What mechanical generation crawls is former because procrastinate board slideway wears away fierce, filar lever ball wears away or become loose. The machine tool should notice to maintain, iron wire should be swept after commuting, add lubricating oil in time, in order to reduce attrition. The problem with not stable dimension of treatment of numerical control cutting can say to let a person very headached, small arrange the means of settlement that summed up 10 kinds of common circumstances and correspondence for you. 1, workpiece size is exact, the surface is bright and clean reason of the breakdown that spend difference: Point of a knife of 1) cutting tool is damaged, not sharp. 2) machine tool produces resonance, place not smooth. 3) machinery has creeping appearance. 4) treatment technology is bad. Solution (with on contrast) : 1) cutting tool wears away or damage hind is not sharp, the cutting tool with grind a knife afresh or choose better is opposite afresh knife. 2) machine tool produces resonance or place not smooth, adjust a level, lay next foundations, fixed and smooth. What 3) machinery produces crawl is former because procrastinate board slideway wears away fierce, filar lever ball wears away or become loose. The machine tool should notice to maintain, iron wire should be swept after commuting, add lubricating oil in time, in order to reduce attrition. The cooling fluid; that 4) chooses to suit workpiece to machine is below the condition that can obtain other working procedure to machine a requirement, choose higher main shaft rotate speed as far as possible. 2, reason of breakdown of phenomenon of differ in roll end diameter of workpiece generation taper: The standard that 1) machine tool sets was not adjusted good, one tall one low, generation is placed not smooth. When 2) turning grows an axis, workpiece data is harder, cutting tool penetration of a cutting tool is deeper, create appearance letting a knife. 3) tailstock thimble and main shaft are not homocentric. Solution 1) uses gradienter to adjust the level of the machine tool to spend, lay next solid groundwork, had secured the machine tool raise its tenacity. 2) chooses sound technology and proper cutting feed to avoid cutting tool to suffer force to let a knife. 3) adjusts tailstock. 3, driver is phasic the lamp is normal, but machine tool of 1) of of differ breakdown reason pulls work measure board long-term high speed moves, bring about filar lever and bearing to wear away. The repetition of 2) tool carrier locates precision produces deviation in be used for a long time. 3) procrastinates board every time can accurate return treatment start, but treatment work measure still changes. This kind of phenomenon is caused by main shaft commonly, the high speed roll of main shaft makes bearing wears away serious, bring about treatment dimension to change. Solution (with on contrast) 1) leans in tool carrier bottom with dial gauge, edit program of a fixed loop through the system at the same time, the examination procrastinates board repeat fixed position precision, adjust filar lever clearance, change bearing. 2) repeats fixed position precision with what dial gauge checks tool carrier, adjust machinery or change tool carrier. 3) detects with dial gauge after processing work whether can accurate it is OK to return program start; to be like, overhaul main shaft, change bearing. 4, work measure changes, or the rate that 1) of of reason of axial change breakdown locates quickly is too rapid, drive and electric machinery response do not come and arise. 2) is mechanical after long-term attrition wears away pull board silk lever and bearing to get stuck too closely dead. Too loose lock is incompact after 3) tool carrier changes a knife. 4) editing process is wrong, head, end does not have echo or did not cancel a knife to fill to end. The electronic gear of 5) system is compared or step pitch horn installs a mistake. Solution (with on contrast) rate of fast fixed position of 1) is too rapid, the rate that adjusts G0 appropriately, cutting adds decelerate to spend make with time driver and electric machinery leave normal action in rated running frequency. 2) procrastinates in the generation after occurrence machine tool wears away board, filar lever and bearing get stuck too closely dead, criterion must readjust rehabilitate. After 3) tool carrier changes a knife too loose a reversing time of examination tool carrier is contented, whether does the turbine eddy lever that checks tool carrier interior wear away, clearance whether too big, whether does installation cross a pine to wait. If program reason causes 4) , must modify a program, ask to improve according to workpiece blueprint, choose sound treatment technology, by the statement that reflects a manual the requirement writes proper program. If 5) discovers dimension deviation checks systematic parameter too big to whether be installed reasonable, especially whether is electronic gear is compared and the parameter such as step pitch horn destroyed, appear this phenomenon can be measured through making 100 lists. 5, effect of treatment circular arc is not ideal, dimension is less than the jackknife of a frequency of vibration of 1) of breakdown reason to bring about resonance. 2) machines craft. 3) parameter setting is unreasonable, feed rate is too old, make circular arc treatment loses a condition. Clearance of 4) silk lever causes greatly become loose or filar lever causes too closely lose a condition. 5) synchronism belt wears away. Solution 1) finds out generation syntonic component, change its frequency, avoid resonance. 2) considers the treatment craft of workpiece material, program of reasonable work out. 3) enters electric machinery to the pace, treatment rate F cannot have been installed big. Whether is 4) machine tool installed firm, place smooth, procrastinate board after whether wearing away, tighten too, clearance increases or tool carrier becomes loose etc. 5) changes synchronous belt. 6, in batch production, now and then in production of batch of 1) of of occurrence workpiece out of tolerance now and then appear a dimension has change, need not revise any parameter rework next, return to normal however circumstance. 2) is in batch production now and then appear a dimension forbids, continue to machine dimension again next still unqualified, and be opposite afresh after the knife accurate. Solution 1) must check tool clamping apparatus seriously, and the operation method that considers handlers, because the dependability; that reachs outfit clip installs the dimension change that clip causes, must improve tool to make the worker avoids to make appearance of miscarriage of justice cursorily artificially as far as possible. System of 2) numerical control may get the wave motion of outside power source or after be disturbed, automatic generation disturbs pulse, pass drive to cause drive to accept redundant pulse drive to electric machinery goes more or walk along phenomenal; understanding less to grasp its pattern, adopt the measure of a few interference rejection as far as possible, be like: The line of the strong report cable that strong electric field disturbs and weak report signal is kept apart, the absorption that joins interference rejection capacitance and use screen line segregation. Additional, whether does examination ground wire join firm, ground connection contact is the most intimate, adopt all interference rejection measure to avoid a system to suffer interference. 7, every working procedure of workpiece has the program of 1) of of phenomenal breakdown reason that increase by degrees or decreases successively to write a mistake. Setting of 2) system parameter is unreasonable. 3) configuration setting is undeserved. 4) machinery drive disk assembly has the metabolic trouble with seasonal pattern. Whether does the statement that program of inspection of solution 1) uses press the requirement contrail that the manual sets to carry out, can be judged through making 100 lists, after the start that locates dial gauge in the program lets a program end, procrastinate board whether to return start position, repeat again carry out observation a few times its result, grasp its pattern. Whether is parameter of 2) inspection system installed reasonable or be altered artificially. The machine tool that 3) concerns configures the computation on parameter of join computation coupling to whether accord with a requirement, pulse equivalent is accurate. 4) checks part of machine tool drive to have damage, gear coupling is even, whether does the examination exist periodic, regularity breakdown phenomenon. If have an examination,its key gives half eliminate. 8, work measure and real measure differ only machine tool of 1) of of reason of a few breakdown grinds in be used for a long time, wear away, the clearance of filar lever as increase, backlash crosses the filar lever of the machine tool the dimension of ambassadorial treatment process floats errant, the error of reason workpiece always changes inside this clearance limits. The cutting tool type selecting that 2) treatment workpiece uses is incorrect, fragile, frame-up or clip of cutting tool outfit is incompact wait. 3) craft respect chooses speed of feed of reasonable main shaft rotate speed, cutting and cutting quantity according to workpiece material. The balance that 4) and machine tool set is spent and firm sex is concerned. The power when generation of system of 5) numerical control breaks pace or drive type selecting is insufficient, torque is small wait for reason generation. Whether to after 6) tool carrier changes a knife, chain locking. Whether does 7) main shaft exist jumpy string move and tailstock coaxial spends the phenomenon such as difference. 8) closes in field of a few special treatment, backlash cannot fill, bringing about treatment always is existence deviation. Solution (with on contrast) machine tool of 1) wears away after filar lever clearance greatens, through adjusting filar lever nut is mixed long in tightening, procrastinate board line reduces gap, or reach through making 100 lists clearance is worth (general clearance is in 0. 15 Mm less than) can fill into computer, the space that can pass computer compensates a function to replace clearance, make work measure accords with a requirement. Because 2) is cutting tool material makes machine work measure to produce change character, press a demand logical choice cutting tool, and an according to workpiece craft requirement that because clip of cutting tool outfit is frame-up,waits for reason generation is reasonable angle of choice cutting tool and tool clamping apparatus. 3) should suspect the craft that is treatment respect the problem, criterion the property according to material, weave treatment craft chooses proper main shaft rotate speed reasonably, cutting feed speed and cutting are measured. 4) is caused as a result of machine tool resonance lay the machine tool smooth, adjust good level, lay next groundwork when necessary, installation is firm. The size that system of 5) numerical control produces changes, judge a program to whether ask to weave by blueprint dimension above all, the parameter that checks a setting according to chooses configuration again next is reasonable (be like: When speed of G0 fast fixed position and cutting add the) such as slowdown time constant. Whether somebody alters intentionally, it is a consideration next the driver power size that place choosing matchs is reasonable, whether does the pulse that sends drive through judging phasic lamp to survey computer have the appearance that lose a condition. The reversing time after 6) checks tool carrier to change a knife is enough, whether to make tool carrier has enough time to come locking, whether do the fixed position that checks tool carrier and locking screw have become loose. The coaxial with tailstock spends 7) examination main shaft to whether exist jumpy, string move wait for a phenomenon. 8) uses process designing skill to eliminate gap. 9, the dimension change that the system causes does not stabilize parameter of system of 1) of breakdown reason the setting is unreasonable. 2) job voltage is not stable. 3) system suffers exterior interference, bring about a system to lose a condition. 4) already increased electric capacity, but the impedance between system and driver does not match, bring about useful signal to lose. Signal is transmitted between 5) system and driver incorrect. 6) system attaint or in-house breakdown. Solution (with on contrast) rapid rate of 1) , quicken time to whether pass big, main shaft rotate speed, cutting rate is reasonable, whether to because the parameter of handlers is revised,bring about systematic performance to change. 2) adds equipment of outfit stabilized voltage. 3) ground wire decides reliable already join, the interference that adds interference rejection to absorb the transducer below the situation with capacitance general; in place of contact of driver pulse output is bigger, ask in what take load please besides reason, because jump over big laden conference to make transducer load current bigger, the interference of generation is bigger also. 4) chooses proper capacitance model. 5) checks the signal jumper between system and driver to whether take screen, join is reliable, check a system to whether is pulse happening signal lost or increase. 6) sends a factory maintenance or change advocate board. 10, the treatment dimension that mechanical respect causes does not stabilize pace of 1) of breakdown reason to enter electric machinery damp piece whether be tightened too or loosen too. Outlet of 2) electric machinery causes insulation property to drop into water, electric machinery attaint. 3) machines the workpiece differ in roll end diameter that go out, outfit clip is undeserved. 4) workpiece occurrence ellipse. 5) silk lever backlash is too big. Installation of lever of 6) mechanical silk is too close. Solution (with on contrast) 1) adjusts damp dish, make electric machinery is in blame resonance condition. 2) changes electric machinery outlet, had done defend, or it is to change electric machinery. 3) checks feed to measure what whether cause too big or too quickly to pass negative charge, clip of examination workpiece outfit should not extend chuck too long, avoid to let a knife. What 4) checks main shaft is jumpy, overhaul main shaft, change bearing. 5) checks the backlash of filar lever through hitting dial gauge, whether to already fill clearance from the system, whether does the clearance after filling pass big. 6) checks filar lever to whether be put in crawl, whether to exist answer slow phenomenon. CNC Milling