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extruder: Calculate sane defaults for extrude only velocity and accel

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Instead of requiring the user enter velocity and accel parameters for
extrude only moves, calculate sane defaults from the printer's maximum
velocity and accel.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2017-01-02 18:58:45 -05:00
parent b26922978a
commit c87c090264
8 changed files with 21 additions and 16 deletions
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12
config/example.cfg
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@ -125,12 +125,16 @@ filament_diameter: 3.500
# may be. If an extrude only move requests a distance greater than
# this value it will cause an error to be returned. The default is
# 50mm.
max_velocity: 200000
#max_extrude_only_velocity:
# Maximum velocity (in mm/s) of the extruder motor for extrude only
# moves. This parameter must be provided.
max_accel: 3000
# moves. If this is not specified then it is calculated to match the
# limit an XY printing move with a max_extrude_cross_section
# extrusion would have.
#max_extrude_only_accel:
# Maximum acceleration (in mm/s^2) of the extruder motor for extrude
# only moves. This parameter must be provided.
# only moves. If this is not specified then it is calculated to
# match the limit an XY printing move with a
# max_extrude_cross_section extrusion would have.
#pressure_advance: 0.0
# The amount of raw filament to push into the extruder during
# extruder acceleration. An equal amount of filament is retracted