diff options
| -rw-r--r-- | config/example.cfg | 7 | ||||
| -rw-r--r-- | klippy/extruder.py | 27 |
2 files changed, 21 insertions, 13 deletions
diff --git a/config/example.cfg b/config/example.cfg index 09f6c9ad..2119b3c9 100644 --- a/config/example.cfg +++ b/config/example.cfg @@ -120,9 +120,10 @@ filament_diameter: 3.500 # extruder. This parameter must be provided. #max_extrude_cross_section: # Maximum area of the cross section of an extrusion line (in -# mm^2). If a move requests an extrusion rate that would exceed this -# value it will cause an error to be returned. The default is: 4.0 * -# nozzle_diameter^2 +# mm^2). This setting prevents excessive amounts of extrusion during +# relatively small XY moves. If a move requests an extrusion rate +# that would exceed this value it will cause an error to be +# returned. The default is: 4.0 * nozzle_diameter^2 #max_extrude_only_distance: 50.0 # Maximum length (in mm of raw filament) that an extrude only move # may be. If an extrude only move requests a distance greater than diff --git a/klippy/extruder.py b/klippy/extruder.py index fb317414..45ed3bfc 100644 --- a/klippy/extruder.py +++ b/klippy/extruder.py @@ -16,11 +16,11 @@ class PrinterExtruder: self.nozzle_diameter = config.getfloat('nozzle_diameter', above=0.) filament_diameter = config.getfloat( 'filament_diameter', minval=self.nozzle_diameter) - filament_area = math.pi * (filament_diameter * .5)**2 + self.filament_area = math.pi * (filament_diameter * .5)**2 max_cross_section = config.getfloat( 'max_extrude_cross_section', 4. * self.nozzle_diameter**2 , above=0.) - self.max_extrude_ratio = max_cross_section / filament_area + self.max_extrude_ratio = max_cross_section / self.filament_area toolhead = printer.objects['toolhead'] max_velocity, max_accel = toolhead.get_max_velocity() self.max_e_velocity = self.config.getfloat( @@ -57,22 +57,29 @@ class PrinterExtruder: move.extrude_r = move.axes_d[3] / move.move_d move.extrude_max_corner_v = 0. if not self.heater.can_extrude: - raise homing.EndstopMoveError( - move.end_pos, "Extrude below minimum temp") + raise homing.EndstopError( + "Extrude below minimum temp\n" + "See the 'min_extrude_temp' config option for details") if not move.is_kinematic_move or move.extrude_r < 0.: # Extrude only move (or retraction move) - limit accel and velocity if abs(move.axes_d[3]) > self.max_e_dist: - raise homing.EndstopMoveError( - move.end_pos, "Extrude move too long") + raise homing.EndstopError( + "Extrude only move too long (%.3fmm vs %.3fmm)\n" + "See the 'max_extrude_only_distance' config" + " option for details" % (move.axes_d[3], self.max_e_dist)) inv_extrude_r = 1. / abs(move.extrude_r) move.limit_speed(self.max_e_velocity * inv_extrude_r , self.max_e_accel * inv_extrude_r) elif (move.extrude_r > self.max_extrude_ratio and move.axes_d[3] > self.nozzle_diameter*self.max_extrude_ratio): - logging.debug("Overextrude: %s vs %s" % ( - move.extrude_r, self.max_extrude_ratio)) - raise homing.EndstopMoveError( - move.end_pos, "Move exceeds maximum extrusion cross section") + area = move.axes_d[3] * self.filament_area / move.move_d + logging.debug("Overextrude: %s vs %s (area=%.3f dist=%.3f)", + move.extrude_r, self.max_extrude_ratio, + area, move.move_d) + raise homing.EndstopError( + "Move exceeds maximum extrusion (%.3fmm^2 vs %.3fmm^2)\n" + "See the 'max_extrude_cross_section' config option for details" + % (area, self.max_extrude_ratio * self.filament_area)) def calc_junction(self, prev_move, move): extrude = move.axes_d[3] prev_extrude = prev_move.axes_d[3] |