When adding an extruder `rotation_distance` it is preferable to specify a `gear_ratio` if the extruder has a gearing mechanism. We expect the rotation_distance in the example configs to correlate with the circumference of the hobbed gear in the extruder - it is normally in the range of 20 to 35mm. When specifying a `gear_ratio` it is preferable to specify the actual gears on the mechanism (eg, prefer `gear_ratio: 80:20` over `gear_ratio: 4:1`). See the [rotation distance document](Rotation_Distance.md#using-a-gear_ratio) for more information.
When adding an extruder `rotation_distance` it is preferable to specify a `gear_ratio` if the extruder has a gearing mechanism. We expect the rotation_distance in the example configs to correlate with the circumference of the hobbed gear in the extruder - it is normally in the range of 20 to 35mm. When specifying a `gear_ratio` it is preferable to specify the actual gears on the mechanism (eg, prefer `gear_ratio: 80:20` over `gear_ratio: 4:1`). See the [rotation distance document](Rotation_Distance.md#using-a-gear_ratio) for more information.
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