本文介绍了用PC改造四米龙门刨床工作台的自动循环，点动前进和点动后退，自动进刀和退刀等功能的交流控制系统。
The AC control system of the 4m planer is retrofitted with PC for table automatic cycle, jogging forward and jogging backward, automatic feed and withdraw.
采用开关磁阻电机对旧设备——龙门刨床进行改造，保留原刨床参数，在刨床的基础上增加了铣削功能，既节约了资金，又提高了工作效率。
Transformation of old equipment-closed planer by using switch reluctance machine increases milling function, it can not only saves fund but also increase work efficiency.
介绍了龙门刨床主传动系统行程开关的不足及改进方案、工作原理、效果等。
The paper introduces the improved methods on the main transmission system switch of gantry planer.
通过对刨床改造方案的制定，对B2016A龙门刨床进行技术改造，成为龙门刨铣床，既可提高工作效率5 ~6倍，每年又可节约生产费用6万元。
The B2016A portable planer is technically reformed into a portable milling machine, which enhances productivity 5 to 6 times and saves production cost sixty thousand yuan each year.
通过对刨床改造方案的制定，对B2016A龙门刨床进行技术改造，成为龙门刨铣床，既可提高工作效率5 ~6倍，每年又可节约生产费用6万元。
The B2016A portable planer is technically reformed into a portable milling machine, which enhances productivity 5 to 6 times and saves production cost sixty thousand yuan each year.
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