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  • Posts

    • Sooo... You actually manage to get high successful rate when using the PVA as "interface support" only, the rest of the support being made with T-PLA ? Because I really won't exceed 60-70% of success when doing so, it tends to not stick the T-PLA for the floor unfortunately. It would help a LOT since it would reduce the PVA printing by 90% probably, reducing also the time, the scars left because of PrintCore changes, etc.   Never found proper advices / tips about it unfortunately.
    • Well it's definitely prettier than a lot of models I've tried to troubleshoot 🙂. Some observations: You put in a ChangeAtZ post-processor to speed up the top four layers? I can't think of any good reason to do that (but feel free to explain your reason, maybe it's just good and I couldn't think of it) I hope this thing doesn't collapse under its own weight at the top because there's no infill. But given how much filament infill would add, I can see why you'd want to avoid it. This thing is going to be weak. The kind of "pick it up from the bottom and cradle it when you move it" weak. Okay, done with the observations. Now the suggestions (and I might be using some of the more advanced settings here so if you can't see them, just search for them): Turn off Travel > Retract at Layer Change: At the extrusion distance and speed you're using, it's not going to be doing the retraction in then back out fast enough. Do this one. I mean it. Any stringing is going to be on the inside of the print, hidden, anyway. Turn off Experimental > Use Adaptive Layers. We want to get a consistent flow rate and adaptive makes it different for different layers. Seriously consider using two 0.6mm walls instead of a single 1.2mm wall: As well as Quality > Line Width, you're going to need to change Walls > Minimum Wall Line Width to 0.6mm and turn off Walls > Print Thin Walls It reduces the flow rate - that makes it easier for the printer to control the flow Retractions will be more effective since it only has to retract half as much filament (by volume) We can put the starting Z seams on the inside wall so if the problem is when it starts a line it'll be hidden. For that you'd need the following settings: Walls > Optimize Wall Printing Order turned on Walls > Wall Ordering set to Inside To Outside Experimental > Group Outer Walls turned off If the problem is when it ends a line, just use the the settings above but with Wall Ordering set to Outside To Inside If it has problems at both starts and ends, then obviously another fix needs to be found Yes, it'll take nearly twice as long to print. Slow print > bad print It'll make it marginally stronger. Like, just so little it's barely worth mentioning. But it's science! The thinner something is, the more likely it is to bend instead of break. PLA is pretty brittle so tends to default to "break"  and this probably won't change that, but I'm weird in that I subscribe to the "in theory, it'll help" way of thinking, not caring about the "in practice, it won't make a difference" part Turn down Speed > Travel Speed to 50mm/s. Filament can be a bit clingy, especially when you're extruding a lot more than someone on a 0.4mm nozzle would be, and I've seen travel speeds so high they've literally pulled parts of the model with them, making them warp I'll admit, this will likely make no difference. But your print has so few travels it barely adds anything to the print time so it can't hurt As @jaysenodell mentioned, you could set Walls > Z Seam Alignment to Random but that is sort of a cop out in that you might still have the problems, they just won't be nearly as noticeable because they're not all in one line. It will introduce a lot more travels but if there's any stringing, thanks to combing, Cura makes them all go around the hole in the middle, so they still won't be visible from the outside   %!&*ing hoons in their Commodores doing 80 in a 60 zone. Where's a cop when you need one?
    • I dont share this experience with PVA, I often print complex geometry parts which take several days with Ultimaker (T)PLA and PVA and it rarely fails. The only thing we have trouble with is when the printer unloads the material and reloads it again. Most of the time it then breaks somewhere within the bowden tube. I always cut the filament after it has unloaded to remove all material that has been through a bowden tube. Other problems are mostly because the spool has been within the material station for too long. A new spool generally solves the problem then. I don't tweak the print settings alot. Mostly infill type and density, print speed for (PLA up to 70mm/sec), core temperature, and bed adhesion type. For support I change to PVA when needed and then choose if all support is printed with PVA or only floor and roof. Other than these I tend to stick to the generic presets.   Maybe I'm still satisfied because I only have experience with Ultimaker 3 and S5, Bambulab X1E and Ender 5 Max and don't search for the limits of these printers.      
    • How the hell did you get that option before the 5.7 ? 😮
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