when input shaping is ready?  It's a shame it couldn't ship with it, but considering the difference it makes on the MK4, I'd expect the XL to catch right up with the competition's speeds (except probably without crossing over to matte prints and weak layer adhesion on standard settings).

RE: Any real XL prints/reviews?

Yes, higher speeds with fully implemented input shaping should be possible, even if weight is a bit higher. It has to be seen up to which speeds quality will still be ok. I would expect however that also for the XL flow rate limitations will be the actual bottle neck then, rather than kinematics. 

If it can be as fast as smaller single toolhead printers which are pushed to their absolute max has to be seen. I do think however, that this is a rather theoretical question of limited significance for people buying the toolchanger for getting a plug and print tool changer. There is none other on the market to my knowledge, not one that is plug and print at least. 

RE: Any real XL prints/reviews?

 Josef Průša mentioned on Facebook that they are working on a high-flow nozzle. Maybe that, along with the 0,6mm nozzle and the input shaping will make the XL just as fast... Just more reliable.

RE: Any real XL prints/reviews?

I am interested to see this nozzle or hotend.  I have used the Mk4 with input shaping so far, and I am impressed with the strength of the results.  I have not strength tested but they have survived my limited testing.  

Posted by: @dvillalba3d

 Josef Průša mentioned on Facebook that they are working on a high-flow nozzle. Maybe that, along with the 0,6mm nozzle and the input shaping will make the XL just as fast... Just more reliable.

RE: Any real XL prints/reviews?

That would be indeed a very important update. Given the size of the XL, a 0.6 mm nozzle is the natural choice but printing with one at even close to the speeds mentioned above leeds to very high flow rates which are definitely beyond the capabilities of regular hotends. Will it be just a HF nozzle are a modified hotend as well, with extended heater zone?

Printing with a 0.6 mm nozzle at 0.2 mm layer height and 100 mm/s is pushing a regular hotend setup already to its limit (12 mm/s is the max flow rate one should target for a regular V6 nozzle, leaving some safety margin, according to Prusa). That should demonstrate that max flow rate is just as important as some theoretical speeds which everyone is talking about nowadays. If not more important. 

RE: Any real XL prints/reviews?

RE: Any real XL prints/reviews?

I do hope they also make a HF harden steel...

RE: Any real XL prints/reviews?

I woke up yesterday to an air printing object, with a clog so bad I couldn't load filament or remove the clog with a could of nozzle round trips to a heat gun.  So I pulled out the free adapter and found a .6 CHT nozzle in the drawer I'd forgotten.  So I installed that and I'm printing again.  I don't know exactly which settings i'm supposed to use to take advantage (set higher max flow rate in the filament settings, and then try increasing speeds?).  Don't want to veer too far off topic, just thought it was relevant since it just came up in this thread.  At least my hotend wasn't held hostage by the clog, and I guess I can work on the nozzle some more with no pressure.  I have to have a print done for a trip next week and I didn't want to have to pull the nozzle from my MK4 🙂 

RE: Any real XL prints/reviews?

Posted by: @dvillalba3d

I do hope they also make a HF harden steel...

With the adapter you can use a hardened CHT nozzle which should be performing similarily to a hardened revo nozzle. 
From the response it does seem however that no special volcano like HF-hotend is planned wich one could combine with such a nozzle. Still, the special nozzle should be able to push max flow rate at least a bit. 

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^^ a small correction. I meant to say that the hardened CHT nozzle should show a similar performance to a hardened high flow revo nozzle ... if such a Revo nozzle existed already, that is. 

RE: Any real XL prints/reviews?

Have you tried a welding rod to remove it?  I heat the nozzle or hotend up with a heat gun and push the clog out with a 1.5-1.7 mm welding rod.  

Posted by: @darksharpie

I woke up yesterday to an air printing object, with a clog so bad I couldn't load filament or remove the clog with a could of nozzle round trips to a heat gun.  So I pulled out the free adapter and found a .6 CHT nozzle in the drawer I'd forgotten.  So I installed that and I'm printing again.  I don't know exactly which settings i'm supposed to use to take advantage (set higher max flow rate in the filament settings, and then try increasing speeds?).  Don't want to veer too far off topic, just thought it was relevant since it just came up in this thread.  At least my hotend wasn't held hostage by the clog, and I guess I can work on the nozzle some more with no pressure.  I have to have a print done for a trip next week and I didn't want to have to pull the nozzle from my MK4 🙂 

RE: Any real XL prints/reviews?

Ahh I tried something similar with an old bass guitar string but the welding rod idea sounds much better for the pressure i could apply. I'll give that a shot thanks.