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Ultimaker 2 VS Ultimaker 3 - Speed Problem

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Hi there,

I´m wondering why the Ultimaker 3 is so slow in comparison to my other Ultimaker 2. I have compare the settings of the UM3/UM2 and some settings are higher in the UM3 than in UM2...but the UM3 takes 7hours longer on the same model as on the UM2.

The UM2 runs with 50mm/s and the UM3 with 70mm/s printing speed for example...and all other settings are also lower on the UM2...but the print took 7 hours(!!) faster!

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Does this include switching nozzles as the accumulated time of switching can add up.

If single nozzle then check the acceleration and jerk setting on UM3. As it's a heavier print head these are normally a bit slower then UM2 which can mean that sometimes the head never reaches the stated print speed.

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There's no faster or slower slicer. Just machines that are slower or faster

UM2/UM2+ has a hotend much smaller and lightweight than UM3. So In order to print better Cura team made Acceleration/Jerk control so the areas that ain't visible (infill, some inner perimeters, etc) print at the fastest possible speed, while the Perimeters (the part the user actually can see) print at 500/5 jerk, making the print slower, but keeping the quality and removing the ringing effect that comes from sudden changes of speed on the printhead.

So, UM2 can print faster, and UM3 to print with the same (with UM3 Cura profiles it actually prints better than um2) it prints slower.

S3D doesn't do this tricks by default, but they are very easily implemented by copy/paste some script on the Profile


I did send this easy script to S3D but since they have the most horrible support team ever, they didn't even thing about checking it. They 'know'. You know, that's what happens when you don't have a engineer degree people directly assume you can't be right, but ofc that doesn't happens only with S3D team...


Again, there's no faster/slower slicers. Just better or worse settings. Cura is very fine tuned to use the printhead and double extrusion as best as possible. I don't agree on some of the tricks used, but that doesn't matter since it can print fine. Unless ofc you want to make something transparent with their default profiles, or you actually care about the precision of the extrusion or the way retractions are handled.

But again, Cura can click-print much better than S3D.

S3D is a program that doesn't care about what machine is in, and the user must be the one making the best possible for each print. The advantage ofc, is that since there's no hidden options or automatic stuff, you can actually control almost every single aspect of the print. But, that's not for the new user.

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