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Tomas Mudrunka edited this page Nov 6, 2018 · 1 revision

Fusion 360 postprocessor for GRBL with bCNC tweaks (blocks, etc...)

THX to @Bologrew #1030

Save following to grbl-bCNC.cps file:

/**
  Copyright (C) 2012-2018 by Autodesk, Inc.
  All rights reserved.

  Grbl post processor configuration.

  $Revision: 42115 bdeb2e221ae970b5318768fc88f8111865513bf5 $
  $Date: 2018-09-06 14:16:13 $
  
  FORKID {154F7C00-6549-4c77-ADE0-79375FE5F2AA}
*/

description = "Grbl (bCNC sections)";
vendor = "grbl";
vendorUrl = "https://github.com/grbl/grbl/wiki";
legal = "Copyright (C) 2012-2018 by Autodesk, Inc.";
certificationLevel = 2;
minimumRevision = 40783;

longDescription = "Generic milling post for Grbl.";

extension = "nc";
setCodePage("ascii");

capabilities = CAPABILITY_MILLING;
tolerance = spatial(0.002, MM);

minimumChordLength = spatial(0.25, MM);
minimumCircularRadius = spatial(0.01, MM);
maximumCircularRadius = spatial(1000, MM);
minimumCircularSweep = toRad(0.01);
maximumCircularSweep = toRad(180);
allowHelicalMoves = true;
allowedCircularPlanes = undefined; // allow any circular motion



// user-defined properties
properties = {
  writeMachine: true, // write machine
  writeTools: true, // writes the tools
  useG28: true, // disable to avoid G28 output for safe machine retracts - when disabled you must manually ensure safe retracts
  showSequenceNumbers: false, // show sequence numbers
  sequenceNumberStart: 10, // first sequence number
  sequenceNumberIncrement: 1, // increment for sequence numbers
  separateWordsWithSpace: true // specifies that the words should be separated with a white space
};

// user-defined property definitions
propertyDefinitions = {
  writeMachine: {title:"Write machine", description:"Output the machine settings in the header of the code.", group:0, type:"boolean"},
  writeTools: {title:"Write tool list", description:"Output a tool list in the header of the code.", group:0, type:"boolean"},
  useG28: {title:"G28 Safe retracts", description:"Disable to avoid G28 output for safe machine retracts. When disabled, you must manually ensure safe retracts.", type:"boolean"},
  showSequenceNumbers: {title:"Use sequence numbers", description:"Use sequence numbers for each block of outputted code.", group:1, type:"boolean"},
  sequenceNumberStart: {title:"Start sequence number", description:"The number at which to start the sequence numbers.", group:1, type:"integer"},
  sequenceNumberIncrement: {title:"Sequence number increment", description:"The amount by which the sequence number is incremented by in each block.", group:1, type:"integer"},
  separateWordsWithSpace: {title:"Separate words with space", description:"Adds spaces between words if 'yes' is selected.", type:"boolean"}
};

var numberOfToolSlots = 9999;

// samples:
// throughTool: {on: 88, off: 89}
// throughTool: {on: [8, 88], off: [9, 89]}
var coolants = {
  flood: {on: 8},
  mist: {},
  throughTool: {},
  air: {},
  airThroughTool: {},
  suction: {},
  floodMist: {},
  floodThroughTool: {},
  off: 9
};

var gFormat = createFormat({prefix:"G", decimals:0});
var mFormat = createFormat({prefix:"M", decimals:0});

var xyzFormat = createFormat({decimals:(unit == MM ? 3 : 4)});
var feedFormat = createFormat({decimals:(unit == MM ? 1 : 2)});
var toolFormat = createFormat({decimals:0});
var rpmFormat = createFormat({decimals:0});
var secFormat = createFormat({decimals:3, forceDecimal:true}); // seconds - range 0.001-1000
var taperFormat = createFormat({decimals:1, scale:DEG});

var xOutput = createVariable({prefix:"X"}, xyzFormat);
var yOutput = createVariable({prefix:"Y"}, xyzFormat);
var zOutput = createVariable({onchange:function () {retracted = false;}, prefix:"Z"}, xyzFormat);
var feedOutput = createVariable({prefix:"F"}, feedFormat);
var sOutput = createVariable({prefix:"S", force:true}, rpmFormat);

// circular output
var iOutput = createReferenceVariable({prefix:"I"}, xyzFormat);
var jOutput = createReferenceVariable({prefix:"J"}, xyzFormat);
var kOutput = createReferenceVariable({prefix:"K"}, xyzFormat);

var gMotionModal = createModal({}, gFormat); // modal group 1 // G0-G3, ...
var gPlaneModal = createModal({onchange:function () {gMotionModal.reset();}}, gFormat); // modal group 2 // G17-19
var gAbsIncModal = createModal({}, gFormat); // modal group 3 // G90-91
var gFeedModeModal = createModal({}, gFormat); // modal group 5 // G93-94
var gUnitModal = createModal({}, gFormat); // modal group 6 // G20-21

var WARNING_WORK_OFFSET = 0;

// collected state
var sequenceNumber;
var currentWorkOffset;
var retracted = false; // specifies that the tool has been retracted to the safe plane

/**
  Writes the specified block.
*/
function writeBlock() {
  var text = formatWords(arguments);
  if (!text) {
    return;
  }
  if (properties.showSequenceNumbers) {
    writeWords2("N" + sequenceNumber, arguments);
    sequenceNumber += properties.sequenceNumberIncrement;
  } else {
    writeWords(arguments);
  }
}

function formatComment(text) {
  return "(" + String(text).replace(/[()]/g, "") + ")";
}

/**
  Output a comment.
*/
function writeComment(text) {
  writeln(formatComment(text));
}

function onOpen() {
  if (!properties.separateWordsWithSpace) {
    setWordSeparator("");
  }

  sequenceNumber = properties.sequenceNumberStart;

// bCNC
  writeComment("Block-name: Header");
  writeComment("Block-expand: 1");
  writeComment("Block-enable: 1");

  writeln("%");


  if (programName) {
    writeComment(programName);
  }
  if (programComment) {
    writeComment(programComment);
  }

  // dump machine configuration
  var vendor = machineConfiguration.getVendor();
  var model = machineConfiguration.getModel();
  var description = machineConfiguration.getDescription();

  if (properties.writeMachine && (vendor || model || description)) {
    writeComment(localize("Machine"));
    if (vendor) {
      writeComment("  " + localize("vendor") + ": " + vendor);
    }
    if (model) {
      writeComment("  " + localize("model") + ": " + model);
    }
    if (description) {
      writeComment("  " + localize("description") + ": "  + description);
    }
  }

  // dump tool information
  if (properties.writeTools) {
    var zRanges = {};
    if (is3D()) {
      var numberOfSections = getNumberOfSections();
      for (var i = 0; i < numberOfSections; ++i) {
        var section = getSection(i);
        var zRange = section.getGlobalZRange();
        var tool = section.getTool();
        if (zRanges[tool.number]) {
          zRanges[tool.number].expandToRange(zRange);
        } else {
          zRanges[tool.number] = zRange;
        }
      }
    }

    var tools = getToolTable();
    if (tools.getNumberOfTools() > 0) {
      for (var i = 0; i < tools.getNumberOfTools(); ++i) {
        var tool = tools.getTool(i);
        var comment = "T" + toolFormat.format(tool.number) + "  " +
          "D=" + xyzFormat.format(tool.diameter) + " " +
          localize("CR") + "=" + xyzFormat.format(tool.cornerRadius);
        if ((tool.taperAngle > 0) && (tool.taperAngle < Math.PI)) {
          comment += " " + localize("TAPER") + "=" + taperFormat.format(tool.taperAngle) + localize("deg");
        }
        if (zRanges[tool.number]) {
          comment += " - " + localize("ZMIN") + "=" + xyzFormat.format(zRanges[tool.number].getMinimum());
        }
        comment += " - " + getToolTypeName(tool.type);
        writeComment(comment);
      }
    }
  }

  if ((getNumberOfSections() > 0) && (getSection(0).workOffset == 0)) {
    for (var i = 0; i < getNumberOfSections(); ++i) {
      if (getSection(i).workOffset > 0) {
        error(localize("Using multiple work offsets is not possible if the initial work offset is 0."));
        return;
      }
    }
  }

  // absolute coordinates and feed per min
  writeBlock(gAbsIncModal.format(90), gFeedModeModal.format(94));
  writeBlock(gPlaneModal.format(17));

  switch (unit) {
  case IN:
    writeBlock(gUnitModal.format(20));
    break;
  case MM:
    writeBlock(gUnitModal.format(21));
    break;
  }
}

function onComment(message) {
  writeComment(message);
}

/** Force output of X, Y, and Z. */
function forceXYZ() {
  xOutput.reset();
  yOutput.reset();
  zOutput.reset();
}

/** Force output of X, Y, Z, and F on next output. */
function forceAny() {
  forceXYZ();
  feedOutput.reset();
}

function isProbeOperation() {
  return hasParameter("operation-strategy") &&
    (getParameter("operation-strategy") == "probe");
}

function onSection() {
  var insertToolCall = isFirstSection() ||
    currentSection.getForceToolChange && currentSection.getForceToolChange() ||
    (tool.number != getPreviousSection().getTool().number);
  
  retracted = false; // specifies that the tool has been retracted to the safe plane
  var newWorkOffset = isFirstSection() ||
    (getPreviousSection().workOffset != currentSection.workOffset); // work offset changes
  var newWorkPlane = isFirstSection() ||
    !isSameDirection(getPreviousSection().getGlobalFinalToolAxis(), currentSection.getGlobalInitialToolAxis()) ||
    (currentSection.isOptimizedForMachine() && getPreviousSection().isOptimizedForMachine() &&
      Vector.diff(getPreviousSection().getFinalToolAxisABC(), currentSection.getInitialToolAxisABC()).length > 1e-4) ||
    (!machineConfiguration.isMultiAxisConfiguration() && currentSection.isMultiAxis()) ||
    (!getPreviousSection().isMultiAxis() && currentSection.isMultiAxis() ||
      getPreviousSection().isMultiAxis() && !currentSection.isMultiAxis()); // force newWorkPlane between indexing and simultaneous operations
  if (insertToolCall || newWorkOffset || newWorkPlane) {
    var nextTool = getNextTool(tool.number);
    if (nextTool) {
      writeBlock("T" + toolFormat.format(nextTool.number));
    }
    // stop spindle before retract during tool change
    if (insertToolCall && !isFirstSection()) {
      onCommand(COMMAND_STOP_SPINDLE);
    }

    writeRetract(Z);
  }

  writeln("");
  
  if (hasParameter("operation-comment")) {
    var comment = getParameter("operation-comment");
    if (comment) {
// bCNC sections
      writeComment("Block-name: " + comment);
      writeComment("Block-expand: 0");
      writeComment("Block-enable: 1");
    }
  }

  if (insertToolCall) {
    setCoolant(COOLANT_OFF);

    if (tool.number > numberOfToolSlots) {
      warning(localize("Tool number exceeds maximum value."));
    }

    writeBlock("T" + toolFormat.format(tool.number), mFormat.format(6));
    if (tool.comment) {
      writeComment(tool.comment);
    }
    var showToolZMin = false;
    if (showToolZMin) {
      if (is3D()) {
        var numberOfSections = getNumberOfSections();
        var zRange = currentSection.getGlobalZRange();
        var number = tool.number;
        for (var i = currentSection.getId() + 1; i < numberOfSections; ++i) {
          var section = getSection(i);
          if (section.getTool().number != number) {
            break;
          }
          zRange.expandToRange(section.getGlobalZRange());
        }
        writeComment(localize("ZMIN") + "=" + zRange.getMinimum());
      }
    }
  }
  
  if (insertToolCall ||
      isFirstSection() ||
      (rpmFormat.areDifferent(spindleSpeed, sOutput.getCurrent())) ||
      (tool.clockwise != getPreviousSection().getTool().clockwise)) {
    if (spindleSpeed < 1) {
      error(localize("Spindle speed out of range."));
    }
    if (spindleSpeed > 99999) {
      warning(localize("Spindle speed exceeds maximum value."));
    }
    writeBlock(
      sOutput.format(spindleSpeed), mFormat.format(tool.clockwise ? 3 : 4)
    );
  }

  // wcs
  if (insertToolCall) { // force work offset when changing tool
    currentWorkOffset = undefined;
  }
  var workOffset = currentSection.workOffset;
  if (workOffset == 0) {
    warningOnce(localize("Work offset has not been specified. Using G54 as WCS."), WARNING_WORK_OFFSET);
    workOffset = 1;
  }
  if (workOffset > 0) {
    if (workOffset > 6) {
      error(localize("Work offset out of range."));
      return;
    } else {
      if (workOffset != currentWorkOffset) {
        writeBlock(gFormat.format(53 + workOffset)); // G54->G59
        currentWorkOffset = workOffset;
      }
    }
  }

  forceXYZ();

  { // pure 3D
    var remaining = currentSection.workPlane;
    if (!isSameDirection(remaining.forward, new Vector(0, 0, 1))) {
      error(localize("Tool orientation is not supported."));
      return;
    }
    setRotation(remaining);
  }

  // set coolant after we have positioned at Z
  setCoolant(tool.coolant);

  forceAny();

  var initialPosition = getFramePosition(currentSection.getInitialPosition());
  if (!retracted) {
    if (getCurrentPosition().z < initialPosition.z) {
      writeBlock(gMotionModal.format(0), zOutput.format(initialPosition.z));
    }
  }

  if (insertToolCall || retracted) {
    var lengthOffset = tool.lengthOffset;
    if (lengthOffset > numberOfToolSlots) {
      error(localize("Length offset out of range."));
      return;
    }

    gMotionModal.reset();
    writeBlock(gPlaneModal.format(17));

    if (!machineConfiguration.isHeadConfiguration()) {
      writeBlock(
        gAbsIncModal.format(90),
        gMotionModal.format(0), xOutput.format(initialPosition.x), yOutput.format(initialPosition.y)
      );
      writeBlock(gMotionModal.format(0), zOutput.format(initialPosition.z));
    } else {
      writeBlock(
        gAbsIncModal.format(90),
        gMotionModal.format(0),
        xOutput.format(initialPosition.x),
        yOutput.format(initialPosition.y),
        zOutput.format(initialPosition.z)
      );
    }
  } else {
    writeBlock(
      gAbsIncModal.format(90),
      gMotionModal.format(0),
      xOutput.format(initialPosition.x),
      yOutput.format(initialPosition.y)
    );
  }
}

function onDwell(seconds) {
  if (seconds > 99999.999) {
    warning(localize("Dwelling time is out of range."));
  }
  seconds = clamp(0.001, seconds, 99999.999);
  writeBlock(gFormat.format(4), "P" + secFormat.format(seconds));
}

function onSpindleSpeed(spindleSpeed) {
  writeBlock(sOutput.format(spindleSpeed));
}

var pendingRadiusCompensation = -1;

function onRadiusCompensation() {
  pendingRadiusCompensation = radiusCompensation;
}

function onRapid(_x, _y, _z) {
  var x = xOutput.format(_x);
  var y = yOutput.format(_y);
  var z = zOutput.format(_z);
  if (x || y || z) {
    if (pendingRadiusCompensation >= 0) {
      error(localize("Radius compensation mode cannot be changed at rapid traversal."));
      return;
    }
    writeBlock(gMotionModal.format(0), x, y, z);
    feedOutput.reset();
  }
}

function onLinear(_x, _y, _z, feed) {
  // at least one axis is required
  if (pendingRadiusCompensation >= 0) {
    // ensure that we end at desired position when compensation is turned off
    xOutput.reset();
    yOutput.reset();
  }
  var x = xOutput.format(_x);
  var y = yOutput.format(_y);
  var z = zOutput.format(_z);
  var f = feedOutput.format(feed);
  if (x || y || z) {
    if (pendingRadiusCompensation >= 0) {
      error(localize("Radius compensation mode is not supported."));
      return;
    } else {
      writeBlock(gMotionModal.format(1), x, y, z, f);
    }
  } else if (f) {
    if (getNextRecord().isMotion()) { // try not to output feed without motion
      feedOutput.reset(); // force feed on next line
    } else {
      writeBlock(gMotionModal.format(1), f);
    }
  }
}

function onRapid5D(_x, _y, _z, _a, _b, _c) {
  error(localize("Multi-axis motion is not supported."));
}

function onLinear5D(_x, _y, _z, _a, _b, _c, feed) {
  error(localize("Multi-axis motion is not supported."));
}

function onCircular(clockwise, cx, cy, cz, x, y, z, feed) {
  // one of X/Y and I/J are required and likewise
  
  if (pendingRadiusCompensation >= 0) {
    error(localize("Radius compensation cannot be activated/deactivated for a circular move."));
    return;
  }

  var start = getCurrentPosition();

  if (isFullCircle()) {
    if (isHelical()) {
      linearize(tolerance);
      return;
    }
    switch (getCircularPlane()) {
    case PLANE_XY:
      writeBlock(gPlaneModal.format(17), gMotionModal.format(clockwise ? 2 : 3), xOutput.format(x), iOutput.format(cx - start.x, 0), jOutput.format(cy - start.y, 0), feedOutput.format(feed));
      break;
    case PLANE_ZX:
      writeBlock(gPlaneModal.format(18), gMotionModal.format(clockwise ? 2 : 3), zOutput.format(z), iOutput.format(cx - start.x, 0), kOutput.format(cz - start.z, 0), feedOutput.format(feed));
      break;
    case PLANE_YZ:
      writeBlock(gPlaneModal.format(19), gMotionModal.format(clockwise ? 2 : 3), yOutput.format(y), jOutput.format(cy - start.y, 0), kOutput.format(cz - start.z, 0), feedOutput.format(feed));
      break;
    default:
      linearize(tolerance);
    }
  } else {
    switch (getCircularPlane()) {
    case PLANE_XY:
      writeBlock(gPlaneModal.format(17), gMotionModal.format(clockwise ? 2 : 3), xOutput.format(x), yOutput.format(y), zOutput.format(z), iOutput.format(cx - start.x, 0), jOutput.format(cy - start.y, 0), feedOutput.format(feed));
      break;
    case PLANE_ZX:
      writeBlock(gPlaneModal.format(18), gMotionModal.format(clockwise ? 2 : 3), xOutput.format(x), yOutput.format(y), zOutput.format(z), iOutput.format(cx - start.x, 0), kOutput.format(cz - start.z, 0), feedOutput.format(feed));
      break;
    case PLANE_YZ:
      writeBlock(gPlaneModal.format(19), gMotionModal.format(clockwise ? 2 : 3), xOutput.format(x), yOutput.format(y), zOutput.format(z), jOutput.format(cy - start.y, 0), kOutput.format(cz - start.z, 0), feedOutput.format(feed));
      break;
    default:
      linearize(tolerance);
    }
  }
}

var mapCommand = {
  COMMAND_STOP:0,
  COMMAND_END:2,
  COMMAND_SPINDLE_CLOCKWISE:3,
  COMMAND_SPINDLE_COUNTERCLOCKWISE:4,
  COMMAND_STOP_SPINDLE:5
};

function onCommand(command) {
  switch (command) {
  case COMMAND_START_SPINDLE:
    onCommand(tool.clockwise ? COMMAND_SPINDLE_CLOCKWISE : COMMAND_SPINDLE_COUNTERCLOCKWISE);
    return;
  case COMMAND_LOCK_MULTI_AXIS:
    return;
  case COMMAND_UNLOCK_MULTI_AXIS:
    return;
  case COMMAND_BREAK_CONTROL:
    return;
  case COMMAND_TOOL_MEASURE:
    return;
  }

  var stringId = getCommandStringId(command);
  var mcode = mapCommand[stringId];
  if (mcode != undefined) {

// bCNC
    if (mcode == 0) {
      writeln("");
      writeComment("Block-name: Stop-M0");
      writeComment("Block-expand: 0");
      writeComment("Block-enable: 1");
      writeBlock(mFormat.format(mcode));
    } else {
      writeBlock(mFormat.format(mcode));
    }
  } else {
    onUnsupportedCommand(command);
  }
}

function onSectionEnd() {
  writeBlock(gPlaneModal.format(17));
  forceAny();
}

/** Output block to do safe retract and/or move to home position. */
function writeRetract() {
  // initialize routine
  var _xyzMoved = new Array(false, false, false);
  var _useG28 = properties.useG28; // can be either true or false

  // check syntax of call
  if (arguments.length == 0) {
    error(localize("No axis specified for writeRetract()."));
    return;
  }
  for (var i = 0; i < arguments.length; ++i) {
    if ((arguments[i] < 0) || (arguments[i] > 2)) {
      error(localize("Bad axis specified for writeRetract()."));
      return;
    }
    if (_xyzMoved[arguments[i]]) {
      error(localize("Cannot retract the same axis twice in one line"));
      return;
    }
    _xyzMoved[arguments[i]] = true;
  }
  
  // special conditions
  // none

  // define home positions
  var _xHome;
  var _yHome;
  var _zHome;
  if (_useG28) {
    _xHome = 0;
    _yHome = 0;
    _zHome = 0;
  } else {
    _xHome = machineConfiguration.hasHomePositionX() ? machineConfiguration.getHomePositionX() : 0;
    _yHome = machineConfiguration.hasHomePositionY() ? machineConfiguration.getHomePositionY() : 0;
    _zHome = machineConfiguration.getRetractPlane();
  }

  // format home positions
  var words = []; // store all retracted axes in an array
  for (var i = 0; i < arguments.length; ++i) {
    // define the axes to move
    switch (arguments[i]) {
    case X:
      if (machineConfiguration.hasHomePositionX() || _useG28) {
        words.push("X" + xyzFormat.format(_xHome));
      }
      break;
    case Y:
      if (machineConfiguration.hasHomePositionX() || _useG28) {
        words.push("Y" + xyzFormat.format(_yHome));
      }
      break;
    case Z:
      if (_useG28) {
        words.push("Z" + xyzFormat.format(_zHome));
        retracted = true;
      }
      break;
    }
  }

  // output move to home
  if (words.length > 0) {
    if (_useG28) {
      gAbsIncModal.reset();
      writeBlock(gFormat.format(28), gAbsIncModal.format(91), words);
      writeBlock(gAbsIncModal.format(90));
    } else {
      gMotionModal.reset();
      writeBlock(gAbsIncModal.format(90), gFormat.format(53), gMotionModal.format(0), words);
    }

    // force any axes that move to home on next block
    if (_xyzMoved[0]) {
      xOutput.reset();
    }
    if (_xyzMoved[1]) {
      yOutput.reset();
    }
    if (_xyzMoved[2]) {
      zOutput.reset();
    }
  }
}

var currentCoolantMode = undefined;
var coolantOff = undefined;

function setCoolant(coolant) {
  var coolantCodes = getCoolantCodes(coolant);
  if (Array.isArray(coolantCodes)) {
    for (var c in coolantCodes) {
      writeBlock(coolantCodes[c]);
    }
    return undefined;
  }
  return coolantCodes;
}

function getCoolantCodes(coolant) {
  if (!coolants) {
    error(localize("Coolants have not been defined."));
  }
  if (!coolantOff) { // use the default coolant off command when an 'off' value is not specified for the previous coolant mode
    coolantOff = coolants.off;
  }

  if (isProbeOperation()) { // avoid coolant output for probing
    coolant = COOLANT_OFF;
  }

  if (coolant == currentCoolantMode) {
    return undefined; // coolant is already active
  }

  var multipleCoolantBlocks = new Array(); // create a formatted array to be passed into the outputted line
  if ((coolant != COOLANT_OFF) && (currentCoolantMode != COOLANT_OFF)) {
    multipleCoolantBlocks.push(mFormat.format(coolantOff));
  }

  var m;
  if (coolant == COOLANT_OFF) {
    m = coolantOff;
    coolantOff = coolants.off;
  }

  switch (coolant) {
  case COOLANT_FLOOD:
    if (!coolants.flood) {
      break;
    }
    m = coolants.flood.on;
    coolantOff = coolants.flood.off;
    break;
  case COOLANT_THROUGH_TOOL:
    if (!coolants.throughTool) {
      break;
    }
    m = coolants.throughTool.on;
    coolantOff = coolants.throughTool.off;
    break;
  case COOLANT_AIR:
    if (!coolants.air) {
      break;
    }
    m = coolants.air.on;
    coolantOff = coolants.air.off;
    break;
  case COOLANT_AIR_THROUGH_TOOL:
    if (!coolants.airThroughTool) {
      break;
    }
    m = coolants.airThroughTool.on;
    coolantOff = coolants.airThroughTool.off;
    break;
  case COOLANT_FLOOD_MIST:
    if (!coolants.floodMist) {
      break;
    }
    m = coolants.floodMist.on;
    coolantOff = coolants.floodMist.off;
    break;
  case COOLANT_MIST:
    if (!coolants.mist) {
      break;
    }
    m = coolants.mist.on;
    coolantOff = coolants.mist.off;
    break;
  case COOLANT_SUCTION:
    if (!coolants.suction) {
      break;
    }
    m = coolants.suction.on;
    coolantOff = coolants.suction.off;
    break;
  case COOLANT_FLOOD_THROUGH_TOOL:
    if (!coolants.floodThroughTool) {
      break;
    }
    m = coolants.floodThroughTool.on;
    coolantOff = coolants.floodThroughTool.off;
    break;
  }
  
  if (!m) {
    onUnsupportedCoolant(coolant);
    m = 9;
  }

  if (m) {
    if (Array.isArray(m)) {
      for (var i in m) {
        multipleCoolantBlocks.push(mFormat.format(m[i]));
      }
    } else {
      multipleCoolantBlocks.push(mFormat.format(m));
    }
    currentCoolantMode = coolant;
    return multipleCoolantBlocks; // return the single formatted coolant value
  }
  return undefined;
}

function onClose() {

// bCNC sections
  writeln("");
  writeComment("Block-name: Footer");
  writeComment("Block-expand: 0");
  writeComment("Block-enable: 1");

  setCoolant(COOLANT_OFF);

  writeRetract(Z);

  writeRetract(X, Y);

  onImpliedCommand(COMMAND_END);
  onImpliedCommand(COMMAND_STOP_SPINDLE);
  writeBlock(mFormat.format(30)); // stop program, spindle stop, coolant off
  writeln("%");
}
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