133 lines
6.4 KiB
Python
133 lines
6.4 KiB
Python
# Kinematic input shaper to minimize motion vibrations in XY plane
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#
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# Copyright (C) 2019-2020 Kevin O'Connor <kevin@koconnor.net>
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# Copyright (C) 2020 Dmitry Butyugin <dmbutyugin@google.com>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import chelper
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class InputShaper:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.printer.register_event_handler("klippy:connect", self.connect)
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self.toolhead = None
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self.damping_ratio_x = config.getfloat(
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'damping_ratio_x', 0.1, minval=0., maxval=1.)
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self.damping_ratio_y = config.getfloat(
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'damping_ratio_y', 0.1, minval=0., maxval=1.)
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self.shaper_freq_x = config.getfloat('shaper_freq_x', 0., minval=0.)
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self.shaper_freq_y = config.getfloat('shaper_freq_y', 0., minval=0.)
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ffi_main, ffi_lib = chelper.get_ffi()
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self.shapers = {None: None
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, 'zv': ffi_lib.INPUT_SHAPER_ZV
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, 'zvd': ffi_lib.INPUT_SHAPER_ZVD
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, 'mzv': ffi_lib.INPUT_SHAPER_MZV
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, 'ei': ffi_lib.INPUT_SHAPER_EI
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, '2hump_ei': ffi_lib.INPUT_SHAPER_2HUMP_EI
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, '3hump_ei': ffi_lib.INPUT_SHAPER_3HUMP_EI}
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shaper_type = config.getchoice('shaper_type', self.shapers, None)
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if shaper_type is None:
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self.shaper_type_x = config.getchoice(
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'shaper_type_x', self.shapers, 'mzv')
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self.shaper_type_y = config.getchoice(
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'shaper_type_y', self.shapers, 'mzv')
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else:
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self.shaper_type_x = self.shaper_type_y = shaper_type
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self.stepper_kinematics = []
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self.orig_stepper_kinematics = []
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# Register gcode commands
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gcode = self.printer.lookup_object('gcode')
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gcode.register_command("SET_INPUT_SHAPER",
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self.cmd_SET_INPUT_SHAPER,
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desc=self.cmd_SET_INPUT_SHAPER_help)
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def connect(self):
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self.toolhead = self.printer.lookup_object("toolhead")
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kin = self.toolhead.get_kinematics()
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# Lookup stepper kinematics
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ffi_main, ffi_lib = chelper.get_ffi()
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steppers = kin.get_steppers()
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for s in steppers:
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sk = ffi_main.gc(ffi_lib.input_shaper_alloc(), ffi_lib.free)
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orig_sk = s.set_stepper_kinematics(sk)
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res = ffi_lib.input_shaper_set_sk(sk, orig_sk)
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if res < 0:
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s.set_stepper_kinematics(orig_sk)
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continue
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self.stepper_kinematics.append(sk)
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self.orig_stepper_kinematics.append(orig_sk)
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# Configure initial values
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self.old_delay = 0.
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self._set_input_shaper(self.shaper_type_x, self.shaper_type_y,
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self.shaper_freq_x, self.shaper_freq_y,
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self.damping_ratio_x, self.damping_ratio_y)
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def _set_input_shaper(self, shaper_type_x, shaper_type_y
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, shaper_freq_x, shaper_freq_y
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, damping_ratio_x, damping_ratio_y):
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if (shaper_type_x != self.shaper_type_x
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or shaper_type_y != self.shaper_type_y):
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self.toolhead.flush_step_generation()
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ffi_main, ffi_lib = chelper.get_ffi()
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new_delay = max(
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ffi_lib.input_shaper_get_step_generation_window(
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shaper_type_x, shaper_freq_x, damping_ratio_x),
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ffi_lib.input_shaper_get_step_generation_window(
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shaper_type_y, shaper_freq_y, damping_ratio_y))
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self.toolhead.note_step_generation_scan_time(new_delay,
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old_delay=self.old_delay)
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self.old_delay = new_delay
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self.shaper_type_x = shaper_type_x
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self.shaper_type_y = shaper_type_y
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self.shaper_freq_x = shaper_freq_x
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self.shaper_freq_y = shaper_freq_y
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self.damping_ratio_x = damping_ratio_x
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self.damping_ratio_y = damping_ratio_y
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for sk in self.stepper_kinematics:
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ffi_lib.input_shaper_set_shaper_params(sk
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, shaper_type_x, shaper_type_y
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, shaper_freq_x, shaper_freq_y
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, damping_ratio_x, damping_ratio_y)
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cmd_SET_INPUT_SHAPER_help = "Set cartesian parameters for input shaper"
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def cmd_SET_INPUT_SHAPER(self, gcmd):
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damping_ratio_x = gcmd.get_float(
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'DAMPING_RATIO_X', self.damping_ratio_x, minval=0., maxval=1.)
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damping_ratio_y = gcmd.get_float(
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'DAMPING_RATIO_Y', self.damping_ratio_y, minval=0., maxval=1.)
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shaper_freq_x = gcmd.get_float(
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'SHAPER_FREQ_X', self.shaper_freq_x, minval=0.)
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shaper_freq_y = gcmd.get_float(
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'SHAPER_FREQ_Y', self.shaper_freq_y, minval=0.)
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def parse_shaper(shaper_type_str):
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shaper_type_str = shaper_type_str.lower()
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if shaper_type_str not in self.shapers:
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raise gcmd.error(
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"Requested shaper type '%s' is not supported" % (
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shaper_type_str))
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return self.shapers[shaper_type_str]
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shaper_type = gcmd.get('SHAPER_TYPE', None, parser=parse_shaper)
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if shaper_type is None:
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shaper_type_x = gcmd.get('SHAPER_TYPE_X', self.shaper_type_x,
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parser=parse_shaper)
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shaper_type_y = gcmd.get('SHAPER_TYPE_Y', self.shaper_type_y,
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parser=parse_shaper)
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else:
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shaper_type_x = shaper_type_y = shaper_type
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self._set_input_shaper(shaper_type_x, shaper_type_y,
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shaper_freq_x, shaper_freq_y,
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damping_ratio_x, damping_ratio_y)
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gcmd.respond_info("shaper_type_x:%s shaper_type_y:%s "
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"shaper_freq_x:%.3f shaper_freq_y:%.3f "
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"damping_ratio_x:%.6f damping_ratio_y:%.6f" % (
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self.shapers.keys()[
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self.shapers.values().index(shaper_type_x)]
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, self.shapers.keys()[
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self.shapers.values().index(shaper_type_y)]
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, shaper_freq_x, shaper_freq_y
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, damping_ratio_x, damping_ratio_y))
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def load_config(config):
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return InputShaper(config)
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