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extruder: Allow an extruder object to be created without a stepper 

This may be useful for dual hotend printers that have only one
stepper.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2022-02-21 13:51:27 -05:00
parent 4a8aece6a7
commit 6627d036ac
2 changed files with 25 additions and 12 deletions
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14
docs/Config_Reference.md
View File

@ -638,10 +638,11 @@ max_accel: 1
### [extruder]
The extruder section is used to describe both the stepper controlling
the printer extruder and the heater parameters for the nozzle. See the
[pressure advance guide](Pressure_Advance.md) for information on
tuning pressure advance.
The extruder section is used to describe the heater parameters for the
nozzle hotend along with the stepper controlling the extruder. See the
[command reference](G-Codes.md#extruder) for additional information.
See the [pressure advance guide](Pressure_Advance.md) for information
on tuning pressure advance.
```
[extruder]
@ -652,7 +653,10 @@ microsteps:
rotation_distance:
#full_steps_per_rotation:
#gear_ratio:
# See the "stepper" section for a description of the above parameters.
# See the "stepper" section for a description of the above
# parameters. If none of the above parameters are specified then no
# stepper will be associated with the nozzle hotend (though a
# SYNC_EXTRUDER_MOTION command may associate one at run-time).
nozzle_diameter:
# Diameter of the nozzle orifice (in mm). This parameter must be
# provided.

9
klippy/kinematics/extruder.py
View File

@ -79,6 +79,8 @@ class ExtruderStepper:
cmd_SET_PRESSURE_ADVANCE_help = "Set pressure advance parameters"
def cmd_default_SET_PRESSURE_ADVANCE(self, gcmd):
extruder = self.printer.lookup_object('toolhead').get_extruder()
if extruder.extruder_stepper is None:
raise gcmd.error("Active extruder does not have a stepper")
extruder.extruder_stepper.cmd_SET_PRESSURE_ADVANCE(gcmd)
def cmd_SET_PRESSURE_ADVANCE(self, gcmd):
pressure_advance = gcmd.get_float('ADVANCE', self.pressure_advance,
@ -181,6 +183,10 @@ class PrinterExtruder:
self.trapq_append = ffi_lib.trapq_append
self.trapq_finalize_moves = ffi_lib.trapq_finalize_moves
# Setup extruder stepper
self.extruder_stepper = None
if (config.get('step_pin', None) is not None
or config.get('dir_pin', None) is not None
or config.get('rotation_distance', None) is not None):
self.extruder_stepper = ExtruderStepper(config)
self.extruder_stepper.stepper.set_trapq(self.trapq)
pa = config.getfloat('pressure_advance', 0., minval=0.)
@ -201,6 +207,7 @@ class PrinterExtruder:
def get_status(self, eventtime):
sts = self.heater.get_status(eventtime)
sts['can_extrude'] = self.heater.can_extrude
if self.extruder_stepper is not None:
sts.update(self.extruder_stepper.get_status(eventtime))
return sts
def get_name(self):
@ -259,6 +266,8 @@ class PrinterExtruder:
start_v, cruise_v, accel)
self.last_position = move.end_pos[3]
def find_past_position(self, print_time):
if self.extruder_stepper is None:
return 0.
return self.extruder_stepper.find_past_position(print_time)
def cmd_M104(self, gcmd, wait=False):
# Set Extruder Temperature