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AO202/SI
AO202/SI 價格:800  元(人民幣) 產地:德國
最少起訂量:1 發貨地:福建廈門
上架時間:2018-09-07 16:29:25 瀏覽量:515
廈門光沃自動化設備有限公司  
經營模式:經銷商 公司類型:其他有限責任公司
所屬行業:PLC控制系統 主要客戶:全國市場
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AO202/SI

AO202/SI

AO202/SI

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測量方法是從7個任意位置分別進行一次原點復歸,測定其停止位置,以讀出的最大差值作為原點復歸精度。

  應當指出,現有定位精度的檢測是在快速、定位的情況下測量的,對某些進給系統風度不太好的數控機床,采用不同進給速度定位時,會得到不同的定位精度值。另外,定位精度的測定結果與環境溫度和該坐標軸的工作狀態有關,目前大部分數控機床采用半閉環系統,位置檢測元件大多安裝在驅動電動機上,在1m行程內產生0.01~0.02mm的誤差是不奇怪的。這是熱伸長產生的誤差,有些機床便采用預拉伸(預緊)的方法來減少影響。

  每個坐標軸的重復定位精度是反映該軸的最基本精度指標,它反映了該軸運動精度的穩定性,不能設想精度差的機床能穩定地用于生產。目前,由于數控系統功能越來越多,對每個坐噴射器標運動精度的系統誤差如螺距積累誤差、反向間隙誤差等都可以進行系統補償,只有隨機誤差沒法補償,而重復定位精度正是反映了進給驅動機構的綜合隨機誤差,它無法用數控系統補償來修正,當發現它超差時,只有對進給傳動鏈進行精調修正。因此,如果允許對機床進行選擇,則應選擇重復定位精度高的機床為好。

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