electrode wire cut-in process, please relatively increase the distance of “Pulse Space”. And re-adjust the “Pulse Space” when it has stable conditions after Cut-in so that the “Machining Current” can meet the demands. 开高频选择电参数，用户可根据对切割频率或表面粗糙度等要求来选择（详见本说明书的脉冲电源分册），电极丝切入时请把脉冲间隔相对拉开，待切入后稳定时再调节脉冲间隔，使加工电流满足要求。
Rotate “Wave-Form Switch” in “Control Cabinet” to “Automatic Machining Step”, start “Program Running”, i.e. start “X, Y Feeding Switch”, (U, V Feeding Switch should also be started for Taper Machining). When it enters into Cutting, regulate “Potentiometer Rotary Button”, observe “Machine Tool Amperometer” to stabilize the Pointer. (It allows only a little sway of Pointer). 将控制柜上的波段开关旋到自动加工档，启动程序运行，即开启X、Y的进给开关，（若有锥度加工还应开启U、V进给开关），进入切割时，要调节电位计旋钮，观察机床电流表使指针稳定（允许指针略有晃动）。
After the Machining Completion, firstly shut off “Pulse Mains”, then switch off “Water Pump Power Supply” and “Kinetic Wire Tube Switch”. (Please be noted that “Wire Tube” should be shut off immediately after commutating. It is forbidden to close it after long time of commutating.) To check whether “X, Y Coordinate” have reached the “End Point” or not. If they have not reached “End Point”, it should examine if there is something wrong with Program or “Control Cabinet”.
加工结束应先关闭脉冲电源，然后关闭水泵电源，再关闭运丝筒开关（注意应在丝筒换向后迅速关闭，不要在换向后太久关闭），检查X、Y座标是否到终点，若未到终点就应检查程序是否有错或控制柜是否有故障。
Points for Attention: 注意事项
Reasonably regulate the “Feeding Speed” according to “Work-Piece Thickness, Material Hardness” until it stabilizes Amperometer. If it is not sure, it can have the trial cutting first and then implement the formal cutting after well-adjustment.
根据工作厚度，材料硬度要合理调好进给速度，使电流表稳定为止，如没有把握，可先行试割，待调好后再正式切割。
If it is not sure about the “Program Formulating” to “Complex Spares”, it can firstly implement the trial-cutting to thin sheet.
对于复杂零件的程序编制如无把握，可先用薄板试割。
If there is short-circuit circumstances in cutting such as none spark, none feeding cut etc., it can be removed by “Short-Circuit Backspace”. In addition, please don’t interrupt the operation to the best of the operator’s abilities, otherwise it will have “Machining Trace”. 切割中出现短路现象，（无火花、无进给切割）可用短路回退排除，另外在切割中应尽量不要操作停机，以免出现加工痕迹。
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It should have smoothly-circulated “Quench Liquid”, otherwise it easily causes “Broken Wire” or “Short-Circuit”. Please pay special attention to the point that it does not allow “Quench Liquid” to enter into “Machine Tool Running System”, otherwise it will be burnt. 冷却液一定要畅通，否则极易引起断丝或短路，工作中要特别注意冷却液不许进入机床电器，以免烧坏机床电器。
When “Concave Trace” occurs to “Conductive Block” or “Wire-Positioning Rod”, it should timely be regulated to new position, otherwise it will result in bad contact or broken “Electrode Wire”. 当导电块或挡丝棒表面出现凹痕时，应及时调整到新的位置，否则会发生接触不良或夹断电极丝。
Machine Tool Maintenance & Trouble Removal 机床的维护与故障的排除
Machine Tool Maintenance 机床的维护
It should keep clean of the overall “Machine Tool”. It should also wipe clean the Machine with more than eight hours’ stop. It should be coated with oil to prevent it from rusting. 整机应保持清洁，停机8小时以上应揩抹干净，并涂油防锈。
It should frequently use kerosene to clean the “Guide Wheel”, “Wire-Positioning Wheel” in “Coil Holder” and the surrounding parts. Dirt oil after cleaning can not be leaked into “Back Water Groove” of “Work-Table”.
线架中的导轮及排丝轮周围应常用煤油清洗干净，清洗后的脏油不得漏至工作台的回水槽内。
Complete set of Bearing and “Guide Wheel” should commonly be renewed after two to three months’ of use. (It can still use “Outer Cover of Copper Parts.) 导轮及轴承一般在使用2～3个月后应成套更换。（外套铜件仍可用）
When “Power Supply Voltage” exceeds ±10% of Rated Voltage, it suggests externally connecting with “Voltage Stabilizing Mains” outside “Control Cabinet”. 当供电电压超过额定电压±10%时建议控制柜外接稳压电源。
Under conditions of strictly in accordance with “Two-Shift Work System” and “Use Rules & Regulations”, the “Machine Tool Accuracy” can be kept in about two years. 本机床在两班制及按照使用规则的条件下，其精度保持在二年左右。
Common Trouble & Removal Methods of Machine Tool (See Table 3) 机床的常见故障与排除。（见表三）
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Table 3 表三 No. Problems in No. Machining 序加工中的问题 号 1 Broken It has Wire 断 丝 broken wire when it starts Unstable Feeding, too quick It should be fewer Current “Cut-in Speed” or overlarge and slightly slow in initial Current “Cut-in Speed” 进给不稳，切入速度太快或电流刚切入时速度应稍慢，电流要小些。 Search the Location of “Cooling System” Trouble and promptly remove troubles 查找冷却系统故障所在，及时排除。 Causes Causes 产生原因 Removal Methods Removal Methods 排除方法 wire-cutting.过大。 刚开始切割 即断丝 “Quench Liquid” does not eject in time. 冷却液没有及时喷出。 Some “Electrode Wire” has been coiled tightly in “Wire Tube” but some has been loosened which causes partially fierce It should immediately tighten wire-vibrating and even results in “Electrode Wire” and wire-breaking. 电极丝在筒上缠绕紧松不一造成局部抖丝厉害以致断裂。 Ineffective “Wire-Positioning Rod” results in Overlapping of “Electrode Wire”. 挡丝棒没有发挥作用，造成电极丝叠丝。 “Work-Piece Surface” has burr, overcome “Wire-Vibrating Conditions”. 应马上收紧电极丝，克服抖丝现象。 Adjust “Wire-Positioning Rod” Location 调整挡丝棒位置。 Get rid of Work-Piece Surface Burr and Oxidized oxidized skin and sharp edge. Skin 工件表面有毛刺，氧化皮及锐边 清除工作表面毛刺及氧化皮。 28
It suddenly “Wire-Breaking in Wire-Tube Timely remove trouble of breaks the Commutating” is mainly caused non-disconnection of HF wires during by not synchronously cut off “HF Mains the cutting Power Supply”. It results in the 及时排除高频电源不切断的故障。 process. burnt “Electrode Wire”. 在切割过程丝筒换向时断丝主要是高频电 中突然断丝 源没有同步切断，致使烧断电极It should have even 丝。 “Work-Piece Material” and It causes deformation by uneven “Work-Piece Material Tissue”. It breaks “Electrode Wire” in remove Stress inside “Work-Piece” to the greatest extent. 工件材质要力求均匀，尽量消除工件内应力。 clamping. 工件材料组织不均匀产生变形， 夹断电极丝。 Correctly choose “Electric Improper match between “Work-Piece Thickness” and “Electric Gauge Selection”. 工件厚度与电规准选择配合不当。 Improper Use of “Quench Gauge” 正确选择电规准。 Reasonably formulate Concentration and frequently keep clean of “Working Solution” 合理配制浓度，经常保持工作液清洁。 Liquid”, it is too diluted, or dirty or of too small flow. 冷却液使用不当，太稀或太脏或Renew “Electrode Wire” 流量太小。 更换电极丝。 “Electrode Wire” has been used for too long. It gets aged or crispy. 电极丝使用时间过长、老化、发脆。 2 There is obvious wire Loosened or vibrating “Electrode Remove according to “Wire-Loosening Method” 按松丝方法排除。 Remove sway and put “Electrode Wire” in center position of “Guide Wheel Groove” 消除窜动，使电极丝在导轮槽中间位置。 29
trace in the surface of Wire” 电极丝松动或抖动。 work-piece. 工件表面有明显丝痕 Large sway of “Guide Wheel” or no “Center Alignment” between “Upper and Lower Parts” 导轮窜动大或上下不对中。 No elimination of axial clearance between “Work-Table” and
“Wire-Tube Tool Carriage” 工作台及丝筒拖板轴向间隙未消除。 Unstable tracking 跟踪不稳定。 Too dirty or improper selection of “Quench Liquid” 冷却液选择不当或太脏。 3 “Guide Wheel” skips with whistle, or not flexible rotation 导轮跳动有啸叫声或转动不灵活 Large Guide Wheel Axial Clearance 导轮轴向间隙大。 “Quench Liquid” enters into Bearing 冷却液进入轴承。 It decreases “Bearing Accuracy” and wears away “Guide Wheel” in long-term use. 长期使用轴承精度降低、导轮磨损。 4 It does not conform with “Machining Accuracy”. 加工精度不符 Radial Skip of “Coil Holder Guide Wheel” and Axial Sway Out-of-Tolerance 线架导轮径向跳动与轴向窜动超差。 Large Back-Lash of Drive Gear 传动齿轮啮合间隙大。 Bad Verticality between Upper and Lower Work-Tables 上下工作台垂直度不好。 It results in out-of-step from over-small “Step-Motor Static Moment”. 步进电机静态力矩过小造成失步。 Adjust clearance between Nut and “Lead-Screw” 调整丝杠与丝母间隙。 Electric Gauge Adjustment & HF Tracking 调节电规准及高频跟踪。 Renew “Quench Liquid” 更换冷却液。 Regulate Clearance 调整间隙。 Clean Bearing by Gasoline 用汽油清洗轴承。 Renew Bearing and Guide Wheel 更换轴承与导轮。 It should elaborately regulate kinetic requiremetns from “Guide Wheel”. 应精心调整导轮运动要求。 Adjust “Installation Position of Step-Motor” to make even Clearance 调整步进电机安装位置使间隙均匀。 It should make re-adjustment. 应重新调整。 It should check whether it is normal or not to “Step-Motor” and “24V Drive Voltage”. 须检查步进电机及24V驱 30