機械外文翻譯---數(shù)控機床開環(huán)控制系統(tǒng)-數(shù)控設計(更新版)
【正文】 racteristic the parameter, the system direct production characteristic example model: We must save the related characteristic class in the database the structure information, the database table collection are use in saving this part of related information. According to the characteristic type definition need, we defined the characteristic class code table, the characteristic class edition information have outstanding shown the characteristic type。 But needs to carry on 6 to 9 adds the pulse to pensate in the chart the shadow partially for to pensate the area. Compensates the range of points these to bee the error The calibration corrections stores the puter, when work table by zero displacement in position, installs sends out the absolute zero point localization signal in the absolute zero point micros witch, later puter as necessary will send out the goal to pensate to pensate the signal, will carry on the position error to the engine bed to pensate. The cosine generator assigns slide guage initiation signal a electricity and by step of transmission. 3. feedbacks pensates the openloop control Chart 2 has produced this kind of system schematic diagram. This system surveys two parts by the openloop control and the induction synchromesh direct position to be posed. Here position examination does not serve as the position the feedback, but is pensates the feedback as the position error. Its cardinal principle is: Installs the instruction pulse by the engine bed numerical control which CNC sends out, on the one hand the supplies open system, the control stepbysteps the electrical machinery according to the instruction revolution, and the direct drive platen moves, constitutes the openloop control。作為傳統(tǒng)元件的齒輪、絲杠盡管制造精度很高，但總免不了存在間隙。在特征層，利用特征 ID、幾何要素 ID、尺寸 ID、公差 ID、粗糙度 ID 等主鍵進行數(shù)據(jù)檢索。把這些補償點列成誤差 .修正表存入計算機，當工作臺由零點位置移動時，安裝在絕對原 點處的微動開關發(fā)出絕對原點定位信號，以后計算機將隨時發(fā)出目標補償點的補償信號，對機床進行定位誤差補償。,M)／ CAPP／ CAM 集成系統(tǒng) [J]．計算機輔助設計與制造， 1998， 28(5)： 51 55． [3]. 曾慧娥，周慶忠．基于特征的機械產(chǎn)品造型研究 [J]．機械設計與制造 [程，1999， 28(2)： 1 2～ l4．
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