I've printed and used Michael Hackney's extrusion measuring tool, tweaked my e-steps and it's now repeatable to +/- 0.1mm (99.9 to 100.1mm extruded for 100mm commanded). I did cut down the 180mm/m extrusion rate in the middle of his gcode to 120mm/m as I'm using ~3mm filament and at 180mm/m it was going a bit crinkly and curly.
Doing the temperature test using Mattforge PLA I don't see any appreciable difference over a 180-220C range so I've stuck with the manufacturers suggested 195C.
The results of the flow rate test is puzzling me though. I've seen lots of references on this forum to the E3D V6 flowing 10 mm^3/s but my results suggest something more like a touch under 4mm^3/s (the test in the image below goes from 10 at Z0 to 1 at the top (left).
I tried again with a 4(at Z0) to 1 range:
Which confirms the flow rate at ~3.5mm^3/s.... huh?
My nozzle is 0.5mm purchased directly from E3D and the Titan Aero is the Lulzbot Aerostruder version. No cloned parts. The filament is 2.80 diameter (checked with micrometer in several places and averaged; not a lot of variance).
I did change the filament width to 2.80 in the Matl tab and the extrusion width in the Wizard Temperature style to 0.5mm to match my nozzle and to check I mic'd the result.... which shows a wall thickness of 0.556 mm; not what I expected.
So I did a couple more experiments:
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Extrusion width with 0.5mm nozzle (Nozdia1) and 0.9 Nozlen1 (from E3D Drawing).
Diam Setting Flow Actual
2.85 0.5 1 0.558
2.80 0.5 1 0.566
2.80 0.5 0.88 0.5021
2.80 0.6 0.88 0.5954
However, I had to reduce the flow to 88% to get the 0.5mm wall thickness I'd set in KISSlicer. FWIW, I also tried setting 0.6 extrusion width and at 88% flow it was pretty close.
So.... can anyone suggest why my E3D V6 nozzle/Titan Extruder doesn't extrude at anywhere near the expected 10mm^3/s...
...and why the actual wall thickness is some 12% thicker than programmed? I really wasn't expecting to have to reduce the flow to 88%.
TIA.