Print speed and settings for printing below 0.1mm resolution on PLA I recently purchased an Anycubic Kossel Linear Plus delta printer, and I'm interested in trying to print slightly below the 0.1 mm stated lower limit of layer height. I'm not interested in trying to push much below 0.06 mm, more just 0.08 mm to give some better surface roughness on critical parts. 

I've found several articles that suggest that going below 0.1 mm requires lowering the printing speed, but the top answer on this question suggests that there are flow rates to consider in order to prevent jamming.

I'm referring to PLA in particular as I have read that the filament viscosity is also a factor, with ABS differing from PLA. 

I'm interested in some benchmark settings, preferably for 0.08 mm printing. What is the ballpark range my print speed should be in to successfully print at that height?
To answer this question for anyone who will find this of use, I printed this calibration cube at 25mm to a side (125% scale in Cura) with my Kossel Plus using the following settings:


0.08 mm layer height
45 mm/s print speed
200°C extruder temperature with PLA


Based on articles I read, I wanted to play it safe with the speed, staying well below the printer's rated speed of 60 mm/s, but still keeping the speed reasonably high to avoid any nozzle flow issues as describe in the linked question. The results were pretty good for a first test; the deviations, as measured with calipers:


X: -0.09 mm
Y: +0.38 mm
Z: +0.11 mm


This makes the average deviation across all axes about 0.13 mm, which is better than what I was hoping for, as that is about 5/3 of a layer's thickness. Whether or not running slower (or faster) or modifying temperature will result in better accuracy, I cannot be sure - but in this case, running the speed conservatively yielded positive results.