src/Mod/CAM/Path/Base/Generator/tapping.py

# SPDX-License-Identifier: LGPL-2.1-or-later
# ***************************************************************************
# *   Copyright (c) 2021 sliptonic <shopinthewoods@gmail.com>               *
# *   Copyright (c) 2023 luvtofish                                          *
# *                                                                         *
# *   This program is free software; you can redistribute it and/or modify  *
# *   it under the terms of the GNU Lesser General Public License (LGPL)    *
# *   as published by the Free Software Foundation; either version 2 of     *
# *   the License, or (at your option) any later version.                   *
# *   for detail see the LICENSE text file.                                 *
# *                                                                         *
# *   This program is distributed in the hope that it will be useful,       *
# *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
# *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
# *   GNU Library General Public License for more details.                  *
# *                                                                         *
# *   You should have received a copy of the GNU Library General Public     *
# *   License along with this program; if not, write to the Free Software   *
# *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
# *   USA                                                                   *
# *                                                                         *
# ***************************************************************************

import Path
import numpy

__title__ = "Tapping Path Generator"
__author__ = "sliptonic (Brad Collette)"
__url__ = "https://www.freecad.org"
__doc__ = "Generates the Tapping toolpath for a single spotshape"
__contributors__ = "luvtofish (Dan Henderson)"


if False:
    Path.Log.setLevel(Path.Log.Level.DEBUG, Path.Log.thisModule())
    Path.Log.trackModule(Path.Log.thisModule())
else:
    Path.Log.setLevel(Path.Log.Level.INFO, Path.Log.thisModule())


def generate(
    edge,
    dwelltime=0.0,
    repeat=1,
    retractheight=None,
    righthand=True,
    pitch=None,
    spindle_speed=None,
):
    """
    Generates Gcode for tapping a single hole.

    Takes as input an edge. It assumes the edge is trivial with just two vectors.
    The edge must be aligned with the Z axes (Vector(0,0,1)) or it is an error.

    The first vertex of the edge will be the startpoint
    The second vertex of the edge will be the endpoint.
    All other vertices are ignored.

    additionally, you can pass in a dwelltime,and repeat value.

    These will result in appropriate G74 and G84 codes.

    """
    startPoint = edge.Vertexes[0].Point
    endPoint = edge.Vertexes[1].Point

    Path.Log.debug(startPoint)
    Path.Log.debug(endPoint)

    Path.Log.debug(numpy.isclose(startPoint.sub(endPoint).x, 0, rtol=1e-05, atol=1e-06))
    Path.Log.debug(numpy.isclose(startPoint.sub(endPoint).y, 0, rtol=1e-05, atol=1e-06))
    Path.Log.debug(endPoint)

    if repeat < 1:
        raise ValueError("repeat must be 1 or greater")

    if not type(repeat) is int:
        raise ValueError("repeat value must be an integer")

    if not type(dwelltime) is float:
        raise ValueError("dwelltime must be a float")

    if retractheight is not None and not type(retractheight) is float:
        raise ValueError("retractheight must be a float")

    if not (
        numpy.isclose(startPoint.sub(endPoint).x, 0, rtol=1e-05, atol=1e-06)
        and (numpy.isclose(startPoint.sub(endPoint).y, 0, rtol=1e-05, atol=1e-06))
    ):
        raise ValueError("edge is not aligned with Z axis")

    if startPoint.z < endPoint.z:
        raise ValueError("start point is below end point")

    cmdParams = {}
    cmdParams["X"] = startPoint.x
    cmdParams["Y"] = startPoint.y
    cmdParams["Z"] = endPoint.z
    cmdParams["R"] = retractheight if retractheight is not None else startPoint.z
    cmdParams["S"] = spindle_speed if spindle_speed is not None else 1.0  # Sanity default
    cmdParams["F"] = float(pitch) if pitch is not None else 100.0  # Sanity default

    if repeat < 1:
        raise ValueError("repeat must be 1 or greater")

    if not type(repeat) is int:
        raise ValueError("repeat value must be an integer")

    if repeat > 1:
        cmdParams["L"] = repeat

    if dwelltime > 0.0:
        cmdParams["P"] = dwelltime

    # Check if tool is lefthand or righthand, set appropriate G-code
    if not (righthand):
        cmd = "G74"
    else:
        cmd = "G84"

    return [Path.Command(cmd, cmdParams)]