Cosik Technicznie: Extruder comparison part 1

Over the time I was searching for some good and relatively cheap Extruder. My journey with 3D printing started years ago when Anet A6 was a Queen of budget machine with crappy Extruder. Next machin which is still alive is my heavily modified HEVO. With this printer my another journey with Extruder starts.

Bowden Extruders.

At the beginning world of lightweight and compact Extruders doesn't exist. They were very heavy and bulky. Regarding to that most popular were bowden Extruders. My first one was Mobius 2 by Voron Design. This design is very power full and many time it just tear out PTFE tubes from push fittings.

Next natural upgrade was swithing to Mobius 3 also by Voron Design. And again powerfull construction.

My last bowden extruder was Rappel by Annex-Engineering mounted at the top of my HEVO enclosure.

With those Extruders after tweaking I was able to achieve retraction level below 2mm. When I compare those values even with direct drive on Enders it is unavailable low value.

Direct drive Extruders.

Over the time direct drive Extruders became more compact and fancy so natural way was to go with them as upgrade for my HEVO. I test many of them before I decide to create this set of articles, so not all of them will be here.

Testing procedure.

Preconditions

PA is disabled by default
The same filament is used whole the time
The same temperature is used during each test
Using Road runner filament sensor as measurement device

Test setup.

JAYO PLA+ filament
Ender3 V3 SE/KE hot end with 0.4 mm nozzle
klipper firmware
Motor ldo-36sth20-1004ahg

Test steps.

Mount Extruder
Calibrate Extruder steps
Perform Road runner flow test
Inconsistent Extrusion Test using always the same gcode

Calibrate Extruder steps.

After changing each Extruder, steps are calibrated and updated. Using command

CALIBRATE_FILAMENT_SENSOR_ROTATION_DISTANCE SENSOR=roadrunner TEMP=220 LENGTH=10 SPEED=60 COUNT=10 MIN_FITNESS=0.988

Even if calibration of Road runner is not perfect, the same measurement error will be applied for all tested extruders.

Perform flow test.

Flow test was executed with enabled save graph flag.

CALIBRATE_MAX_FLOW SENSOR=roadrunner DURATION=5 COUNT=3 TEMP=220 START=5 STOP=25 SAVE_GRAPH=1 MIN_FITNESS=0.988

Firmware Extruder configuration.

[tmc2209 extruder]
interpolate: true
sense_resistor: 0.110
run_current: 0.52
driver_TBL: 2
driver_TOFF: 2
driver_HEND: 7
driver_HSTRT: 7

[autotune_tmc extruder]
tuning_goal: performance
motor: ldo-36sth20-1004ahg
voltage: 24
extra_hysteresis: 0
tbl: 2
toff: 2

List of tested Extruders in order.

Miró
Dletgbs
ProtoXtruderNX
ProtoXtruder - mixed enforced version this and this
Tsunami
ProtoXtruder 2.1

Results

Miró

Assuming non-linear extrusion compensation is enabled, a maximum volumetric flow up to 21.021869mm³/s is suggested which will keep E speed below 8.74mm/s (which corresponds to 10.21mm/s after compensation). If the extruder is unable to reliably sustain this speed, lowering the max volumetric flow further is recommended.
Compensation coefficients: [-1.05179799  1.78440879 -0.1697739   0.0129294 ].
Enable with: ENABLE_NONLINEAR_EXTRUSION SENSOR=roadrunner ENABLE=1 COEFFICIENTS=-1.0517980,1.7844088,-0.1697739,0.0129294
Assuming no non-linear extrusion compensation, a conservative volumetric flow of 11.999999999999998mm³/s is suggested which will keep E speed below 4.99mm/s and the deviation from requested speed within a margin of 5.0%.

Full log

Heater turned off

Saved CALIBRATE_MAX_FLOW_measured_vs_expected_speed_20251223_091121.png

Assuming non-linear extrusion compensation is enabled, a maximum volumetric flow up to 21.021869mm³/s is suggested which will keep E speed below 8.74mm/s (which corresponds to 10.21mm/s after compensation). If the extruder is unable to reliably sustain this speed, lowering the max volumetric flow further is recommended.

Compensation coefficients: [-1.05179799 1.78440879 -0.1697739 0.0129294 ].

Enable with: ENABLE_NONLINEAR_EXTRUSION SENSOR=roadrunner ENABLE=1 COEFFICIENTS=-1.0517980,1.7844088,-0.1697739,0.0129294

Assuming no non-linear extrusion compensation, a conservative volumetric flow of 11.999999999999998mm³/s is suggested which will keep E speed below 4.99mm/s and the deviation from requested speed within a margin of 5.0%.

Run 1/3 - requested=51.97mm (at speed=10.36mm/s, flow=24.91mm³/s), measured=42.65mm in 5.03 seconds (at speed=8.67mm/s, flow=20.86mm³/s) = 16.54% speed deviation

Run 2/3 - requested=51.97mm (at speed=10.36mm/s, flow=24.92mm³/s), measured=43.66mm in 5.03 seconds (at speed=8.76mm/s, flow=21.07mm³/s) = 15.71% speed deviation

Run 3/3 - requested=51.97mm (at speed=10.36mm/s, flow=24.92mm³/s), measured=43.38mm in 5.13 seconds (at speed=8.78mm/s, flow=21.13mm³/s) = 15.48% speed deviation

Run 1/3 - requested=49.89mm (at speed=9.96mm/s, flow=23.96mm³/s), measured=42.83mm in 4.93 seconds (at speed=8.69mm/s, flow=20.90mm³/s) = 12.90% speed deviation

Run 2/3 - requested=49.89mm (at speed=9.94mm/s, flow=23.90mm³/s), measured=42.47mm in 5.03 seconds (at speed=8.57mm/s, flow=20.61mm³/s) = 14.14% speed deviation

Run 3/3 - requested=49.89mm (at speed=9.94mm/s, flow=23.91mm³/s), measured=41.60mm in 5.03 seconds (at speed=8.48mm/s, flow=20.40mm³/s) = 14.98% speed deviation

Run 1/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.92mm³/s), measured=41.78mm in 5.04 seconds (at speed=8.46mm/s, flow=20.34mm³/s) = 11.55% speed deviation

Run 2/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.93mm³/s), measured=42.01mm in 5.03 seconds (at speed=8.41mm/s, flow=20.23mm³/s) = 12.04% speed deviation

Run 3/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.93mm³/s), measured=41.33mm in 5.03 seconds (at speed=8.36mm/s, flow=20.11mm³/s) = 12.55% speed deviation

Run 1/3 - requested=45.73mm (at speed=9.11mm/s, flow=21.91mm³/s), measured=40.46mm in 5.03 seconds (at speed=8.19mm/s, flow=19.71mm³/s) = 10.43% speed deviation

Run 2/3 - requested=45.73mm (at speed=9.11mm/s, flow=21.92mm³/s), measured=40.59mm in 5.03 seconds (at speed=8.23mm/s, flow=19.79mm³/s) = 10.04% speed deviation

Run 3/3 - requested=45.73mm (at speed=9.12mm/s, flow=21.92mm³/s), measured=40.91mm in 5.03 seconds (at speed=8.23mm/s, flow=19.79mm³/s) = 10.03% speed deviation

Run 1/3 - requested=43.65mm (at speed=8.69mm/s, flow=20.90mm³/s), measured=38.67mm in 5.03 seconds (at speed=7.89mm/s, flow=18.98mm³/s) = 9.63% speed deviation

Run 2/3 - requested=43.65mm (at speed=8.69mm/s, flow=20.90mm³/s), measured=39.41mm in 5.03 seconds (at speed=7.91mm/s, flow=19.02mm³/s) = 9.42% speed deviation

Run 3/3 - requested=43.65mm (at speed=8.69mm/s, flow=20.91mm³/s), measured=39.13mm in 5.03 seconds (at speed=7.94mm/s, flow=19.10mm³/s) = 9.04% speed deviation

Run 1/3 - requested=41.58mm (at speed=8.29mm/s, flow=19.93mm³/s), measured=37.76mm in 5.13 seconds (at speed=7.58mm/s, flow=18.24mm³/s) = 8.82% speed deviation

Run 2/3 - requested=41.58mm (at speed=8.29mm/s, flow=19.93mm³/s), measured=37.90mm in 5.13 seconds (at speed=7.54mm/s, flow=18.14mm³/s) = 9.29% speed deviation

Run 3/3 - requested=41.58mm (at speed=8.27mm/s, flow=19.90mm³/s), measured=37.12mm in 5.03 seconds (at speed=7.51mm/s, flow=18.07mm³/s) = 9.66% speed deviation

Run 1/3 - requested=39.50mm (at speed=7.87mm/s, flow=18.92mm³/s), measured=36.07mm in 5.03 seconds (at speed=7.28mm/s, flow=17.50mm³/s) = 7.90% speed deviation

Run 2/3 - requested=39.50mm (at speed=7.87mm/s, flow=18.92mm³/s), measured=35.93mm in 5.13 seconds (at speed=7.26mm/s, flow=17.45mm³/s) = 8.15% speed deviation

Run 3/3 - requested=39.50mm (at speed=7.87mm/s, flow=18.93mm³/s), measured=35.98mm in 5.03 seconds (at speed=7.28mm/s, flow=17.52mm³/s) = 7.78% speed deviation

Run 1/3 - requested=37.42mm (at speed=7.46mm/s, flow=17.95mm³/s), measured=34.33mm in 5.03 seconds (at speed=6.94mm/s, flow=16.69mm³/s) = 7.29% speed deviation

Run 2/3 - requested=37.42mm (at speed=7.46mm/s, flow=17.95mm³/s), measured=34.06mm in 5.03 seconds (at speed=6.90mm/s, flow=16.60mm³/s) = 7.77% speed deviation

Run 3/3 - requested=37.42mm (at speed=7.46mm/s, flow=17.95mm³/s), measured=34.38mm in 5.03 seconds (at speed=6.94mm/s, flow=16.69mm³/s) = 7.27% speed deviation

Run 1/3 - requested=35.34mm (at speed=7.06mm/s, flow=16.99mm³/s), measured=32.64mm in 5.03 seconds (at speed=6.60mm/s, flow=15.89mm³/s) = 6.55% speed deviation

Run 2/3 - requested=35.34mm (at speed=7.06mm/s, flow=16.99mm³/s), measured=32.69mm in 4.93 seconds (at speed=6.62mm/s, flow=15.92mm³/s) = 6.33% speed deviation

Run 3/3 - requested=35.34mm (at speed=7.05mm/s, flow=16.95mm³/s), measured=32.69mm in 4.93 seconds (at speed=6.61mm/s, flow=15.90mm³/s) = 6.49% speed deviation

Run 1/3 - requested=33.26mm (at speed=6.64mm/s, flow=15.96mm³/s), measured=30.95mm in 5.03 seconds (at speed=6.23mm/s, flow=14.98mm³/s) = 6.40% speed deviation

Run 2/3 - requested=33.26mm (at speed=6.64mm/s, flow=15.96mm³/s), measured=31.09mm in 5.03 seconds (at speed=6.23mm/s, flow=14.98mm³/s) = 6.37% speed deviation

Run 3/3 - requested=33.26mm (at speed=6.64mm/s, flow=15.96mm³/s), measured=30.54mm in 5.13 seconds (at speed=6.20mm/s, flow=14.92mm³/s) = 6.77% speed deviation

Run 1/3 - requested=31.18mm (at speed=6.22mm/s, flow=14.96mm³/s), measured=28.85mm in 5.03 seconds (at speed=5.85mm/s, flow=14.07mm³/s) = 6.19% speed deviation

Run 2/3 - requested=31.18mm (at speed=6.22mm/s, flow=14.96mm³/s), measured=29.07mm in 5.03 seconds (at speed=5.84mm/s, flow=14.05mm³/s) = 6.33% speed deviation

Run 3/3 - requested=31.18mm (at speed=6.22mm/s, flow=14.96mm³/s), measured=28.80mm in 5.03 seconds (at speed=5.84mm/s, flow=14.06mm³/s) = 6.28% speed deviation

Run 1/3 - requested=29.10mm (at speed=5.80mm/s, flow=13.95mm³/s), measured=26.88mm in 5.04 seconds (at speed=5.51mm/s, flow=13.26mm³/s) = 5.29% speed deviation

Run 2/3 - requested=29.10mm (at speed=5.80mm/s, flow=13.95mm³/s), measured=27.25mm in 5.03 seconds (at speed=5.49mm/s, flow=13.22mm³/s) = 5.60% speed deviation

Run 3/3 - requested=29.10mm (at speed=5.80mm/s, flow=13.96mm³/s), measured=27.38mm in 5.03 seconds (at speed=5.48mm/s, flow=13.18mm³/s) = 5.84% speed deviation

Run 1/3 - requested=27.02mm (at speed=5.39mm/s, flow=12.96mm³/s), measured=25.55mm in 5.03 seconds (at speed=5.12mm/s, flow=12.32mm³/s) = 5.22% speed deviation

Run 2/3 - requested=27.02mm (at speed=5.39mm/s, flow=12.96mm³/s), measured=25.83mm in 5.03 seconds (at speed=5.14mm/s, flow=12.37mm³/s) = 4.87% speed deviation

Run 3/3 - requested=27.02mm (at speed=5.40mm/s, flow=12.98mm³/s), measured=25.37mm in 5.03 seconds (at speed=5.15mm/s, flow=12.39mm³/s) = 4.67% speed deviation

Run 1/3 - requested=24.95mm (at speed=4.97mm/s, flow=11.96mm³/s), measured=23.63mm in 5.03 seconds (at speed=4.76mm/s, flow=11.46mm³/s) = 4.50% speed deviation

Run 2/3 - requested=24.95mm (at speed=4.97mm/s, flow=11.96mm³/s), measured=23.63mm in 5.03 seconds (at speed=4.76mm/s, flow=11.45mm³/s) = 4.60% speed deviation

Run 3/3 - requested=24.95mm (at speed=4.97mm/s, flow=11.96mm³/s), measured=23.63mm in 5.03 seconds (at speed=4.76mm/s, flow=11.44mm³/s) = 4.67% speed deviation

Run 1/3 - requested=22.87mm (at speed=4.56mm/s, flow=10.96mm³/s), measured=21.62mm in 5.03 seconds (at speed=4.36mm/s, flow=10.48mm³/s) = 4.71% speed deviation

Run 2/3 - requested=22.87mm (at speed=4.56mm/s, flow=10.96mm³/s), measured=21.67mm in 5.03 seconds (at speed=4.36mm/s, flow=10.49mm³/s) = 4.68% speed deviation

Run 3/3 - requested=22.87mm (at speed=4.56mm/s, flow=10.96mm³/s), measured=21.71mm in 5.03 seconds (at speed=4.37mm/s, flow=10.52mm³/s) = 4.35% speed deviation

Run 1/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.95mm³/s), measured=19.98mm in 4.93 seconds (at speed=4.04mm/s, flow=9.72mm³/s) = 2.76% speed deviation

Run 2/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.96mm³/s), measured=19.93mm in 5.03 seconds (at speed=4.05mm/s, flow=9.73mm³/s) = 2.65% speed deviation

Run 3/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.96mm³/s), measured=19.66mm in 5.03 seconds (at speed=3.99mm/s, flow=9.59mm³/s) = 4.14% speed deviation

Run 1/3 - requested=18.71mm (at speed=3.73mm/s, flow=8.97mm³/s), measured=17.74mm in 5.03 seconds (at speed=3.59mm/s, flow=8.63mm³/s) = 4.12% speed deviation

Run 2/3 - requested=18.71mm (at speed=3.73mm/s, flow=8.98mm³/s), measured=18.01mm in 5.03 seconds (at speed=3.58mm/s, flow=8.62mm³/s) = 4.26% speed deviation

Run 3/3 - requested=18.71mm (at speed=3.72mm/s, flow=8.96mm³/s), measured=17.60mm in 5.03 seconds (at speed=3.59mm/s, flow=8.65mm³/s) = 3.94% speed deviation

Run 1/3 - requested=16.63mm (at speed=3.31mm/s, flow=7.96mm³/s), measured=16.05mm in 5.03 seconds (at speed=3.19mm/s, flow=7.68mm³/s) = 3.99% speed deviation

Run 2/3 - requested=16.63mm (at speed=3.31mm/s, flow=7.96mm³/s), measured=15.82mm in 5.13 seconds (at speed=3.23mm/s, flow=7.78mm³/s) = 2.77% speed deviation

Run 3/3 - requested=16.63mm (at speed=3.31mm/s, flow=7.96mm³/s), measured=16.27mm in 5.03 seconds (at speed=3.25mm/s, flow=7.81mm³/s) = 2.40% speed deviation

Run 1/3 - requested=14.55mm (at speed=2.89mm/s, flow=6.96mm³/s), measured=13.85mm in 5.03 seconds (at speed=2.84mm/s, flow=6.82mm³/s) = 2.55% speed deviation

Run 2/3 - requested=14.55mm (at speed=2.89mm/s, flow=6.96mm³/s), measured=13.99mm in 5.03 seconds (at speed=2.85mm/s, flow=6.85mm³/s) = 2.20% speed deviation

Run 3/3 - requested=14.55mm (at speed=2.90mm/s, flow=6.96mm³/s), measured=14.31mm in 5.03 seconds (at speed=2.84mm/s, flow=6.83mm³/s) = 2.44% speed deviation

Run 1/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.11mm in 5.03 seconds (at speed=2.44mm/s, flow=5.86mm³/s) = 2.31% speed deviation

Run 2/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.02mm in 5.03 seconds (at speed=2.41mm/s, flow=5.80mm³/s) = 3.37% speed deviation

Run 3/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.11mm in 5.04 seconds (at speed=2.46mm/s, flow=5.92mm³/s) = 1.34% speed deviation

Run 1/3 - requested=10.39mm (at speed=2.06mm/s, flow=4.96mm³/s), measured=10.19mm in 5.04 seconds (at speed=2.10mm/s, flow=5.05mm³/s) = 1.02% speed deviation

Run 2/3 - requested=10.39mm (at speed=2.06mm/s, flow=4.96mm³/s), measured=10.24mm in 5.03 seconds (at speed=2.09mm/s, flow=5.03mm³/s) = 0.55% speed deviation

Run 3/3 - requested=10.39mm (at speed=2.06mm/s, flow=4.96mm³/s), measured=10.15mm in 5.04 seconds (at speed=2.03mm/s, flow=4.87mm³/s) = 2.55% speed deviation

Dletgbs

Assuming non-linear extrusion compensation is enabled, a maximum volumetric flow up to 18.238827mm³/s is suggested which will keep E speed below 7.58mm/s (which corresponds to 8.58mm/s after compensation). If the extruder is unable to reliably sustain this speed, lowering the max volumetric flow further is recommended.
Compensation coefficients: [-0.42031994  1.47740002 -0.13464719  0.01271045].
Enable with: ENABLE_NONLINEAR_EXTRUSION SENSOR=roadrunner ENABLE=1 COEFFICIENTS=-0.4203199,1.4774000,-0.1346472,0.0127104
Assuming no non-linear extrusion compensation, a conservative volumetric flow of 20.0mm³/s is suggested which will keep E speed below 8.32mm/s and the deviation from requested speed within a margin of 5.0%.

Full log

Heater turned off

Saved CALIBRATE_MAX_FLOW_measured_vs_expected_speed_20251223_212134.png

Assuming non-linear extrusion compensation is enabled, a maximum volumetric flow up to 18.724039mm³/s is suggested which will keep E speed below 7.78mm/s (which corresponds to 8.67mm/s after compensation). If the extruder is unable to reliably sustain this speed, lowering the max volumetric flow further is recommended.

Compensation coefficients: [-0.66375761 1.63077321 -0.18471127 0.01659579].

Enable with: ENABLE_NONLINEAR_EXTRUSION SENSOR=roadrunner ENABLE=1 COEFFICIENTS=-0.6637576,1.6307732,-0.1847113,0.0165958

Assuming no non-linear extrusion compensation, a conservative volumetric flow of 20.0mm³/s is suggested which will keep E speed below 8.32mm/s and the deviation from requested speed within a margin of 5.0%.

Run 1/3 - requested=51.97mm (at speed=10.38mm/s, flow=24.97mm³/s), measured=39.31mm in 5.13 seconds (at speed=7.77mm/s, flow=18.69mm³/s) = 25.23% speed deviation

Run 2/3 - requested=51.97mm (at speed=10.36mm/s, flow=24.92mm³/s), measured=38.40mm in 5.03 seconds (at speed=7.78mm/s, flow=18.70mm³/s) = 25.19% speed deviation

Run 3/3 - requested=51.97mm (at speed=10.36mm/s, flow=24.92mm³/s), measured=39.41mm in 5.13 seconds (at speed=7.81mm/s, flow=18.78mm³/s) = 24.89% speed deviation

Run 1/3 - requested=49.89mm (at speed=9.95mm/s, flow=23.93mm³/s), measured=40.27mm in 5.03 seconds (at speed=7.80mm/s, flow=18.77mm³/s) = 21.80% speed deviation

Run 2/3 - requested=49.89mm (at speed=9.95mm/s, flow=23.93mm³/s), measured=39.68mm in 5.03 seconds (at speed=7.99mm/s, flow=19.21mm³/s) = 19.95% speed deviation

Run 3/3 - requested=49.89mm (at speed=9.96mm/s, flow=23.96mm³/s), measured=39.63mm in 5.04 seconds (at speed=7.82mm/s, flow=18.80mm³/s) = 21.67% speed deviation

Run 1/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.92mm³/s), measured=39.54mm in 5.03 seconds (at speed=7.89mm/s, flow=18.97mm³/s) = 17.54% speed deviation

Run 2/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.92mm³/s), measured=39.50mm in 5.03 seconds (at speed=7.83mm/s, flow=18.84mm³/s) = 18.11% speed deviation

Run 3/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.93mm³/s), measured=40.14mm in 5.03 seconds (at speed=7.96mm/s, flow=19.14mm³/s) = 16.77% speed deviation

Run 1/3 - requested=45.73mm (at speed=9.12mm/s, flow=21.92mm³/s), measured=39.59mm in 5.03 seconds (at speed=7.99mm/s, flow=19.22mm³/s) = 12.63% speed deviation

Run 2/3 - requested=45.73mm (at speed=9.12mm/s, flow=21.93mm³/s), measured=39.68mm in 5.13 seconds (at speed=8.01mm/s, flow=19.27mm³/s) = 12.39% speed deviation

Run 3/3 - requested=45.73mm (at speed=9.13mm/s, flow=21.96mm³/s), measured=39.73mm in 4.93 seconds (at speed=8.12mm/s, flow=19.52mm³/s) = 11.27% speed deviation

Run 1/3 - requested=43.65mm (at speed=8.70mm/s, flow=20.93mm³/s), measured=40.69mm in 5.03 seconds (at speed=8.28mm/s, flow=19.92mm³/s) = 5.13% speed deviation

Run 2/3 - requested=43.65mm (at speed=8.71mm/s, flow=20.96mm³/s), measured=40.14mm in 5.03 seconds (at speed=8.16mm/s, flow=19.62mm³/s) = 6.56% speed deviation

Run 3/3 - requested=43.65mm (at speed=8.70mm/s, flow=20.92mm³/s), measured=40.14mm in 5.03 seconds (at speed=8.03mm/s, flow=19.32mm³/s) = 8.02% speed deviation

Run 1/3 - requested=41.58mm (at speed=8.28mm/s, flow=19.92mm³/s), measured=40.64mm in 5.03 seconds (at speed=8.23mm/s, flow=19.80mm³/s) = 1.00% speed deviation

Run 2/3 - requested=41.58mm (at speed=8.28mm/s, flow=19.92mm³/s), measured=40.00mm in 5.03 seconds (at speed=8.03mm/s, flow=19.33mm³/s) = 3.37% speed deviation

Run 3/3 - requested=41.58mm (at speed=8.29mm/s, flow=19.93mm³/s), measured=40.00mm in 5.13 seconds (at speed=8.13mm/s, flow=19.55mm³/s) = 2.27% speed deviation

Run 1/3 - requested=39.50mm (at speed=7.87mm/s, flow=18.93mm³/s), measured=38.99mm in 5.03 seconds (at speed=7.83mm/s, flow=18.83mm³/s) = 0.90% speed deviation

Run 2/3 - requested=39.50mm (at speed=7.87mm/s, flow=18.93mm³/s), measured=38.86mm in 5.13 seconds (at speed=7.83mm/s, flow=18.84mm³/s) = 0.83% speed deviation

Run 3/3 - requested=39.50mm (at speed=7.88mm/s, flow=18.95mm³/s), measured=38.81mm in 5.03 seconds (at speed=7.82mm/s, flow=18.82mm³/s) = 0.97% speed deviation

Run 1/3 - requested=37.42mm (at speed=7.48mm/s, flow=17.99mm³/s), measured=36.75mm in 5.04 seconds (at speed=7.46mm/s, flow=17.95mm³/s) = 0.29% speed deviation

Run 2/3 - requested=37.42mm (at speed=7.47mm/s, flow=17.96mm³/s), measured=36.94mm in 5.03 seconds (at speed=7.44mm/s, flow=17.90mm³/s) = 0.57% speed deviation

Run 3/3 - requested=37.42mm (at speed=7.47mm/s, flow=17.96mm³/s), measured=36.98mm in 5.03 seconds (at speed=7.42mm/s, flow=17.85mm³/s) = 0.85% speed deviation

Run 1/3 - requested=35.34mm (at speed=7.05mm/s, flow=16.96mm³/s), measured=34.79mm in 5.03 seconds (at speed=7.05mm/s, flow=16.96mm³/s) = 0.22% speed deviation

Run 2/3 - requested=35.34mm (at speed=7.05mm/s, flow=16.97mm³/s), measured=35.11mm in 5.03 seconds (at speed=7.06mm/s, flow=16.98mm³/s) = 0.12% speed deviation

Run 3/3 - requested=35.34mm (at speed=7.06mm/s, flow=16.99mm³/s), measured=34.70mm in 5.03 seconds (at speed=7.07mm/s, flow=17.00mm³/s) = 0.02% speed deviation

Run 1/3 - requested=33.26mm (at speed=6.65mm/s, flow=15.99mm³/s), measured=32.50mm in 5.03 seconds (at speed=6.62mm/s, flow=15.92mm³/s) = 0.49% speed deviation

Run 2/3 - requested=33.26mm (at speed=6.65mm/s, flow=15.99mm³/s), measured=32.87mm in 5.03 seconds (at speed=6.64mm/s, flow=15.96mm³/s) = 0.24% speed deviation

Run 3/3 - requested=33.26mm (at speed=6.64mm/s, flow=15.96mm³/s), measured=33.01mm in 5.03 seconds (at speed=6.65mm/s, flow=15.99mm³/s) = 0.06% speed deviation

Run 1/3 - requested=31.18mm (at speed=6.22mm/s, flow=14.97mm³/s), measured=30.77mm in 5.03 seconds (at speed=6.21mm/s, flow=14.94mm³/s) = 0.37% speed deviation

Run 2/3 - requested=31.18mm (at speed=6.22mm/s, flow=14.96mm³/s), measured=31.13mm in 5.04 seconds (at speed=6.24mm/s, flow=15.00mm³/s) = 0.01% speed deviation

Run 3/3 - requested=31.18mm (at speed=6.23mm/s, flow=14.99mm³/s), measured=30.54mm in 5.03 seconds (at speed=6.22mm/s, flow=14.95mm³/s) = 0.30% speed deviation

Run 1/3 - requested=29.10mm (at speed=5.82mm/s, flow=13.99mm³/s), measured=28.66mm in 5.03 seconds (at speed=5.81mm/s, flow=13.98mm³/s) = 0.12% speed deviation

Run 2/3 - requested=29.10mm (at speed=5.80mm/s, flow=13.96mm³/s), measured=28.75mm in 5.13 seconds (at speed=5.80mm/s, flow=13.94mm³/s) = 0.43% speed deviation

Run 3/3 - requested=29.10mm (at speed=5.81mm/s, flow=13.96mm³/s), measured=28.94mm in 5.03 seconds (at speed=5.81mm/s, flow=13.97mm³/s) = 0.20% speed deviation

Run 1/3 - requested=27.02mm (at speed=5.39mm/s, flow=12.97mm³/s), measured=26.88mm in 5.03 seconds (at speed=5.38mm/s, flow=12.94mm³/s) = 0.44% speed deviation

Run 2/3 - requested=27.02mm (at speed=5.40mm/s, flow=12.98mm³/s), measured=26.65mm in 5.03 seconds (at speed=5.38mm/s, flow=12.95mm³/s) = 0.42% speed deviation

Run 3/3 - requested=27.02mm (at speed=5.40mm/s, flow=12.98mm³/s), measured=26.51mm in 5.03 seconds (at speed=5.42mm/s, flow=13.03mm³/s) = 0.26% speed deviation

Run 1/3 - requested=24.95mm (at speed=4.97mm/s, flow=11.96mm³/s), measured=24.78mm in 5.03 seconds (at speed=4.98mm/s, flow=11.97mm³/s) = 0.21% speed deviation

Run 2/3 - requested=24.95mm (at speed=4.97mm/s, flow=11.96mm³/s), measured=24.64mm in 5.03 seconds (at speed=4.98mm/s, flow=11.98mm³/s) = 0.19% speed deviation

Run 3/3 - requested=24.95mm (at speed=4.97mm/s, flow=11.97mm³/s), measured=24.69mm in 5.13 seconds (at speed=4.98mm/s, flow=11.98mm³/s) = 0.15% speed deviation

Run 1/3 - requested=22.87mm (at speed=4.56mm/s, flow=10.98mm³/s), measured=22.54mm in 4.93 seconds (at speed=4.57mm/s, flow=10.99mm³/s) = 0.08% speed deviation

Run 2/3 - requested=22.87mm (at speed=4.57mm/s, flow=10.98mm³/s), measured=22.49mm in 5.03 seconds (at speed=4.55mm/s, flow=10.95mm³/s) = 0.47% speed deviation

Run 3/3 - requested=22.87mm (at speed=4.56mm/s, flow=10.96mm³/s), measured=22.54mm in 5.03 seconds (at speed=4.55mm/s, flow=10.94mm³/s) = 0.54% speed deviation

Run 1/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.96mm³/s), measured=20.43mm in 5.13 seconds (at speed=4.12mm/s, flow=9.90mm³/s) = 1.02% speed deviation

Run 2/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.96mm³/s), measured=20.80mm in 5.13 seconds (at speed=4.16mm/s, flow=9.99mm³/s) = 0.05% speed deviation

Run 3/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.97mm³/s), measured=20.94mm in 5.13 seconds (at speed=4.17mm/s, flow=10.02mm³/s) = 0.22% speed deviation

Run 1/3 - requested=18.71mm (at speed=3.73mm/s, flow=8.98mm³/s), measured=18.29mm in 5.03 seconds (at speed=3.74mm/s, flow=9.00mm³/s) = 0.03% speed deviation

Run 2/3 - requested=18.71mm (at speed=3.72mm/s, flow=8.96mm³/s), measured=18.83mm in 5.03 seconds (at speed=3.78mm/s, flow=9.10mm³/s) = 1.15% speed deviation

Run 3/3 - requested=18.71mm (at speed=3.73mm/s, flow=8.96mm³/s), measured=18.42mm in 5.03 seconds (at speed=3.74mm/s, flow=8.98mm³/s) = 0.17% speed deviation

Run 1/3 - requested=16.63mm (at speed=3.31mm/s, flow=7.96mm³/s), measured=16.82mm in 5.03 seconds (at speed=3.35mm/s, flow=8.06mm³/s) = 0.73% speed deviation

Run 2/3 - requested=16.63mm (at speed=3.31mm/s, flow=7.96mm³/s), measured=16.23mm in 5.03 seconds (at speed=3.31mm/s, flow=7.97mm³/s) = 0.41% speed deviation

Run 3/3 - requested=16.63mm (at speed=3.31mm/s, flow=7.96mm³/s), measured=16.82mm in 5.03 seconds (at speed=3.30mm/s, flow=7.94mm³/s) = 0.75% speed deviation

Run 1/3 - requested=14.55mm (at speed=2.90mm/s, flow=6.97mm³/s), measured=14.58mm in 4.93 seconds (at speed=2.95mm/s, flow=7.11mm³/s) = 1.51% speed deviation

Run 2/3 - requested=14.55mm (at speed=2.90mm/s, flow=6.98mm³/s), measured=14.17mm in 5.03 seconds (at speed=2.92mm/s, flow=7.03mm³/s) = 0.49% speed deviation

Run 3/3 - requested=14.55mm (at speed=2.89mm/s, flow=6.96mm³/s), measured=14.35mm in 5.03 seconds (at speed=2.89mm/s, flow=6.96mm³/s) = 0.58% speed deviation

Run 1/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.66mm in 5.03 seconds (at speed=2.50mm/s, flow=6.02mm³/s) = 0.39% speed deviation

Run 2/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.85mm in 5.03 seconds (at speed=2.52mm/s, flow=6.07mm³/s) = 1.08% speed deviation

Run 3/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.62mm in 5.03 seconds (at speed=2.47mm/s, flow=5.94mm³/s) = 1.07% speed deviation

Run 1/3 - requested=10.39mm (at speed=2.06mm/s, flow=4.96mm³/s), measured=10.56mm in 5.03 seconds (at speed=2.09mm/s, flow=5.02mm³/s) = 0.47% speed deviation

Run 2/3 - requested=10.39mm (at speed=2.06mm/s, flow=4.96mm³/s), measured=10.42mm in 5.03 seconds (at speed=2.06mm/s, flow=4.95mm³/s) = 1.05% speed deviation

Run 3/3 - requested=10.39mm (at speed=2.06mm/s, flow=4.96mm³/s), measured=10.61mm in 5.03 seconds (at speed=2.10mm/s, flow=5.05mm³/s) = 1.01% speed deviation

ProtoXtruderNX

Assuming non-linear extrusion compensation is enabled, a maximum volumetric flow up to 18.724039mm³/s is suggested which will keep E speed below 7.78mm/s (which corresponds to 8.67mm/s after compensation). If the extruder is unable to reliably sustain this speed, lowering the max volumetric flow further is recommended.
Compensation coefficients: [-0.66375761  1.63077321 -0.18471127  0.01659579].
Enable with: ENABLE_NONLINEAR_EXTRUSION SENSOR=roadrunner ENABLE=1 COEFFICIENTS=-0.6637576,1.6307732,-0.1847113,0.0165958
Assuming no non-linear extrusion compensation, a conservative volumetric flow of 20.0mm³/s is suggested which will keep E speed below 8.32mm/s and the deviation from requested speed within a margin of 5.0%.

Full log

Saved CALIBRATE_MAX_FLOW_measured_vs_expected_speed_20251223_133523.png

Assuming non-linear extrusion compensation is enabled, a maximum volumetric flow up to 18.238827mm³/s is suggested which will keep E speed below 7.58mm/s (which corresponds to 8.58mm/s after compensation). If the extruder is unable to reliably sustain this speed, lowering the max volumetric flow further is recommended.

Compensation coefficients: [-0.42031994 1.47740002 -0.13464719 0.01271045].

Enable with: ENABLE_NONLINEAR_EXTRUSION SENSOR=roadrunner ENABLE=1 COEFFICIENTS=-0.4203199,1.4774000,-0.1346472,0.0127104

Run 1/3 - requested=51.97mm (at speed=10.38mm/s, flow=24.97mm³/s), measured=37.62mm in 4.94 seconds (at speed=7.55mm/s, flow=18.16mm³/s) = 27.37% speed deviation

Run 2/3 - requested=51.97mm (at speed=10.38mm/s, flow=24.97mm³/s), measured=38.22mm in 5.03 seconds (at speed=7.46mm/s, flow=17.93mm³/s) = 28.27% speed deviation

Run 3/3 - requested=51.97mm (at speed=10.38mm/s, flow=24.97mm³/s), measured=38.35mm in 5.04 seconds (at speed=7.74mm/s, flow=18.63mm³/s) = 25.49% speed deviation

Run 1/3 - requested=49.89mm (at speed=9.95mm/s, flow=23.93mm³/s), measured=39.54mm in 4.93 seconds (at speed=7.91mm/s, flow=19.03mm³/s) = 20.71% speed deviation

Run 2/3 - requested=49.89mm (at speed=9.96mm/s, flow=23.96mm³/s), measured=39.95mm in 5.03 seconds (at speed=7.96mm/s, flow=19.15mm³/s) = 20.23% speed deviation

Run 3/3 - requested=49.89mm (at speed=9.96mm/s, flow=23.96mm³/s), measured=39.82mm in 5.14 seconds (at speed=7.88mm/s, flow=18.95mm³/s) = 21.04% speed deviation

Run 1/3 - requested=47.81mm (at speed=9.55mm/s, flow=22.97mm³/s), measured=40.05mm in 5.03 seconds (at speed=8.09mm/s, flow=19.46mm³/s) = 15.37% speed deviation

Run 2/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.92mm³/s), measured=38.77mm in 5.03 seconds (at speed=8.06mm/s, flow=19.39mm³/s) = 15.68% speed deviation

Run 3/3 - requested=47.81mm (at speed=9.53mm/s, flow=22.93mm³/s), measured=39.31mm in 5.03 seconds (at speed=7.87mm/s, flow=18.94mm³/s) = 17.67% speed deviation

Run 1/3 - requested=45.73mm (at speed=9.13mm/s, flow=21.96mm³/s), measured=39.77mm in 5.04 seconds (at speed=8.10mm/s, flow=19.49mm³/s) = 11.39% speed deviation

Run 2/3 - requested=45.73mm (at speed=9.13mm/s, flow=21.96mm³/s), measured=39.45mm in 5.04 seconds (at speed=7.89mm/s, flow=18.97mm³/s) = 13.79% speed deviation

Run 3/3 - requested=45.73mm (at speed=9.13mm/s, flow=21.96mm³/s), measured=37.76mm in 5.14 seconds (at speed=7.81mm/s, flow=18.80mm³/s) = 14.56% speed deviation

Run 1/3 - requested=43.65mm (at speed=8.70mm/s, flow=20.93mm³/s), measured=40.78mm in 5.03 seconds (at speed=8.18mm/s, flow=19.68mm³/s) = 6.30% speed deviation

Run 2/3 - requested=43.65mm (at speed=8.71mm/s, flow=20.96mm³/s), measured=38.67mm in 5.03 seconds (at speed=7.92mm/s, flow=19.05mm³/s) = 9.31% speed deviation

Run 3/3 - requested=43.65mm (at speed=8.71mm/s, flow=20.96mm³/s), measured=37.67mm in 4.83 seconds (at speed=7.96mm/s, flow=19.15mm³/s) = 8.81% speed deviation

Run 1/3 - requested=41.58mm (at speed=8.28mm/s, flow=19.92mm³/s), measured=39.31mm in 5.04 seconds (at speed=7.97mm/s, flow=19.17mm³/s) = 4.13% speed deviation

Run 2/3 - requested=41.58mm (at speed=8.28mm/s, flow=19.93mm³/s), measured=39.91mm in 5.14 seconds (at speed=7.97mm/s, flow=19.18mm³/s) = 4.10% speed deviation

Run 3/3 - requested=41.58mm (at speed=8.28mm/s, flow=19.93mm³/s), measured=39.41mm in 5.03 seconds (at speed=7.95mm/s, flow=19.13mm³/s) = 4.35% speed deviation

Run 1/3 - requested=39.50mm (at speed=7.88mm/s, flow=18.96mm³/s), measured=37.39mm in 5.03 seconds (at speed=7.59mm/s, flow=18.26mm³/s) = 3.88% speed deviation

Run 2/3 - requested=39.50mm (at speed=7.87mm/s, flow=18.92mm³/s), measured=37.58mm in 5.14 seconds (at speed=7.55mm/s, flow=18.15mm³/s) = 4.47% speed deviation

Run 3/3 - requested=39.50mm (at speed=7.87mm/s, flow=18.92mm³/s), measured=37.71mm in 5.04 seconds (at speed=7.56mm/s, flow=18.19mm³/s) = 4.24% speed deviation

Run 1/3 - requested=37.42mm (at speed=7.47mm/s, flow=17.97mm³/s), measured=35.66mm in 5.14 seconds (at speed=7.19mm/s, flow=17.29mm³/s) = 3.95% speed deviation

Run 2/3 - requested=37.42mm (at speed=7.48mm/s, flow=17.99mm³/s), measured=35.25mm in 5.04 seconds (at speed=7.18mm/s, flow=17.28mm³/s) = 4.01% speed deviation

Run 3/3 - requested=37.42mm (at speed=7.48mm/s, flow=17.99mm³/s), measured=35.47mm in 5.03 seconds (at speed=7.21mm/s, flow=17.34mm³/s) = 3.65% speed deviation

Run 1/3 - requested=35.34mm (at speed=7.05mm/s, flow=16.96mm³/s), measured=33.60mm in 5.14 seconds (at speed=6.76mm/s, flow=16.26mm³/s) = 4.38% speed deviation

Run 2/3 - requested=35.34mm (at speed=7.05mm/s, flow=16.96mm³/s), measured=33.69mm in 5.03 seconds (at speed=6.75mm/s, flow=16.23mm³/s) = 4.55% speed deviation

Run 3/3 - requested=35.34mm (at speed=7.05mm/s, flow=16.96mm³/s), measured=33.60mm in 5.03 seconds (at speed=6.76mm/s, flow=16.27mm³/s) = 4.29% speed deviation

Run 1/3 - requested=33.26mm (at speed=6.65mm/s, flow=15.99mm³/s), measured=31.36mm in 4.94 seconds (at speed=6.32mm/s, flow=15.20mm³/s) = 5.01% speed deviation

Run 2/3 - requested=33.26mm (at speed=6.65mm/s, flow=15.99mm³/s), measured=31.22mm in 5.03 seconds (at speed=6.34mm/s, flow=15.25mm³/s) = 4.70% speed deviation

Run 3/3 - requested=33.26mm (at speed=6.65mm/s, flow=15.99mm³/s), measured=30.95mm in 5.03 seconds (at speed=6.30mm/s, flow=15.15mm³/s) = 5.28% speed deviation

Run 1/3 - requested=31.18mm (at speed=6.23mm/s, flow=14.99mm³/s), measured=29.39mm in 5.04 seconds (at speed=5.94mm/s, flow=14.28mm³/s) = 4.78% speed deviation

Run 2/3 - requested=31.18mm (at speed=6.23mm/s, flow=14.99mm³/s), measured=29.35mm in 5.04 seconds (at speed=5.92mm/s, flow=14.23mm³/s) = 5.12% speed deviation

Run 3/3 - requested=31.18mm (at speed=6.23mm/s, flow=14.99mm³/s), measured=29.26mm in 5.04 seconds (at speed=5.96mm/s, flow=14.34mm³/s) = 4.42% speed deviation

Run 1/3 - requested=29.10mm (at speed=5.81mm/s, flow=13.96mm³/s), measured=27.57mm in 5.13 seconds (at speed=5.48mm/s, flow=13.18mm³/s) = 5.85% speed deviation

Run 2/3 - requested=29.10mm (at speed=5.81mm/s, flow=13.98mm³/s), measured=27.06mm in 5.03 seconds (at speed=5.55mm/s, flow=13.36mm³/s) = 4.56% speed deviation

Run 3/3 - requested=29.10mm (at speed=5.81mm/s, flow=13.99mm³/s), measured=27.20mm in 5.03 seconds (at speed=5.50mm/s, flow=13.24mm³/s) = 5.46% speed deviation

Run 1/3 - requested=27.02mm (at speed=5.39mm/s, flow=12.96mm³/s), measured=25.51mm in 5.04 seconds (at speed=5.16mm/s, flow=12.41mm³/s) = 4.56% speed deviation

Run 2/3 - requested=27.02mm (at speed=5.39mm/s, flow=12.96mm³/s), measured=25.33mm in 5.13 seconds (at speed=5.11mm/s, flow=12.29mm³/s) = 5.46% speed deviation

Run 3/3 - requested=27.02mm (at speed=5.39mm/s, flow=12.96mm³/s), measured=25.69mm in 5.14 seconds (at speed=5.14mm/s, flow=12.37mm³/s) = 4.86% speed deviation

Run 1/3 - requested=24.95mm (at speed=4.98mm/s, flow=11.98mm³/s), measured=23.68mm in 5.03 seconds (at speed=4.77mm/s, flow=11.47mm³/s) = 4.43% speed deviation

Run 2/3 - requested=24.95mm (at speed=4.98mm/s, flow=11.98mm³/s), measured=23.54mm in 5.03 seconds (at speed=4.75mm/s, flow=11.44mm³/s) = 4.70% speed deviation

Run 3/3 - requested=24.95mm (at speed=4.97mm/s, flow=11.96mm³/s), measured=23.50mm in 5.13 seconds (at speed=4.71mm/s, flow=11.32mm³/s) = 5.63% speed deviation

Run 1/3 - requested=22.87mm (at speed=4.56mm/s, flow=10.97mm³/s), measured=21.94mm in 5.03 seconds (at speed=4.41mm/s, flow=10.60mm³/s) = 3.66% speed deviation

Run 2/3 - requested=22.87mm (at speed=4.56mm/s, flow=10.98mm³/s), measured=21.85mm in 5.03 seconds (at speed=4.42mm/s, flow=10.62mm³/s) = 3.44% speed deviation

Run 3/3 - requested=22.87mm (at speed=4.57mm/s, flow=10.98mm³/s), measured=21.58mm in 4.93 seconds (at speed=4.36mm/s, flow=10.50mm³/s) = 4.57% speed deviation

Run 1/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.96mm³/s), measured=19.70mm in 5.04 seconds (at speed=3.98mm/s, flow=9.58mm³/s) = 4.24% speed deviation

Run 2/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.96mm³/s), measured=19.70mm in 5.03 seconds (at speed=3.97mm/s, flow=9.54mm³/s) = 4.63% speed deviation

Run 3/3 - requested=20.79mm (at speed=4.14mm/s, flow=9.96mm³/s), measured=20.07mm in 5.03 seconds (at speed=4.02mm/s, flow=9.68mm³/s) = 3.25% speed deviation

Run 1/3 - requested=18.71mm (at speed=3.72mm/s, flow=8.96mm³/s), measured=18.01mm in 5.13 seconds (at speed=3.57mm/s, flow=8.58mm³/s) = 4.69% speed deviation

Run 2/3 - requested=18.71mm (at speed=3.73mm/s, flow=8.96mm³/s), measured=17.65mm in 5.03 seconds (at speed=3.60mm/s, flow=8.66mm³/s) = 3.77% speed deviation

Run 3/3 - requested=18.71mm (at speed=3.73mm/s, flow=8.96mm³/s), measured=18.29mm in 5.03 seconds (at speed=3.65mm/s, flow=8.79mm³/s) = 2.35% speed deviation

Run 1/3 - requested=16.63mm (at speed=3.31mm/s, flow=7.96mm³/s), measured=15.86mm in 5.03 seconds (at speed=3.18mm/s, flow=7.65mm³/s) = 4.36% speed deviation

Run 2/3 - requested=16.63mm (at speed=3.32mm/s, flow=7.98mm³/s), measured=16.18mm in 4.93 seconds (at speed=3.24mm/s, flow=7.80mm³/s) = 2.50% speed deviation

Run 3/3 - requested=16.63mm (at speed=3.32mm/s, flow=7.98mm³/s), measured=15.68mm in 5.13 seconds (at speed=3.22mm/s, flow=7.75mm³/s) = 3.13% speed deviation

Run 1/3 - requested=14.55mm (at speed=2.89mm/s, flow=6.96mm³/s), measured=14.08mm in 5.03 seconds (at speed=2.77mm/s, flow=6.67mm³/s) = 4.73% speed deviation

Run 2/3 - requested=14.55mm (at speed=2.89mm/s, flow=6.96mm³/s), measured=13.99mm in 5.04 seconds (at speed=2.82mm/s, flow=6.79mm³/s) = 2.95% speed deviation

Run 3/3 - requested=14.55mm (at speed=2.89mm/s, flow=6.96mm³/s), measured=13.71mm in 5.04 seconds (at speed=2.82mm/s, flow=6.78mm³/s) = 3.08% speed deviation

Run 1/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.16mm in 5.03 seconds (at speed=2.42mm/s, flow=5.81mm³/s) = 3.16% speed deviation

Run 2/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=11.89mm in 5.03 seconds (at speed=2.35mm/s, flow=5.65mm³/s) = 5.84% speed deviation

Run 3/3 - requested=12.47mm (at speed=2.48mm/s, flow=5.96mm³/s), measured=12.07mm in 5.03 seconds (at speed=2.38mm/s, flow=5.73mm³/s) = 4.56% speed deviation

Run 1/3 - requested=10.39mm (at speed=2.07mm/s, flow=4.97mm³/s), measured=9.87mm in 4.94 seconds (at speed=1.96mm/s, flow=4.71mm³/s) = 5.84% speed deviation

Run 2/3 - requested=10.39mm (at speed=2.07mm/s, flow=4.97mm³/s), measured=9.97mm in 5.03 seconds (at speed=1.97mm/s, flow=4.74mm³/s) = 5.16% speed deviation

Run 3/3 - requested=10.39mm (at speed=2.06mm/s, flow=4.96mm³/s), measured=9.78mm in 5.03 seconds (at speed=1.95mm/s, flow=4.68mm³/s) = 6.39% speed deviation

ProtoXtruder

Assuming non-linear extrusion compensation is enabled, a maximum volumetric flow up to 18.724039mm³/s is suggested which will keep E speed below 7.78mm/s (which corresponds to 8.67mm/s after compensation). If the extruder is unable to reliably sustain this speed, lowering the max volumetric flow further is recommended.
Compensation coefficients: [-0.66375761  1.63077321 -0.18471127  0.01659579].
Enable with: ENABLE_NONLINEAR_EXTRUSION SENSOR=roadrunner ENABLE=1 COEFFICIENTS=-0.6637576,1.6307732,-0.1847113,0.0165958
Assuming no non-linear extrusion compensation, a conservative volumetric flow of 20.0mm³/s is suggested which will keep E speed below 8.32mm/s and the deviation from requested speed within a margin of 5.0%.