運(yùn)動控制器的功能
1、運(yùn)動規(guī)劃功能
實(shí)際上是形成運(yùn)動的速度和位置的基準(zhǔn)量。合適的基準(zhǔn)量不但可以改善軌跡的精度,而且其影響作用還可以降低對轉(zhuǎn)動系統(tǒng)以及機(jī)械傳遞元件的要求。通用運(yùn)動控制器通常都提供基于對沖擊、加速度和速度等這些可影響動態(tài)軌跡精度的量值加以限制的運(yùn)動規(guī)劃方法,用戶可以直接調(diào)用相應(yīng)的函數(shù)。
對于加速度進(jìn)行限制的運(yùn)動規(guī)劃產(chǎn)生梯形速度曲線;對于沖擊進(jìn)行限制的運(yùn)動規(guī)劃產(chǎn)生S形速度曲線。一般來說,對于數(shù)控機(jī)床而言,采用加速度和速度基準(zhǔn)量限制的運(yùn)動規(guī)劃方法,就已獲得一種優(yōu)良的動態(tài)特性。對于高加速度、小行程運(yùn)動的快速定位系統(tǒng),其定位時(shí)間和超調(diào)量都有嚴(yán)格的要求,往往需要高階導(dǎo)數(shù)連續(xù)的運(yùn)動規(guī)劃方法。
2、多軸插補(bǔ)、連續(xù)插補(bǔ)功能
通用運(yùn)動控制器提供的多軸插補(bǔ)功能在數(shù)控機(jī)械行業(yè)獲得廣泛的應(yīng)用。近年來,由于雕刻市場,特別是模具雕刻機(jī)市場的快速發(fā)展,推動了運(yùn)動控制器的連續(xù)插補(bǔ)功能的發(fā)展。在模具雕刻中存在大量的短小線段加工,要求段間加工速度波動盡可能小,速度變化的拐點(diǎn)要平滑過渡,這樣要求運(yùn)動控制器有速度前瞻和連續(xù)插補(bǔ)的功能。固高科技公司推出的專門用于小線段加工工藝的連續(xù)插補(bǔ)型運(yùn)動控制器,該控制器在模具雕刻、激光雕刻、平面切割等域獲得了良好的應(yīng)用。
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