118 lines
5.3 KiB
Python
118 lines
5.3 KiB
Python
# Utility for manually moving a stepper for diagnostic purposes
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#
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# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
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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 math, logging
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import chelper
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BUZZ_VELOCITY = 4.
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STALL_TIME = 0.100
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# Calculate a move's accel_t, cruise_t, and cruise_v
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def calc_move_time(dist, speed, accel):
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dist = abs(dist)
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if not accel or not dist:
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return 0., dist / speed, speed
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max_cruise_v2 = dist * accel
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if max_cruise_v2 < speed**2:
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speed = math.sqrt(max_cruise_v2)
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accel_t = speed / accel
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accel_decel_d = accel_t * speed
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cruise_t = (dist - accel_decel_d) / speed
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return accel_t, cruise_t, speed
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class ForceMove:
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def __init__(self, config):
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self.printer = config.get_printer()
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self.steppers = {}
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# Setup iterative solver
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ffi_main, ffi_lib = chelper.get_ffi()
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self.cmove = ffi_main.gc(ffi_lib.move_alloc(), ffi_lib.free)
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self.move_fill = ffi_lib.move_fill
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self.stepper_kinematics = ffi_main.gc(
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ffi_lib.cartesian_stepper_alloc('x'), ffi_lib.free)
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# Register commands
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self.gcode = self.printer.lookup_object('gcode')
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self.gcode.register_command('STEPPER_BUZZ', self.cmd_STEPPER_BUZZ,
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desc=self.cmd_STEPPER_BUZZ_help)
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if config.getboolean("enable_force_move", False):
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self.gcode.register_command('FORCE_MOVE', self.cmd_FORCE_MOVE,
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desc=self.cmd_FORCE_MOVE_help)
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self.gcode.register_command(
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'SET_KINEMATIC_POSITION', self.cmd_SET_KINEMATIC_POSITION,
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desc=self.cmd_SET_KINEMATIC_POSITION_help)
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def register_stepper(self, stepper):
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name = stepper.get_name()
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self.steppers[name] = stepper
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def force_enable(self, stepper):
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toolhead = self.printer.lookup_object('toolhead')
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print_time = toolhead.get_last_move_time()
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was_enable = stepper.is_motor_enabled()
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if not was_enable:
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stepper.motor_enable(print_time, 1)
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toolhead.dwell(STALL_TIME)
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was_ignore = stepper.set_ignore_move(False)
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return was_enable, was_ignore
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def restore_enable(self, stepper, was_enable, was_ignore):
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stepper.set_ignore_move(was_ignore)
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if not was_enable:
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toolhead = self.printer.lookup_object('toolhead')
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toolhead.dwell(STALL_TIME)
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print_time = toolhead.get_last_move_time()
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stepper.motor_enable(print_time, 0)
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toolhead.dwell(STALL_TIME)
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def manual_move(self, stepper, dist, speed, accel=0.):
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toolhead = self.printer.lookup_object('toolhead')
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print_time = toolhead.get_last_move_time()
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prev_sk = stepper.set_stepper_kinematics(self.stepper_kinematics)
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stepper.set_position((0., 0., 0.))
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accel_t, cruise_t, cruise_v = calc_move_time(dist, speed, accel)
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self.move_fill(self.cmove, print_time, accel_t, cruise_t, accel_t,
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0., 0., 0., dist, 0., 0., 0., cruise_v, accel)
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stepper.step_itersolve(self.cmove)
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stepper.set_stepper_kinematics(prev_sk)
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toolhead.dwell(accel_t + cruise_t + accel_t)
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def _lookup_stepper(self, params):
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name = self.gcode.get_str('STEPPER', params)
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if name not in self.steppers:
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raise self.gcode.error("Unknown stepper %s" % (name,))
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return self.steppers[name]
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cmd_STEPPER_BUZZ_help = "Oscillate a given stepper to help id it"
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def cmd_STEPPER_BUZZ(self, params):
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stepper = self._lookup_stepper(params)
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logging.info("Stepper buzz %s", stepper.get_name())
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was_enable, was_ignore = self.force_enable(stepper)
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toolhead = self.printer.lookup_object('toolhead')
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for i in range(10):
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self.manual_move(stepper, 1., BUZZ_VELOCITY)
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toolhead.dwell(.050)
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self.manual_move(stepper, -1., BUZZ_VELOCITY)
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toolhead.dwell(.450)
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self.restore_enable(stepper, was_enable, was_ignore)
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cmd_FORCE_MOVE_help = "Manually move a stepper; invalidates kinematics"
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def cmd_FORCE_MOVE(self, params):
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stepper = self._lookup_stepper(params)
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distance = self.gcode.get_float('DISTANCE', params)
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speed = self.gcode.get_float('VELOCITY', params, above=0.)
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accel = self.gcode.get_float('ACCEL', params, 0., minval=0.)
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logging.info("FORCE_MOVE %s distance=%.3f velocity=%.3f accel=%.3f",
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stepper.get_name(), distance, speed, accel)
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was_enable, was_ignore = self.force_enable(stepper)
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self.manual_move(stepper, distance, speed, accel)
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self.restore_enable(stepper, True, was_ignore)
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cmd_SET_KINEMATIC_POSITION_help = "Force a low-level kinematic position"
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def cmd_SET_KINEMATIC_POSITION(self, params):
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toolhead = self.printer.lookup_object('toolhead')
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toolhead.get_last_move_time()
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curpos = toolhead.get_position()
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x = self.gcode.get_float('X', params, curpos[0])
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y = self.gcode.get_float('Y', params, curpos[1])
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z = self.gcode.get_float('Z', params, curpos[2])
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logging.info("SET_KINEMATIC_POSITION pos=%.3f,%.3f,%.3f", x, y, z)
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toolhead.set_position([x, y, z, curpos[3]], homing_axes=(0, 1, 2))
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self.gcode.reset_last_position()
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def load_config(config):
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return ForceMove(config)
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