在电火花线切割加工中，钢丝过松是个大问题。今看了“《电加工》1997年第2期38页”造成线切割加工中短路、断丝的几种原因“第一条后，联想到我们在工作中，从未发生过钢丝过松的现象。究其原因，是我们用废旧导轮做的”紧丝器“（见附图）起到了良好的作用。多年的实践证明，它体? In wire EDM, the wire is too loose is a big problem. Now read ”“ Electric processing ”1997 the second period 38 pages “ cause the wire cutting process of short circuit, several reasons for broken wire ”after the first one, think of us in the work, never had steel wire Too loose phenomenon. The reason is that we do with the old pulley “Tensioner” (see photo) has played a good role. Years of practice has proved that it?