Can the Mks+ print at very high speed?  

RE: Can the Mks+ print at very high speed?

The modifications, it can print at similar speeds but this usually gives up quality,  

RE: Can the Mks+ print at very high speed?

As Chuck says, it's largely a question of print quality. I find quality starts to suffer before speed limitations become an issue. Speed is an illusion. If you want prints to finish faster, the amount of plastic you put down matters more than how fast the nozzle zips around.

The super-fast setups are interesting, but let's face it: FFF printing is pretty primitive. Seeing how resin printers work has me thinking FFF is nearing obsolescence. This reminds me of the "super fast" dot matrix printers in the 1980s. People paid thousands and they went obsolete in a flash.

RE: Can the Mks+ print at very high speed?

Very true. Glue stick gun with moving x,y,z planes.

RE: Can the Mks+ print at very high speed?

Out of curiosity, I just did a quick test using PrusaSlicer as a simulator. Using the Prusa Mk3 preset, I created a print settings preset that used 250mm/s for all speeds. I sliced a 200mm^3 cube.

• Using the Prusa Mk3, Prusament PLA, and 0.2mm QUALITY profiles with default speeds through a 0.4mm nozzle, the print time estimate is 4d13h27.
• Using the Prusa Mk3, Prusament PLA, and 0.2mm QUALITY profiles with 250mm/s speeds through a 0.4mm nozzle, the print time estimate is 4d0h8m.

The significant changes come when you change the printer machine limits.

• Increasing feedrates to 900mm/s, acceleration to 9000mm/s^2, and jerk to 20mm/s drops print time using the 250mm/s speed settings to 1d16h46m.

So it's really a question of how badly you're willing to beat up the hardware and still call it "good". Even with blue-sky hardware settings, a print of over 24h is still too damn long for such an error-prone process. A larger nozzle is really the key to reducing print times.

• Using the Prusa Mk3, Prusament PLA, and 0.2mm QUALITY profiles with default speeds through a 0.8mm nozzle, the print time estimate is 1d20h44m.

So using Prusa's default machine limits, I can reduce print times to near(er) those of the "ultrafast" setup just by using a larger nozzle and normal speeds. Start doing further optimization, and times get better:

• Using the Prusa Mk3, Prusament PLA, and 0.4mm layer height profiles with default speeds through a 0.8mm nozzle, the print time estimate is 1d5h40m.

Now these are just slicer estimates, but I find they're usually within 10-20%. I don't mean to downplay the efforts of the speed tweaking community, but I'm just not impressed by a clunky FFF process that still takes over a day to print what is, after all, just a stupid little 8 inch cube. I really don't care how fast the little nozzle zips around, and I'm aware of the ghosting and other print artifacts that have to be dealt with, particularly slapping a big heavy bed around. I can get reasonable enough results just optimizing the hardware and software I have with normal printer speeds while we wait for whatever the next generation of 3D printing products looks like. Some of the tweaks are of interest if they can be done simply and reliably without major upgrades, but that's about the limit of my interest.

YMMV and all of this is IMO, of course.