@UnknowX said in formbot troodon 400 with spider v1 board and klipper:
.......................... My hot-end is a takoto and capable of these speeds.
I guess "pretty good quality" is a subjective thing - it's not the phrase I would use to describe the attached images. That aside, it would be interesting to see a video of the machine printing at 700mm/sec. But assuming for a moment that you can move the print head at such speeds, in order to attain that speed, you'll need very high accelerations - especially with the short moves on an object such as that toy boat. Whilst it is possible to accelerate a print head in 3D space at such accelerations, it is highly unlikely that the flow rate of the highly viscous molten filament being forced through a small orifice can be accelerated at the same rate as the print head. It's basic physics and no amount of tuning or tweaking is going to fix it.