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<article data-uid="Release-Upgrading-ClPlayback">
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<h1 id="cutter-location-cl-playback-and-cl-to-nc">Cutter-location (CL) playback and CL-to-NC</h1>
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<ul>
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<li><strong>Replay an NX CLSF / APT-source toolpath directly.</strong>
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<a class="xref" href="../../api/Hi.MachiningProcs.SessionShell.html#Hi_MachiningProcs_SessionShell_PlayClFile_">PlayClFile</a> reads <code>MSYS</code> / <code>FROM</code> / <code>GOTO</code> / <code>CIRCLE</code> /
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<code>RAPID</code> / <code>FEDRAT</code> / <code>SPINDL</code> / <code>COOLNT</code> / <code>TLDATA</code> / <code>LOAD</code>. The parser is the
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<a class="xref" href="../../api/Hi.Numerical.ClsfParsers.NxClRunner.html">NxClRunner</a> preset — a <a class="xref" href="../../api/Hi.NcParsers.SoftNcRunner.html">SoftNcRunner</a> composition —
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and the project holds a third runner suit <a class="xref" href="../../api/Hi.MachiningProcs.MachiningProject.html#Hi_MachiningProcs_MachiningProject_ClsfRunnerSuit">ClsfRunnerSuit</a>
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beside the NC and CSV suits. A <code>TLDATA</code> record creates the tool geometry when the tool house has no
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matching id. Run-ops are first class: <a class="xref" href="../../api/Hi.MachiningSteps.IMachiningService.html#Hi_MachiningSteps_IMachiningService_ClRunner">ClRunner</a>,
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<code>MachiningSession.PlayClFile</code> / <code>RunClFile</code>. See
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<a class="xref" href="../../technique/scripting/cutter-location-playback.html">Cutter-Location (CL) Playback</a>.</li>
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<li><strong>A CL file can now drive a machine-tool chain</strong>, not only a
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<a class="xref" href="../../api/HiMachining.Milling.ClMillingDevice.html">ClMillingDevice</a>. When the pipeline's kinematics dependency resolves to a
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live solver, <a class="xref" href="../../api/Hi.Numerical.ClsfParsers.ClToMcTransformSyntax.html">ClToMcTransformSyntax</a> inverse-solves every CLSF motion
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endpoint at parse time and expresses the result in the same <code>ProgramToMcTransform</code> vocabulary the NC
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pipeline uses — a tool-height entry from the active tool, a pivot entry anchored to the workpiece
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frame, and the solved rotary axes in raw degrees for the cyclic wrap tail-pass — so <code>McLinear</code> and
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the wrap are reused unchanged. Played onto a <code>ClMillingDevice</code> the same file is still pure
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cutter-location motion, which is what you want for verifying a CAM toolpath before any post-processor
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is involved.</li>
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<li><strong>CL moves resample along the true path.</strong> <a class="xref" href="../../api/Hi.Numerical.Acts.ActUtil.html#Hi_Numerical_Acts_ActUtil_GetClSteps_">GetClSteps</a> walks
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<code>IClPath.At</code> for each intermediate step rather than linearly interpolating between the path's begin
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and end, so a CL arc actually curves and the tool axis rotates <em>along</em> the path instead of through
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it. <a class="xref" href="../../api/Hi.CutterLocations.ClPath.ClLinear.html">ClLinear</a> gained two guards on the same path: the near-parallel
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begin/end normal case short-circuits instead of falling into a degenerate cross product that yielded
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a NaN rotation axis, and the interpolation reads its rotation delta through the lazily-built property
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rather than a still-null backing field.</li>
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<li><strong>CL tool changes teleport instead of stepping.</strong> A stepping change stamps collision detection and
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volume removal at the chain's current pose, and at CL session start that pose is identity — the tool
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sitting at program zero inside the workpiece. The CSV pipeline's teleporting semantic is promoted to
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the shared <a class="xref" href="../../api/Hi.NcParsers.Semantics.ToolingTeleportSemantic.html">ToolingTeleportSemantic</a> (the old <code>CsvToolingTeleportSemantic</code>
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element name is kept as a load-only alias), and the first <code>GOTO</code> after a <code>LOAD</code> / <code>TOOL</code> is forced
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into a reposition so a new tool never sweeps a cut from the previous operation's endpoint.</li>
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<li><strong>Convert a played CL program into Fanuc NC files.</strong>
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<a class="xref" href="../../api/Hi.MachiningProcs.SessionShell.html#Hi_MachiningProcs_SessionShell_ConvertClToNcFiles_">ConvertClToNcFiles</a>, its HTTP action, and the
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<code>LocalProjectService</code> / <code>MachiningSession</code> entry points walk the session's final syntax-piece layer,
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group pieces per source file and write one NC file per source, template-substituting <code>[NcName]</code>
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(default <code>Output/[NcName].nc</code>). It requires a prior play on a machine chain — a pure-CL device leaves
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no machine-solved sections to serialize — and reports <code>ConvertClToNc--NoPlay</code> otherwise. Stage-one
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results are retained in <a class="xref" href="../../api/Hi.MachiningProcs.MachiningSession.html#Hi_MachiningProcs_MachiningSession_NcConversions">NcConversions</a> as the hook for
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source↔output cross-navigation. A mission can declare the writeback through
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<a class="xref" href="../../api/Hi.SessionCommands.PostExecutionCommand.html#Hi_SessionCommands_PostExecutionCommand_EnableConvertClToNcFiles">EnableConvertClToNcFiles</a> and
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<a class="xref" href="../../api/Hi.SessionCommands.PostExecutionCommand.html#Hi_SessionCommands_PostExecutionCommand_ClToNcFileTemplate">ClToNcFileTemplate</a>.</li>
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<li><strong>CL→MC hardening.</strong> Tool-offset resolution walked back to the distant <code>LOAD</code> block for every motion
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(O(N²) on production-scale files) and is now O(1) through a modal active-tool section; the
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documentary program-to-Pn stamp is stamped once per run rather than walked per motion; the
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program-zero query no longer deep-clones the whole equipment assembly per motion block; the
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warned-tool-id set is run-scoped, so the <code>ClToMc--NoToolOffset</code> warning is no longer suppressed on
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every run after the first; and <a class="xref" href="../../api/Hi.NcParsers.Dependencys.Generic.MachineAxisConfig.html">MachineAxisConfig</a> gains a
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public <code>Clear()</code> so a machine switch rebuilds the axis table instead of accumulating stale rotary
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axes.</li>
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</ul>
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