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extruder: Add support for "pressure advance" on extrusion

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Add a config option to define an amount of additional filament to feed
into the extruder during acceleration and deceleration of the
extruder.  This can help ensure plastic is deposited in the correct
places during a print.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2016-07-16 19:58:41 -04:00
parent c847606311
commit dc37a07a8e
3 changed files with 109 additions and 39 deletions
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5
config/example.cfg
View File

@@ -90,6 +90,11 @@ step_distance: .004242
max_velocity: 200000
max_accel: 3000
# The remaining variables describe the extruder heater
pressure_advance: 0.0
# The amount of raw filament to push into the extruder during
# extruder acceleration. An equal amount of filament is retracted
# during deceleration. It is measured in millimeters per
# millimeter/second
heater_pin: ar4
# PWM output pin controlling the heater
thermistor_pin: analog1

7
config/makergear-m2-2012.cfg
View File

@@ -1,7 +1,7 @@
# Support for Makergear M2 printers circa 2012 that have the RAMBo
# v1.0d electronics. The electronics use Allegro A4984 stepper
# drivers with 1/8th micro-stepping. To use this config, the firmware
# should be compiled for the AVR atmega2560.
# v1.0d electronics along with the V3A extruder. The electronics use
# Allegro A4984 stepper drivers with 1/8th micro-stepping. To use
# this config, the firmware should be compiled for the AVR atmega2560.
[stepper_x]
step_pin: PC0
@@ -50,6 +50,7 @@ enable_pin: !PA4
step_distance: .004242
max_velocity: 200000
max_accel: 3000
pressure_advance: 0.07
heater_pin: PH6
thermistor_pin: PF0
thermistor_type: EPCOS 100K B57560G104F