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<title>訓練與校正銑削係數 | HiAPI-C# 2025 </title>
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<article data-uid="Cmd-MillingTraining">
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<h1 id="訓練與校正銑削係數">訓練與校正銑削係數</h1>
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<p>銑削係數為計算銑削力的必須參數。</p>
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<p>訓練與校正銑削係數需先完成<a href="../Mapping/index.html">資料映射</a>。</p>
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<p><a class="xref" href="../../../../../api/Hi.MachiningProcs.RuntimeApi.html#Hi_MachiningProcs_RuntimeApi_TrainMillingPara_">TrainMillingPara</a><small>(API)</small>訓練銑削係數，不需先設定工件銑削係數，輸出的新係數也與原工件銑削係數無關。</p>
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<p><a class="xref" href="../../../../../api/Hi.MachiningProcs.RuntimeApi.html#Hi_MachiningProcs_RuntimeApi_ReTrainMillingPara_">ReTrainMillingPara</a><small>(API)</small>校正銑削係數，需基於已設定之工件銑削係數，才可輸出校正後係數。校正時原係數的權重10%、從資訊映射而得的樣本權重90%。</p>
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<div class="NOTE">
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<h5>Note</h5>
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<p><strong>指令格式</strong></p>
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<pre><code>//訓練銑削係數
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TrainMillingPara(<樣本旗標>, <檔案輸出路徑>);
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//校正銑削係數
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ReTrainMillingPara(<樣本旗標>, <檔案輸出路徑>);
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</code></pre>
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</div>
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<p><樣本旗標> 為應用於訓練資料的資料種類，包含：<code>Fx</code>、<code>Fy</code>、<code>Fz</code>、<code>Mx</code>、<code>My</code>、<code>Mz</code>。
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使用<code>|</code>號作聯集。</p>
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<div class="TIP">
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<h5>Tip</h5>
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<p><strong>以動力計資料為例，輸出訓練銑削係數</strong></p>
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<pre><code>ClearTimeMappingData();
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AddTimeDataByFile( "lineA", "Mapping/sensor1.csv", "18:25:51.7100", "18:26:12.9910");
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AddTimeDataByFile( "lineB", "Mapping/sensor1.csv", "18:26:30.5750", "18:27:12.2880");
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PlayNcFile("NC/file1.nc")
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TrainMillingPara(Fx|Fy|Fz, "StainlessSteel.mp");
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</code></pre>
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</div>
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<div class="TIP">
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<h5>Tip</h5>
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<p><strong>以智慧刀把資料為例，輸出校正銑削係數</strong></p>
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<pre><code>ClearTimeMappingData();
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AddTimeDataByFile( "lineA", "Mapping/sensor1.csv", "18:25:51.7100", "18:26:12.9910");
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AddTimeDataByFile( "lineB", "Mapping/sensor1.csv", "18:26:30.5750", "18:27:12.2880");
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PlayNcFile("NC/file1.nc")
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ReTrainMillingPara(Fz|Mx|My|Mz, "StainlessSteel.mp");
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</code></pre>
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</div>
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<h2 id="訓練條件">訓練條件</h2>
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<p>路徑樣本<u>以穩定資料訓練佳</u>，即資料波形有重複性維持至少兩轉。因系統演算法最低以一轉波形做訓練。
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在非穩定情況，會因為模擬中的每刃進給固定、訓練資料不穩定，造成剪切力於總力占比降低，使得訓練出的犁切係數偏高。</p>
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<p>樣本穩定的情況下，NC路徑沒有限制切削形狀，槽銑或側銑，任意形狀刀具皆可用來訓練及校正銑削係數。</p>
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<p>以<code>TrainMillingPara</code>訓練銑削係數，資訊映射須包含至少一組不同每刃進給的路徑樣本。訓練資料的資料種類建議最少為(動力計)<code>Fx|Fy|Fz</code>或(智慧刀把)<code>Fz|Mx|My|Mz</code>。
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如果資料種類少於前述，如<code>Fx|Fy</code>或<code>Mx|My|Mz</code>，則樣本的自由度太高，訓練出來的係數不能符合訓練樣本以外的路徑。</p>
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<p>如果僅使用<code>Mx|My|Mz</code>，由於力矩資料為 <span class="math">\(\vec{r} \times \vec{F}\)</span>，所以r方向資料會遺失，相當於少了一個自由度，難以訓練材料系數。
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所以力矩資料須搭配<code>Fz</code>使用。</p>
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<p>以<code>ReTrainMillingPara</code>校正銑削係數，沒有限制資料種類及每刃進給。</p>
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<h2 id="訓練品質指標">訓練品質指標</h2>
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<p>訓練完成後，系統會計算以下品質指標：</p>
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<h3 id="相關係數-correlation-coefficient-r">相關係數 (Correlation Coefficient, R)</h3>
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<p>相關係數 <span class="math">\(R\)</span> 是整體訓練結果的單一數值，用於評估訓練後模擬值與量測值的線性相關程度，範圍為 <span class="math">\(0\)</span> 到 <span class="math">\(1\)</span>，越接近 <span class="math">\(1\)</span> 表示訓練結果越好。新刀的相關係數通常介於 0.95 至 0.999 之間。</p>
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<h3 id="訓練誤差比-trainingerrratio">訓練誤差比 (TrainingErrRatio)</h3>
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<p>訓練誤差比是在執行 <a class="xref" href="../../../../../api/Hi.MachiningProcs.RuntimeApi.html#Hi_MachiningProcs_RuntimeApi_TrainMillingPara_">TrainMillingPara</a><small>(API)</small> 或 <a class="xref" href="../../../../../api/Hi.MachiningProcs.RuntimeApi.html#Hi_MachiningProcs_RuntimeApi_ReTrainMillingPara_">ReTrainMillingPara</a><small>(API)</small> 後，動態註冊並設置到訓練區域內各步的<a href="../StepVariables/index.html">步變數</a>，用於評估該步的模擬與量測之間的誤差程度，數值越小表示該步的訓練品質越好。</p>
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<div class="math">
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\[
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\text{TrainingErrRatio} = \sqrt{\frac{\sum_{i} e_i^2}{\sqrt{\sum_{i} y_i^2 \cdot \sum_{i} \hat{y}_i^2}}}
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\]</div>
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<p>其中：</p>
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<ul>
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<li><span class="math">\(e_i = y_i - \hat{y}_i\)</span>：第 <span class="math">\(i\)</span> 個樣本的誤差</li>
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<li><span class="math">\(y_i\)</span>：量測值</li>
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<li><span class="math">\(\hat{y}_i\)</span>：模擬預測值</li>
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</ul>
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<p>此指標會嵌入到每個加工步驟的輸出資料中，可用於識別訓練品質較差的段落。</p>
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<h3 id="角度偏移-angleoffset">角度偏移 (AngleOffset)</h3>
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<p>角度偏移是在執行訓練函數後，動態註冊並設置到訓練區域內各步的<a href="../StepVariables/index.html">步變數</a>。<span class="math">\(\theta_{offset}\)</span> 表示該步量測資料與模擬資料之間的刀刃旋轉相位差。系統會自動對齊相位以獲得最佳訓練結果。</p>
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<div class="math">
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\[
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\theta_{offset} = \frac{2\pi \cdot i_{min}}{N_{div}}
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\]</div>
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<p>其中：</p>
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<ul>
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<li><span class="math">\(i_{min}\)</span>：使預測誤差最小的角度索引</li>
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<li><span class="math">\(N_{div}\)</span>：一轉的角度分割數，即 <a class="xref" href="../../../../../api/Hi.MachiningProcs.RuntimeApi.html#Hi_MachiningProcs_RuntimeApi_MillingCycleDivisionNum">MillingCycleDivisionNum</a><small>(API)</small></li>
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</ul>
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<div class="TIP">
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<h5>Tip</h5>
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<p>如果同一批訓練中各段落的 AngleOffset 差異過大，可能表示主軸旋轉突然放慢或放快或資料缺失，或系統無法準確分析樣本並導致不理想訓練的結果。</p>
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</div>
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<div class="TIP">
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<h5>Tip</h5>
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<p>較大的 <a class="xref" href="../../../../../api/Hi.MachiningProcs.RuntimeApi.html#Hi_MachiningProcs_RuntimeApi_MillingCycleDivisionNum">MillingCycleDivisionNum</a><small>(API)</small> 設定可以得到更準確的 AngleOffset 結果，進而訓練出更準確的銑削係數。</p>
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</div>
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<h2 id="範例專案-動力計訓練銑削係數">範例專案-動力計訓練銑削係數</h2>
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<p>使用動力計訓練銑削係數的範例專案可於此下載：</p>
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<p><a href="https://superhightech-gitea.webredirect.org/HiNC-Deploy/Demo-Para-Training-S50C-202501">https://superhightech-gitea.webredirect.org/HiNC-Deploy/Demo-Para-Training-S50C-202501</a></p>
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<p>此專案使用 Kistler 動力計量測資料，透過<a href="../Mapping/index.html#%E6%8C%87%E5%AE%9A%E6%95%B8%E6%8E%A7%E8%B7%AF%E5%BE%91%E5%8F%8A%E6%99%82%E9%96%93%E5%B1%80%E9%83%A8%E6%98%A0%E5%B0%84">一對多映射-指定數控路徑及時間局部映射</a>方式，訓練 S50C 材料的銑削係數。</p>
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<p><img src="demo-training-S50C.png" alt="demo-training-S50C.png"></p>
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<div class="TIP">
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<h5>Tip</h5>
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<p>加工路徑與切削條件可以根據現場情況自由更改。</p>
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