93 lines
4.1 KiB
Python
93 lines
4.1 KiB
Python
# Helper script to adjust bed screws tilt using Z probe
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#
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# Copyright (C) 2019 Rui Caridade <rui.mcbc@gmail.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 math
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import probe
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def parse_coord(config, param):
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pair = config.get(param).strip().split(',', 1)
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try:
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return (float(pair[0]), float(pair[1]))
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except:
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raise config.error("%s:%s needs to be an x,y coordinate" % (
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config.get_name(), param))
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class ScrewsTiltAdjust:
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def __init__(self, config):
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self.config = config
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self.printer = config.get_printer()
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self.screws = []
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# Read config
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for i in range(99):
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prefix = "screw%d" % (i + 1,)
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if config.get(prefix, None) is None:
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break
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screw_coord = parse_coord(config, prefix)
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screw_name = "screw at %.3f,%.3f" % screw_coord
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screw_name = config.get(prefix + "_name", screw_name)
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self.screws.append((screw_coord, screw_name))
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if len(self.screws) < 3:
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raise config.error("screws_tilt_adjust: Must have "
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"at least three screws")
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self.threads = {'CW-M3': 0, 'CCW-M3': 1, 'CW-M4': 2, 'CCW-M4': 3,
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'CW-M5': 4, 'CCW-M5': 5}
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self.thread = config.getchoice('screw_thread', self.threads,
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default='CW-M3')
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# Initialize ProbePointsHelper
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points = [coord for coord, name in self.screws]
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self.probe_helper = probe.ProbePointsHelper(self.config,
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self.probe_finalize,
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default_points=points)
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self.probe_helper.minimum_points(3)
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# Register command
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self.gcode = self.printer.lookup_object('gcode')
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self.gcode.register_command("SCREWS_TILT_CALCULATE",
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self.cmd_SCREWS_TILT_CALCULATE,
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desc=self.cmd_SCREWS_TILT_CALCULATE_help)
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cmd_SCREWS_TILT_CALCULATE_help = "Tool to help adjust bed leveling " \
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"screws by calculating the number " \
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"of turns to level it."
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def cmd_SCREWS_TILT_CALCULATE(self, params):
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self.probe_helper.start_probe(params)
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def probe_finalize(self, offsets, positions):
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# Factors used for CW-M3, CCW-M3, CW-M4, CCW-M4, CW-M5 and CCW-M5
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threads_factor = {0: 0.5, 1: 0.5, 2: 0.7, 3: 0.7, 4: 0.8, 5: 0.8}
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# Process the read Z values and
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for i, screw in enumerate(self.screws):
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if i == 0:
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# First screw is the base position used for comparison
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z_base = positions[i][2]
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coord_base, name_base = screw
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# Show the results
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self.gcode.respond_info("%s (Base): X %.1f, Y %.1f, Z %.5f" %
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(name_base, coord_base[0],
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coord_base[1], z_base))
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else:
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# Calculate how knob must me adjusted for other positions
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z = positions[i][2]
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coord, name = screw
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diff = z_base - z
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if abs(diff) < 0.001:
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adjust = 0
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else:
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adjust = diff / threads_factor.get(self.thread, 0.5)
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if (self.thread & 1) == 1:
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sign = "CW" if adjust < 0 else "CCW"
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else:
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sign = "CCW" if adjust < 0 else "CW"
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full_turns = math.trunc(adjust)
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decimal_part = adjust - full_turns
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minutes = round(decimal_part * 60, 0)
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# Show the results
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self.gcode.respond_info("%s : X %.1f, Y %.1f, Z %.5f : "
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"Adjust -> %s %02d:%02d" %
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(name, coord[0], coord[1], z, sign,
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abs(full_turns), abs(minutes)))
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def load_config(config):
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return ScrewsTiltAdjust(config)
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