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config: Specify gear_ratio for Prusa Mini+ extruder 

Also clarifies the documentation for rotation_distance in the
stepper docs.

Signed-off-by: Matthew Lloyd <github@matthewlloyd.net>
This commit is contained in:
github@matthewlloyd.net 2021-06-15 17:36:00 -04:00 committed by KevinOConnor
parent 8bcfaa53aa
commit 478f26cab6
2 changed files with 4 additions and 2 deletions
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3
config/printer-prusa-mini-plus-2020.cfg
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@ -66,7 +66,8 @@ step_pin: PD9
dir_pin: !PD8
enable_pin: !PD10
microsteps: 16
rotation_distance: 9.84615 # 200 * 16 / 325
rotation_distance: 29.5385 # (200 * 16 * 3) / 325
gear_ratio: 3:1
nozzle_diameter: 0.400
filament_diameter: 1.750
heater_pin: PB1

3
docs/Config_Reference.md
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@ -132,7 +132,8 @@ enable_pin:
# driver must always be enabled.
rotation_distance:
# Distance (in mm) that the axis travels with one full rotation of
# the stepper motor. This parameter must be provided.
# the stepper motor (or final gear if gear_ratio is specified).
# This parameter must be provided.
microsteps:
# The number of microsteps the stepper motor driver uses. This
# parameter must be provided.