SPAD346C3/RS621005-AA
SPAD346C3/RS621005-AA
SPAD346C3/RS621005-AA
數(shù)控主要原理：是利用數(shù)字化程序?qū)C(jī)械運(yùn)動(dòng)及加工過程進(jìn)行控制的一種方法。先將被加工零件的有關(guān)信息（幾何信息、工藝信息等）表示成數(shù)字控制裝置所能接受的指令信息，然后由數(shù)字控制裝置對(duì)指令信息和反饋信息進(jìn)行處理，計(jì)算出機(jī)床各坐標(biāo)運(yùn)動(dòng)的控制信息，后將控制信息轉(zhuǎn)換為機(jī)床各坐標(biāo)部件的實(shí)際運(yùn)動(dòng)，加工出符合設(shè)計(jì)要求的零件。
數(shù)控系統(tǒng)由三大部分組成：控制系統(tǒng)，伺服系統(tǒng)和位置測(cè)量系統(tǒng)。
1）控制系統(tǒng)按加工工件程序進(jìn)行插補(bǔ)運(yùn)算，發(fā)出控制指令到伺服驅(qū)動(dòng)系統(tǒng)；控制系統(tǒng)主要由總線、CPU、電源、存貯器、操作面板和顯示屏、位控單元、可編程序控制器邏輯控制單元以及數(shù)據(jù)輸入/輸出接口等組成。還包括一個(gè)通訊單元，它可完成CNC、PLC的內(nèi)部數(shù)據(jù)通訊和外部高次網(wǎng)絡(luò)的連接。
2）伺服驅(qū)動(dòng)系統(tǒng)將控制指令放大，由伺服電機(jī)驅(qū)動(dòng)機(jī)械按要求運(yùn)動(dòng)；伺服驅(qū)動(dòng)系統(tǒng)主要包括伺服驅(qū)動(dòng)裝置和電機(jī)。
3）測(cè)量系統(tǒng)檢測(cè)機(jī)械的運(yùn)動(dòng)位置或速度，并反饋到控制系統(tǒng)，來修正控制指令。位置測(cè)量系統(tǒng)主要是采用長(zhǎng)光柵或圓光柵的增量式位移編碼器。
這三部分有機(jī)結(jié)合，組成完整的閉環(huán)控制的數(shù)控系統(tǒng)。
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