CAM: Add rigid Tapping back to legacy LinuxCNC postprocessor
This PR adds rigid tapping back to the legacy LinuxCNC postprocessor, which was removed in commit cd1c29e3f23fde0a90980ffcf3e70406769f2d43 in PR 24771. The changes include: - Modifying the linuxcnc_legacy_post.py script to include logic for Rigid tapping - Updating comments and documentation to reflect the addition of Rigid tapping
This commit is contained in:
Billy Huddleston
@@ -1,3 +1,5 @@
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# SPDX-License-Identifier: LGPL-2.1-or-later
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# ***************************************************************************
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# * Copyright (c) 2014 sliptonic <shopinthewoods@gmail.com> *
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# * *
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@@ -77,6 +79,7 @@ parser.add_argument(
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action="store_true",
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help="suppress tool length offset (G43) following tool changes",
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)
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parser.add_argument("--rigid-tap", action="store_true", help="Enable G33.1 rigid tapping cycle")
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TOOLTIP_ARGS = parser.format_help()
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@@ -101,6 +104,8 @@ CORNER_MIN = {"x": 0, "y": 0, "z": 0}
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CORNER_MAX = {"x": 500, "y": 300, "z": 300}
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PRECISION = 3
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RIGID_TAP = False
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# Preamble text will appear at the beginning of the GCODE output file.
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PREAMBLE = """G17 G54 G40 G49 G80 G90
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"""
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@@ -135,6 +140,7 @@ def processArguments(argstring):
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global MODAL
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global USE_TLO
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global OUTPUT_DOUBLES
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global RIGID_TAP
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try:
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args = parser.parse_args(shlex.split(argstring))
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@@ -164,6 +170,8 @@ def processArguments(argstring):
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if args.axis_modal:
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print("here")
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OUTPUT_DOUBLES = False
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if args.rigid_tap:
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RIGID_TAP = True
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except Exception:
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return False
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@@ -347,6 +355,15 @@ def parse(pathobj):
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if c.Name.startswith("(") and not OUTPUT_COMMENTS: # command is a comment
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continue
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# Check for G80, G98, G99 with rigid tapping and annotation
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if (
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command in ("G80", "G98", "G99")
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and RIGID_TAP
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and hasattr(c, "Annotations")
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and c.Annotations.get("operation") == "tapping"
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):
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continue # Skip this command
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# Handle G84/G74 tapping cycles
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if command in ("G84", "G74") and "F" in c.Parameters:
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pitch_mm = float(c.Parameters["F"])
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@@ -364,16 +381,77 @@ def parse(pathobj):
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else:
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pitch = pitch_mm
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# Calculate feed rate
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if spindle_speed is not None:
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feed_rate = pitch * spindle_speed
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speed = Units.Quantity(feed_rate, UNIT_SPEED_FORMAT)
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outstring.append(
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"F" + format(float(speed.getValueAs(UNIT_SPEED_FORMAT)), precision_string)
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)
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# Rigid tapping logic
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if RIGID_TAP:
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# Output initial tapping command
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outstring[0] = "G33.1"
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outstring.append("K" + format(pitch, precision_string))
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if "Z" in c.Parameters:
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outstring.append("Z" + format(float(c.Parameters["Z"]), precision_string))
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# Output the tapping line
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if len(outstring) >= 1:
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if OUTPUT_LINE_NUMBERS:
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outstring.insert(0, (linenumber()))
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for w in outstring:
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out += w + COMMAND_SPACE
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out += "\n"
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if "P" in c.Parameters:
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# Issue spindle stop
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out += linenumber() + "M5\n"
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# Issue dwell with P value
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out += linenumber() + f"G04 P{c.Parameters['P']}\n"
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# Now handle reverse out and spindle restore
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if command == "G84":
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# Reverse spindle (M4) with spindle speed
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out += linenumber() + "M4\n"
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# Repeat tapping command to reverse out, use R for Z
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reverse_z = c.Parameters.get("R")
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if reverse_z is not None:
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pos = Units.Quantity(reverse_z, FreeCAD.Units.Length)
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reverse_z = float(pos.getValueAs(UNIT_FORMAT))
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out += (
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linenumber()
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+ f"G33.1 K{format(pitch, precision_string)} Z{format(float(reverse_z), precision_string)}\n"
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)
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else:
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out += linenumber() + f"G33.1 K{format(pitch, precision_string)}\n"
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# Restore original spindle direction (M3) with spindle speed
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out += linenumber() + "M3\n"
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elif command == "G74":
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# Forward spindle (M3) with spindle speed
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out += linenumber() + "M3\n"
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# Repeat tapping command to reverse out, use R for Z
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reverse_z = c.Parameters.get("R")
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if reverse_z is not None:
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pos = Units.Quantity(reverse_z, FreeCAD.Units.Length)
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reverse_z = float(pos.getValueAs(UNIT_FORMAT))
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out += (
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linenumber()
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+ f"G33.1 K{format(pitch, precision_string)} Z{format(float(reverse_z), precision_string)}\n"
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)
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else:
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out += linenumber() + f"G33.1 K{format(pitch, precision_string)}\n"
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# Restore original spindle direction (M4) with spindle speed
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out += linenumber() + "M4\n"
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continue # Skip the rest of the parameter output for this command
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else:
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# No spindle speed found, output pitch as F
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outstring.append("F" + format(pitch, precision_string))
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# Calculate feed rate
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if spindle_speed is not None:
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feed_rate = pitch * spindle_speed
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speed = Units.Quantity(feed_rate, UNIT_SPEED_FORMAT)
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outstring.append(
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"F"
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+ format(float(speed.getValueAs(UNIT_SPEED_FORMAT)), precision_string)
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)
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else:
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# No spindle speed found, output pitch as F
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outstring.append("F" + format(pitch, precision_string))
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# Now add the remaining parameters in order
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for param in params:
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