Very low acceleration during printing
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I'm running a speed test and trying 15K acceleration for infill print moves. X, Y, and E axes all have acceleration limit set to 15K, and print moves are set to 15K acceleration. The interface reports the correct settings. Printing speed is close to 300mm/s. It looks right in the slicer preview (PrusaSlicer). There's no minimum layer time set.
However, during printing it looks more like under 2000 acceleration. I can't figure out why.
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@MihaiDesigns check that acceleration is not limited by any M204 setting (slicers have a bad habit of putting these in, reducing all your accelerations) - send
M204
to see how it is currently set.Ian
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@MihaiDesigns It's likely as @droftarts has said but also check jerk - especially extruder jerk. You can set extruder jerk to silly high numbers and it won't have any adverse effect, but low extruder jerk will, especially if you use pressure advance.
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@droftarts yes, I did check M204 and the firmware reports it correctly. X, Y, and E are all set to 15K acceleration.
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@droftarts indeed it was the E jerk. I had it set to 4. I assumed a high E acceleration would take care of it, but it seems not.
Edit: For clarification, I meant 4mm/s, which is 240mm/min.
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E jerk can be set very high for most extruders. Try 3000 to 6000 mm/min.
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