@Rene_Jurack here ya go… not bad for an acrylic framed Prusa i3 with an Aluminium Y Carriage, esentially at 270mm/s sliced at 180mm/s 100mm/s travel in S3D, but forgot I had it set to 150%… so yeah. In @colorFabb_Filament ’s NGEN #BOSS-challenge
What is your acceleration-setting?
Low, they shake themselves to bits else, they can’t handle much. 1590 or so off the top of my head.
Hmmm… But with this low acc settings, you never reach that high speeds. A straight line of 10mm will get you to like 130mm/s 
Placebo 
It is bettter to tell the real time it took to print the 3dbenchy imo.
I’ve just printed a 3DBenchy in 40 minutes. 0.4 nozzle, 0.2 layers, sliced in Cura @ 250mm/sec travel, 200mm/sec for the shells/top/bottom. Acceleration in Marlin is set to 8000 for X/Y. My X/Y/Z/E can keep up with that speed. But I get loud noises from the hot end. I’m using a genuine E3D V6 with a bowden setup, I think the PLA filament gets crushed in the hot end. What kind of hot ends are people using to reach those kind of speeds?
@Rene_Jurack , tbh that sort of speed for a Migbot is damn respectable. Still happy with it. Really need to tweak it again as it was set before I added in a a few more upgrades to them all, most notably, the aluminium Y carriage, so they could probably get quicker.
you need to adjust the temp… higher speeds = higher temp… And 250mm/s with 8000mm/s² acc is not 40 mins… more like 20 mins…
I think I loose a lot of time retracting/z hopping, my geared extruder is pretty slow in that respect. I printed the 3DBenchy with 0.8mm vertical/horizontal shells / 25% infill. What did you use?
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