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廖工 (女士)
ic693alg222c
控制系統(tǒng)首先必須完成排線角度的實(shí)時檢測。設(shè)計(jì)采用1000線增量式編碼器與plc程序的結(jié)合實(shí)現(xiàn)的數(shù)字角度傳感器進(jìn)行排線角度的實(shí)時檢測,傳感器的分辨率為0.09°,滿足最小線徑為0.8mm的焊絲在主軸上層繞一圈角度檢測的要求;通過接近開關(guān)的動作來實(shí)現(xiàn)直線單元正常區(qū)域和換向區(qū)域的跟蹤;通過plc的輸出脈沖控制伺服電機(jī)驅(qū)動直線單元的運(yùn)行[3]。 2.2直線單元工作原理 直線單元的行進(jìn)速度應(yīng)與主軸轉(zhuǎn)速相匹配。通過主軸上安 裝的速度傳感器,測算出主軸的旋轉(zhuǎn)角速度n(轉(zhuǎn)/秒)。工字輪上焊絲沿軸向的移動速度為v= n*φ ,其中φ為焊絲線徑,單位mm,v的單位為mm/s。為保持排線機(jī)構(gòu)與主軸上焊絲移動速度的同步,即保持固定的滯后角,直線單元的推進(jìn)速度應(yīng)等于v。為確保滯后角的精確同步,直線單元的行進(jìn)速度應(yīng)等于v加上角度回路輸出值(偏移量),v轉(zhuǎn)換成伺服電機(jī)的轉(zhuǎn)速(脈沖數(shù)/秒)為: 脈沖速率=m*n*φ/d(個/秒) (1) 其中, n為主軸的旋轉(zhuǎn)角速度(轉(zhuǎn)/秒), φ為焊絲線徑(毫米), m為伺服電機(jī)的碼盤的每圈線數(shù),d為滾軸絲杠的導(dǎo)程(毫米/轉(zhuǎn))。 根據(jù)式2-1伺服電機(jī)給定脈沖速率的計(jì)算公式,其取值范圍為0~25000 p/s,故mv的輸出飽和上限值應(yīng)設(shè)為2500 p/s。
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地區(qū):滄州
主營產(chǎn)品:機(jī)床維修,鑄件,工量具地區(qū):深圳
主營產(chǎn)品:幕墻拉索張力測試儀,鋼絞線張力測試儀,鋼絲繩張拉力檢測儀地區(qū):東莞
主營產(chǎn)品:環(huán)氧板,聚三氟氯乙烯棒,PEEK棒地區(qū):汕頭
主營產(chǎn)品:物流公司,貨運(yùn)站,國內(nèi)陸運(yùn)