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<title>Class PositioningOverride | HiAPI-C# 2025 </title>
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<meta name="description" content="Per-word positioning override — a non-modal block-root section keyed by word name (axis words and the I/J/K interpolation parameters) whose values are / / / / , plus the coded-position (indexing axis) family / / / / . Overrides the modal G90/G91 state (and, for I/J/K, the default incremental center reading) for the listed words on this block only. Written by when a word carries one of the Siemens per-word coordinate function wrappers AC() / IC() / DC() / ACP() / ACN() or their coded-position counterparts CAC() / CIC() / CDC() / CACP() / CACN(), and by the Heidenhain L / C / CC / CYCL CALL POS parsers (through ) for the klartext I-prefixed incremental words IX+20 / IC+90 — always there, keyed by the plain axis letter. Not written for the CYCL DEF 7 datum-shift words: those are increments of the active shift, not of the tool position, and stay inside the cycle's own record. Consumed by (linear axes) and (rotary axes) — both treat every non-Incremental value as an absolute write, both follow the modal state for a word that has no entry, and both resolve a coded entry's indexing position number through and rewrite the entry to its plain counterpart in place — by (the directional window for / and the non-modular-axis boundary warning; it never sees a coded value, and it does not read an entry — the literal pass-through follows the record the rotary writer leaves), and by (absolute I/J/K center components) — and, ahead of the shared resolve, by two consumers that take the raw word before it can see it: (CYCL CALL POS words and the M99/M89 root words, resolved against the last programmed position on the spot) and (a distance in the machine frame); words without an entry keep the default behavior unchanged. The section is not listed in any ModalCarry key set — it never carries to later blocks. It describes the programmed spelling; what the write stage actually converted, with the programmed delta, is the record.">
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<article data-uid="Hi.NcParsers.Keywords.PositioningOverride">
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<h1 id="Hi_NcParsers_Keywords_PositioningOverride" data-uid="Hi.NcParsers.Keywords.PositioningOverride" class="text-break">
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Class PositioningOverride
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</h1>
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<div class="facts text-secondary">
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<dl><dt>Namespace</dt><dd><a class="xref" href="Hi.html">Hi</a>.<a class="xref" href="Hi.NcParsers.html">NcParsers</a>.<a class="xref" href="Hi.NcParsers.Keywords.html">Keywords</a></dd></dl>
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<dl><dt>Assembly</dt><dd>HiMech.dll</dd></dl>
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</div>
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<div class="markdown summary"><p>Per-word positioning override — a non-modal block-root section keyed
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by word name (axis words and the I/J/K interpolation parameters)
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whose values are <a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_Absolute">Absolute</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_Incremental">Incremental</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_Shortest">Shortest</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_PositiveOnly">PositiveOnly</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_NegativeOnly">NegativeOnly</a>, plus the coded-position
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(indexing axis) family <a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_CodedAbsolute">CodedAbsolute</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_CodedIncremental">CodedIncremental</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_CodedShortest">CodedShortest</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_CodedPositiveOnly">CodedPositiveOnly</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_CodedNegativeOnly">CodedNegativeOnly</a>.
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Overrides the modal G90/G91 <a class="xref" href="Hi.NcParsers.Keywords.Positioning.html">Positioning</a> state (and, for
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I/J/K, the default incremental center reading) for the listed words
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on this block only.</p>
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<p>
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Written by
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<a class="xref" href="Hi.NcParsers.EvaluationSyntaxs.Siemens.SiemensAcIcSyntax.html">SiemensAcIcSyntax</a> when a
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word carries one of the Siemens per-word coordinate function
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wrappers <code>AC()</code> / <code>IC()</code> / <code>DC()</code> / <code>ACP()</code> /
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<code>ACN()</code> or their coded-position counterparts <code>CAC()</code> /
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<code>CIC()</code> / <code>CDC()</code> / <code>CACP()</code> / <code>CACN()</code>, and by
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the Heidenhain L / C / CC / CYCL CALL POS parsers (through
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<a class="xref" href="Hi.NcParsers.ParsingSyntaxs.Heidenhain.HeidenhainIncrementalAxisWordUtil.html">HeidenhainIncrementalAxisWordUtil</a>)
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for the klartext I-prefixed incremental words <code>IX+20</code> /
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<code>IC+90</code> — always <a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_Incremental">Incremental</a> there,
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keyed by the plain axis letter. Not written for the <code>CYCL DEF 7</code>
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datum-shift words: those are increments of the active shift, not of
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the tool position, and stay inside the cycle's own record.
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Consumed by
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<a class="xref" href="Hi.NcParsers.LogicSyntaxs.IncrementalResolveSyntax.html">IncrementalResolveSyntax</a> (linear axes) and
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<a class="xref" href="Hi.NcParsers.LogicSyntaxs.McAbcSyntax.html">McAbcSyntax</a> (rotary axes) — both treat
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every non-Incremental value as an absolute write, both follow the
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modal <a class="xref" href="Hi.NcParsers.Keywords.Positioning.html">Positioning</a> state for a word that has no entry,
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and both resolve a
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coded entry's indexing position number through
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<a class="xref" href="Hi.NcParsers.LogicSyntaxs.CodedPositionUtil.html">CodedPositionUtil</a> and rewrite the entry to
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its plain counterpart in place — by
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<a class="xref" href="Hi.NcParsers.LogicSyntaxs.McAbcCyclicPathSyntax.html">McAbcCyclicPathSyntax</a> (the directional
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window for <a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_PositiveOnly">PositiveOnly</a> /
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<a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_NegativeOnly">NegativeOnly</a> and the non-modular-axis
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boundary warning; it never sees a coded value, and it does not read
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an <a class="xref" href="Hi.NcParsers.Keywords.Positioning.html#Hi_NcParsers_Keywords_Positioning_Incremental">Incremental</a> entry — the literal
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pass-through follows the <a class="xref" href="Hi.NcParsers.Keywords.IncrementalWords.html">IncrementalWords</a> record the
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rotary writer leaves), and by
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<a class="xref" href="Hi.NcParsers.LogicSyntaxs.Siemens.SiemensCircularMotionSyntax.html">SiemensCircularMotionSyntax</a>
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(absolute I/J/K center components) — and, ahead of the shared
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resolve, by two consumers that take the raw word before it can see
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it: <a class="xref" href="Hi.NcParsers.LogicSyntaxs.Heidenhain.HeidenhainCannedCycleSyntax.html">HeidenhainCannedCycleSyntax</a>
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(CYCL CALL POS words and the M99/M89 root words, resolved against
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the last programmed position on the spot) and
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<a class="xref" href="Hi.NcParsers.LogicSyntaxs.MachineCoordSelectSyntax.html">MachineCoordSelectSyntax</a> (a distance in
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the machine frame); words without an entry keep the default behavior
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unchanged. The section is not listed in any ModalCarry key set — it
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never carries to later blocks. It describes the <i>programmed</i>
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spelling; what the write stage actually converted, with the
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programmed delta, is the <a class="xref" href="Hi.NcParsers.Keywords.IncrementalWords.html">IncrementalWords</a> record.
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</p>
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</div>
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<div class="markdown conceptual"></div>
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<div class="codewrapper">
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<pre><code class="lang-csharp hljs">public static class PositioningOverride</code></pre>
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</div>
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<dl class="typelist inheritance">
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<dt>Inheritance</dt>
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<dd>
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<div><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object">object</a></div>
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<div><span class="xref">PositioningOverride</span></div>
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</dd>
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</dl>
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<dl class="typelist inheritedMembers">
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<dt>Inherited Members</dt>
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<dd>
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<div>
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<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object)">object.Equals(object)</a>
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</div>
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<div>
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<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)">object.Equals(object, object)</a>
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</div>
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<div>
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<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.gethashcode">object.GetHashCode()</a>
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</div>
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<div>
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<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.gettype">object.GetType()</a>
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</div>
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<div>
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<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone">object.MemberwiseClone()</a>
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</div>
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<div>
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<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.referenceequals">object.ReferenceEquals(object, object)</a>
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</div>
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<div>
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<a class="xref" href="https://learn.microsoft.com/dotnet/api/system.object.tostring">object.ToString()</a>
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</div>
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</dd></dl>
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<h2 id="Hi_NcParsers_Keywords_PositioningOverride_examples">Examples</h2>
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<pre><code class="lang-csharp">"PositioningOverride": { "C": "Shortest" }</code></pre>
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</article>
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