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ssors. Interactions within microprocessors and shared resources are achieved via 173。microprocessors architecture216。one board architecture中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: Multi173。in173。in173。plug173。in173。 Tool length pensation, cutter radius pensation , and tool nose radius pensation. 216。CNC software controls all functions of the machine and its efficiency of operation, and manages all local programming at the machine tool and graphic simulation of the cutting process if available. 216。8)診斷: 檢查一切不正常的程序、操作和其他錯(cuò)誤狀態(tài)。 4)插補(bǔ): 插補(bǔ)的任務(wù)是通過插補(bǔ)計(jì)算程序在一條曲線的已知起點(diǎn)和終點(diǎn)之間進(jìn)行 “ 數(shù)據(jù)點(diǎn)的密化工作 ” 。并 進(jìn) 行 實(shí)時(shí) 位置反 饋 控制,使各個(gè)坐 標(biāo)軸 能精確地走到所要求的位置。從外部特征來看, CNC系統(tǒng)是由 硬件(通用硬件和專用硬件)和軟件(專用) 兩大部分組成的。vISO(國(guó)際標(biāo)準(zhǔn)化組織 )的定義 : “ 數(shù)控系統(tǒng)是一種控制系統(tǒng),它自動(dòng)閱讀輸入載體上事先給定的數(shù)字,并將其譯碼,從而使機(jī)床移動(dòng)和加工零件 ” ?!? NC Technology 》 E- mail: ?? Numerical Control Technology ??機(jī)電工程學(xué)院主講: 蔣廷彪 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: Ch4 COMPUTER NUMERICAL CONTROL UNIT 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: Outline system ARCHITECTURE OF CNC UNIT Software4. OPEN ARCHITECTURE SYSTEM FOR CNC UNIT中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: Introduction vMachine controls are divided into two types:v numerical control (NC) v puter numerical control (CNC). vNC controls have to read the program each time a part is run。 The most basic function of any NC machine is automatic, precise, and consistent motion control. 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: The makeup of a linear axis of an NC machine中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: CNC SystemvDefinition (EIA): CNC system is a special puter system that is equipped with certain interface circuits and servo drivers, and can do part or all the works an NC system do by running the software stored in its memories.v EIA(美國(guó)電子工業(yè)協(xié)會(huì) )所屬的數(shù)控標(biāo)準(zhǔn)化委員會(huì)的定義 : “ CNC是用一個(gè)存儲(chǔ)程序的計(jì)算機(jī),按照存儲(chǔ)在計(jì)算機(jī)內(nèi)的讀寫存儲(chǔ)器中的控制程序去執(zhí)行數(shù)控裝置的部分或全部功能,在計(jì)算機(jī)之外的唯一裝置是接口 ” 。216。 系 統(tǒng)初始化 系統(tǒng)控制軟件程序管理編輯 存儲(chǔ) 錄放 管理軟件 控制軟件輸入程序 輸出程序 顯示程序 診斷程序 譯碼程序 補(bǔ)償計(jì)算 速度控制 插補(bǔ)程序 位控程序CNC軟件的構(gòu)成 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部*《 NC Technology 》 E- mail: CNC裝置的裝置的 組組 成和工作原理成和工作原理3. 工作原理 通 過 各種 輸 入方式,接受機(jī)床加工零件的各種數(shù)據(jù)信息, 經(jīng)過 CNC裝置 譯碼 ,再 進(jìn) 行 計(jì) 算機(jī)的 處 理、運(yùn)算,然后將各個(gè)坐 標(biāo)軸 的分量送到各控制 軸 的 驅(qū)動(dòng)電 路, 經(jīng)過轉(zhuǎn)換 、放大去 驅(qū)動(dòng) 伺服 電動(dòng) 機(jī), 帶動(dòng) 各 軸 運(yùn) 動(dòng) 。3)數(shù)據(jù)處理 : 包括刀具 補(bǔ)償 ,速度 計(jì) 算以及 輔 助功能的 處 理等。7)顯示: 零件程序、參數(shù)、刀具位置、機(jī)床狀態(tài)等。The hardware : microprocessors, electronic memory modules, I/O interfaces, and position control modules, etc. 216。 Rapid motion function 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: The main functions and features of CNC unit 6. Miscellaneous function7. Compensation function 216。CNC unit is the core of CNC system. The hardware prising a CNC unit is made up of microprocessors, electronic memory modules, I/O interfaces, and position control modules, etc. , which is just like an ordinary puter system. 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: Types of CNC Unit vby the architecture of printed circuit boards1. All173。 microprocessorsv by the manufacturing fashions1. ordinary personal puter architecture2. special purpose architecturev according to their opening degree 1. Close architecture2. PC173。plug173。one board architecture vAll173。in173。processor on duty of controlling and occupying the system bus, while the others cannot occupy the system bus and cannot access main memory. ? This architecture is simple and can be implemented easily, whereas, for reason of centralized controlling, its performances and abilities are limited by the byte length, data width, address ability, and calculating speed of microprocessor. 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: Multi173。 bus based multi host microprocessor system. 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》 E- mail: Distributed system216。servant system A processor is called master microprocessor, others are servant microprocessors, and they are all independent systems. Only master microprocessor can control the bus, access the resources attached with the bus, control and monitor servant microprocessors, and coordinate the operations of servant microprocessors. 中國(guó)電子科技集團(tuán)公司科技與質(zhì)量部 *《 NC Technology 》