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diff --git a/docs/Rotation_Distance.md b/docs/Rotation_Distance.md index a2b9673b..0d7c6c9b 100644 --- a/docs/Rotation_Distance.md +++ b/docs/Rotation_Distance.md @@ -1,3 +1,5 @@ +# Rotation distance + Stepper motor drivers on Klipper require a `rotation_distance` parameter in each [stepper config section](Config_Reference.md#stepper). The @@ -5,7 +7,7 @@ parameter in each one full revolution of the stepper motor. This document describes how one can configure this value. -# Obtaining rotation_distance from steps_per_mm (or step_distance) +## Obtaining rotation_distance from steps_per_mm (or step_distance) The designers of your 3d printer originally calculated `steps_per_mm` from a rotation distance. If you know the steps_per_mm then it is @@ -38,7 +40,7 @@ on x, y, and z type axes. If the above formula results in a rotation_distance that is within .01 of a whole number then round the final value to that whole_number. -# Calibrating rotation_distance on extruders +## Calibrating rotation_distance on extruders On an extruder, the `rotation_distance` is the amount of distance the filament travels for one full rotation of the stepper motor. The best @@ -79,13 +81,13 @@ enough for those axes and will likely lead to a worse configuration. Instead, if needed, those axes can be determined by [measuring the belts, pulleys, and lead screw hardware](#obtaining-rotation_distance-by-inspecting-the-hardware). -# Obtaining rotation_distance by inspecting the hardware +## Obtaining rotation_distance by inspecting the hardware It's possible to calculate rotation_distance with knowledge of the stepper motors and printer kinematics. This may be useful if the steps_per_mm is not known or if designing a new printer. -## Belt driven axes +### Belt driven axes It is easy to calculate rotation_distance for a linear axis that uses a belt and pulley. @@ -101,7 +103,7 @@ rotation_distance = <belt_pitch> * <number_of_teeth_on_pulley> For example, if a printer has a 2mm belt and uses a pulley with 20 teeth, then the rotation distance is 40. -## Axes with a lead screw +### Axes with a lead screw It is easy to calculate the rotation_distance for common lead screws using the following formula: @@ -118,7 +120,7 @@ screw pitch is the distance between each groove on the screw.) So, for example, an M6 metric rod has a rotation distance of 1 and an M8 rod has a rotation distance of 1.25. -## Extruder +### Extruder It's possible to obtain an initial rotation distance for extruders by measuring the diameter of the "hobbed bolt" that pushes the filament @@ -135,7 +137,7 @@ obtaining an initial rotation_distance, use the [measure and trim procedure](#calibrating-rotation_distance-on-extruders) to obtain a more accurate setting. -# Using a gear_ratio +## Using a gear_ratio Setting a `gear_ratio` can make it easier to configure the `rotation_distance` on steppers that have a gear box (or similar) |