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樓主  發(fā)表于: 2008-11-22 16:25
單軸的一個(gè)抬升裝置,配合碼垛機使用的.使用的是安川的伺服控制器和伺服電機,通過(guò)永宏的PLC控制,前些天在測試的時(shí)候,都很正常,可是這兩天出現了一個(gè)很奇怪的現象:
   整個(gè)運行我們是分為每5次上升一定的高度即上升一層的高度,,通過(guò)PLC內部計數器實(shí)現計數控制.可是現在它到第4層第5包的時(shí)候它直接上升到第5層高度.或在第8層的第5包的時(shí)候上到第9層的高度.
  如果是同一層的話(huà)那么可能是參數設置錯,可是一層其他4包的位置都是對的..還有不是每次都是這樣,但頻率很高..且如果我在上面不加任何負重的話(huà)它不會(huì )發(fā)生這種情況,電機負載測試正常沒(méi)有超調現象.
  不知道是不是和PLC的掃描周期有關(guān)系?請高手幫忙解釋下,萬(wàn)分感謝!

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