新聞:滄縣繞線機(jī)專(zhuān)用步進(jìn)電機(jī)86BYGH1143型錄
一、數(shù)控機(jī)床對(duì)主軸電機(jī)和伺服電機(jī)的要求不同：
數(shù)控機(jī)床對(duì)進(jìn)給伺服電機(jī)的要求主要為:
(1)機(jī)械特性:要求伺服電機(jī)的速降小、剛度大
(2)快速響應(yīng)的要求:這在輪廓加工，特別對(duì)曲率大的加工對(duì)象進(jìn)行高速加工時(shí)要求較嚴(yán)格
(3)調(diào)速范圍:這可以使數(shù)控機(jī)床適用于各種不同的刀具、加工材質(zhì)適應(yīng)于各種不同的加工工藝
(4)一定的輸出轉(zhuǎn)矩，并要求一定的過(guò)載轉(zhuǎn)矩。機(jī)床進(jìn)給機(jī)械負(fù)載的性質(zhì)主要是克服工作臺(tái)的摩擦力和切削的阻力，因此主要是"恒轉(zhuǎn)矩"的性質(zhì)。
對(duì)主軸電機(jī)的要求主要為:
(1)足夠的輸出功率，數(shù)控機(jī)床的主軸負(fù)載性質(zhì)近似于"恒功率"，也就是當(dāng)機(jī)床的主軸轉(zhuǎn)速高時(shí)，輸出轉(zhuǎn)矩較小主軸轉(zhuǎn)速低時(shí)，輸出轉(zhuǎn)矩大即要求主軸驅(qū)動(dòng)裝置要具有"恒功率"的性質(zhì)
新聞:滄縣繞線機(jī)專(zhuān)用步進(jìn)電機(jī)86BYGH1143型錄
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一些廠家生產(chǎn)的所謂硅藻泥，根本就沒(méi)有硅藻土成分。硅藻泥行業(yè)標(biāo)準(zhǔn)指出，硅藻成分應(yīng)該可檢出。如何挑選真正的硅藻泥如何才能挑選到真正的好的硅藻泥?業(yè)內(nèi)人士表示，消費(fèi)者可以一看二噴三聞。首先，看資質(zhì)。硅藻泥廠商要有建材主管部門(mén)頒發(fā)的證書(shū)或權(quán)威部門(mén)出具的檢測(cè)報(bào)告，也就是說(shuō)，硅藻泥要擁有合法的身份。這一方面是確保企業(yè)擁有硅藻泥生產(chǎn)的相關(guān)技術(shù)和生產(chǎn)資格，另一方面，也為消費(fèi)者的權(quán)益提供了保障。其二，噴水實(shí)驗(yàn)。
運(yùn)動(dòng)控制器控制伺服電機(jī)通常采用兩種指令方式：
1、數(shù)字脈沖
這種方式與步進(jìn)電機(jī)的控制方式類(lèi)似，運(yùn)動(dòng)控制器給伺服驅(qū)動(dòng)器發(fā)送“脈沖/方向”類(lèi)型的脈沖指令信號(hào)；伺服驅(qū)動(dòng)器工作在位置控制模式，位置閉環(huán)由伺服驅(qū)動(dòng)器完成。日系伺服和國(guó)產(chǎn)伺服產(chǎn)品大都采用這種模式。其優(yōu)點(diǎn)是系統(tǒng)調(diào)試簡(jiǎn)單，不易產(chǎn)生干擾，但缺點(diǎn)是伺服系統(tǒng)響應(yīng)稍慢。
2、模擬信號(hào)
這種方式下，運(yùn)動(dòng)控制系統(tǒng)給伺服驅(qū)動(dòng)器發(fā)送+/-10V的模擬電壓指令，同時(shí)接收來(lái)自電機(jī)編碼器或直線光柵等位置檢測(cè)元件的位置反饋信號(hào)；伺服驅(qū)動(dòng)器工作在速度控制模式，位置閉環(huán)由運(yùn)動(dòng)控制器完成。歐伺服產(chǎn)品大多采用這種工作模式。其優(yōu)點(diǎn)是伺服響應(yīng)快，但缺點(diǎn)是對(duì)現(xiàn)場(chǎng)干擾較敏感，調(diào)試稍復(fù)雜。
新聞:滄縣繞線機(jī)專(zhuān)用步進(jìn)電機(jī)86BYGH1143型錄
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下料是異型石材加工的步，首先選擇質(zhì)地優(yōu)良、尺寸合適的荒料進(jìn)行下料。下料基本上采用圓盤(pán)式金剛石鋸、金剛石串珠繩鋸機(jī)。下料形狀有板料和塊料，板料有平板和圓弧板。使用的工具主要是大直徑的金剛石圓鋸片和金剛石串珠繩。成形即指異型石材的輪廓加工。異型石材的輪廓多種多樣，有花線、圓弧板、柱座、柱頭、平面雕刻、立體雕刻等。使用設(shè)備也是多種多樣，有的數(shù)控設(shè)備、液壓仿形設(shè)備、光電仿形設(shè)備、立式車(chē)床、臥式車(chē)床、手拉磨床、鉆床等。
新聞:滄縣繞線機(jī)專(zhuān)用步進(jìn)電機(jī)86BYGH1143型錄
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