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Diffstat (limited to 'docs/Rotation_Distance.md')
| -rw-r--r-- | docs/Rotation_Distance.md | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/docs/Rotation_Distance.md b/docs/Rotation_Distance.md index c143bbe8..b8134ce3 100644 --- a/docs/Rotation_Distance.md +++ b/docs/Rotation_Distance.md @@ -154,8 +154,15 @@ determine the gear_ratio by counting the teeth on the pulleys. For example, if a stepper with a 16 toothed pulley drives the next pulley with 80 teeth then one would use `gear_ratio: 80:16`. Indeed, one could open a common off the shelf "gear box" and count the teeth in it -to confirm its gear ratio. Note that the common "5.18:1 planetary -gearbox" is more accurately configured with `gear_ratio: 57:11`. +to confirm its gear ratio. + +Note that sometimes a gearbox will have a slightly different gear +ratio than what it is advertised as. The common BMG extruder motor +gears are an example of this - they are advertised as "3:1" but +actually use "50:17" gearing. (Using teeth numbers without a common +denominator may improve wear leveling as the teeth don't always mesh +the same way with each revolution.) The common "5.18:1 planetary +gearbox", is more accurately configured with `gear_ratio: 57:11`. If several gears are used on an axis then it is possible to provide a comma separated list to gear_ratio. For example, a "5:1" gear box |