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陜西欣鴻然自動化設(shè)備有限公司
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行程開關(guān)就是一般所說的限位開關(guān)?？梢岳斫鉃槭且唤M接通或斷開的簡單電路。
“用來檢測物體是否移動到限定的位置”，例如，機(jī)床的移動工作臺上裝撞塊，相對不動的床身上裝行程開關(guān)，當(dāng)機(jī)床工作臺移動預(yù)先設(shè)定的距離后，工作臺上的撞塊壓動床身上安裝的行程開關(guān)，行程開關(guān)斷開或接通，就有電信號反應(yīng)到控制柜中，工作臺停止移動或反向移動。
“原理是當(dāng)物體碰觸到限位開關(guān)，開關(guān)的常開點(diǎn)閉合，常閉點(diǎn)斷開，用來控制電路或接受信號”
常開與常閉是開關(guān)的兩種原始狀態(tài)，常開型一般指沒有壓下的狀態(tài)電路是開通的，常閉型一般指沒有壓下的狀態(tài)電路是斷開的。根據(jù)需要來進(jìn)行選擇，開關(guān)的常開點(diǎn)斷開或常閉點(diǎn)閉合。
如撞塊壓下行程開關(guān)常開點(diǎn)斷開（斷開電路）或常閉點(diǎn)閉合（接通電路）
常開接點(diǎn)：在不受外力（包括電力）的作用下，開關(guān)斷開的，就是常開接點(diǎn)。
物體碰觸到限位開關(guān)，開關(guān)的常開點(diǎn)閉合，常閉點(diǎn)斷開，用來控制電路或接受信號。物體可以是任何機(jī)械裝置。行程開關(guān)與繼電器是不同的“開關(guān)”繼電器是有電磁線圈的，行程開關(guān)是沒有的，內(nèi)部只有開關(guān)接點(diǎn)，需要外力的作用才使開關(guān)轉(zhuǎn)換狀態(tài)。
限位開關(guān)的應(yīng)用方面很多，很多電器里面都有它的身影。那這么簡單的開關(guān)能起什么作用呢？它主要是起連鎖保護(hù)的作用。最常見的例子莫過于其在洗衣機(jī)和錄音機(jī)（錄像機(jī)）中的應(yīng)用了。
Limit switch is mainly used for the mechanical displacement into an electrical signal, the motor running state can be changed, so as to control mechanical b or to be used in process control.
Position switch real handy limit is in industry, where it and other equipment, composed of more complex automation equipment.
Machine tools have many such limit switch, it is used to control the movement of the workpiece or automatic feed stroke, to avoid collision. Sometimes use the limit switch makes the controlled bs between the provisions of the two b automatic reversing, so as to obtain the continuous reciprocating motion. Such as auto transport material car reaches the finishing touch limit switch, to connect to the dumper body, put an overturned car material, and return to the starting point. Arrive at the starting point after the starting point of the touch switch, the circuit charging mechanism, start automatic loading. Always go on like this, it becomes a set of automatic production line, need not tube, working day and night, save the manual labor.
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