Open n8bot opened 1 year ago
You should share your project file, because I can't reproduce this with default Mini 0.20 SPEED profile. It seems to behave as it should.
1 mm^3/s^2
Note that the requested feedrate of 80 mm/s is achieved around this point where the nozzle is shown. (Ignore the fact that the feedrate fluctuates -- this is due to single precision float usage instead of double precision. Easy fix.)
Note that the requested feedrate of 180 mm/s is never achieved. Not even 80 mm/s is achieved by the time the infill starts to "decelerate" due to the pressure equalizer. (Ignore the fact that the deceleration phase is abrupt -- this is due to the lookback value of 128. Expected.)
If the acceleration is equivalent, then both toolpaths should achieve 80 mm/s at close to the same spot in the infill.
I suspect that the acceleration rate is greatly reduced because the "time estimate" used by the pressure equalizer to determine the acceleration rate is not quite right. I haven't confirmed this, just a suspicion.
Okay, yeah, important discovery: this happens on Prusament PLA, but not on Prusament PETG @ MINI profile due to max volumetric speed. I forgot to even check actual speed reached, was only looking at volumetric speed view.
Description of the bug
Pressure equalizer says it takes mm^3/s^2. However, when the feedrate is increased, the pressure equalizer dramatically reduces the allowed volumetric acceleration.
Project file & How to reproduce
Load up any print profile, and set slopes to 1 mm^3/s^2. Slice, notice the print time, and the speed visualization. Then, increase the infill speed to something like 180 mm/s. Notice that the print time is actually LONGER.
The infill will now take longer to hit the same feedrate as before.
Checklist of files included above
Version of PrusaSlicer
2.5.0
Operating system
win 10
Printer model
any prusa profile