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Sovol SV08 extrusion calibration (rotation_distance)

The stock Sovol SV08 rotation_distance is 6.5 mm per revolution. That is the starting point in its Klipper config — tune it once with the mark-and-measure test and the extruder tracks reality. The rotation distance & e-steps calculator does the correction math and prints the exact line to paste; the full calibration guide explains the test in detail.

6.5

stock rotation_distance (mm per revolution) — Sovol SV08

PrinterSovol SV08
Stock firmwareKlipper (rotation_distance)
Extruderdual-gear direct drive (Voron-style)
Stock default6.5 mm per revolution
Worked example100 mm requested, 97 mm measured → 6.3050

The SV08 is a Voron-2.4-inspired CoreXY that ships with Klipper and a compact geared direct drive — its stock rotation_distance is just 6.5 mm per motor revolution. This default is a community-verified value consistent with the stock config — manufacturers revise hardware without notice, so treat it as the starting point the calibration test then refines. Source.

How to calibrate on the Sovol SV08

  1. Heat the hotend to normal print temperature and mark the filament exactly 120 mm above the extruder inlet with a ruler and a fine marker or tape flag.
  2. Extrude 100 mm slowly. From a console send G91, then G1 E100 F60 — slow, so back-pressure does not skew the measurement. If Klipper rejects the move, set max_extrude_only_distance to at least 101 under [extruder] and RESTART first.
  3. Measure what actually went through. Measure from the inlet to the mark again — actual extrusion is 120 − remainder (23 mm remaining means 97 mm extruded).
  4. Compute the new value. new rotation_distance = old × actual ÷ requested — with the stock 6.5 and 97 mm measured: 6.5 × 97 ÷ 100 = 6.3050. Note the direction: under-extrusion pushes rotation_distance down. The calculator does this arithmetic for you.
  5. Save in printer.cfg. Paste rotation_distance: 6.3050 under [extruder], then RESTART. Klipper has no M500 — the config file is the save.
  6. Confirm. Repeat the test once; the mark should land 20 mm from the inlet. Within about ±0.5 mm is measurement noise, not a reason to iterate.

Notes for the Sovol SV08

Community-verified from stock config backups. The SV08’s stock max_extrude_only_distance is 150 mm, so the standard 100 mm test move works without config changes.

Frequently asked questions

What is the stock rotation distance on the Sovol SV08?
The stock rotation_distance is 6.5 mm per motor revolution. This default is a community-verified value consistent with the stock config — manufacturers revise hardware without notice, so treat it as the starting point the calibration test then refines. Run the mark-and-measure test once to tune it for your specific machine.

How do I change rotation distance on the Sovol SV08?
Edit rotation_distance under [extruder] in printer.cfg and send RESTART (or paste the new value and use SAVE_CONFIG if you set it via a console macro). Klipper has no M500 — the value lives in the config file.

What is the formula for the new rotation_distance?
new rotation_distance = old × actual ÷ requested. If you asked for 100 mm and measured 97 mm, the value goes down: 6.5 × 97 ÷ 100 = 6.3050. This is inverted versus Marlin e-steps, which go up for the same under-extrusion.

Can I use e-steps (M92) on the Sovol SV08?
No — the Sovol SV08 runs Klipper, which only understands rotation_distance. M92 has no effect. If a guide gives you e-steps, convert: rotation_distance = (full steps per rotation × microsteps) ÷ steps per mm, accounting for any gear_ratio in the config.

How often should I recalibrate extrusion on the Sovol SV08?
After any change in the drive path — extruder gears, motor, hotend or extruder assembly — and whenever every print shows consistent over- or under-extrusion across filaments. It survives filament swaps; per-filament differences belong in the slicer’s flow setting, not in rotation_distance.

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