A few kinds of of breakdown of difficulty of machine tool of diagnostic numerical control special methods

The law of the imitate that divide a pace of quick procedure has some of control process, rise automatically like what the pace enters electric machinery fall fast process, of dc governor jockey process of apply the brake, have the instantaneous time of zero second only. This plants look up the circuit breakdown of quick procedure, cannot use general appearance to undertake breakdown dogs apparently detect, it is more difficult that so breakdown is diagnosed. Breakdown example is passed below silicon controlled rectifier of one 5V dc advocate drive jockeys the breakdown with too long time, the special method that introduces us to use law of imitate of a minute of pace. Pass the preliminary check-out of pair of reason baffle, judgement breakdown reason is in V5 advocate circuit of driver apply the brake. Logic of control of this apply the brake is complex, involve circuit much, diagnostic breakdown is not the fatigue of raise one's hand definitely, and because course of apply the brake is short, cannot measure, so we use law of the imitate that divide a pace to undertake diagnostic checking. Be informed process of apply the brake to be as follows by circuit principle: (1) this bridge inversion, release energy; (2) change the bridge automatically, regenerative braking; (3) change the bridge again, circuit recovers from an illness. Measure the need of the quantity to divide a pace, with speed feedback of instruction, speed and voltaic feedback are set to measure, it is above process fractionize 8 measure (the row is expressed into a piece) , change corresponding set to measure stage by stage next, detect concerned circuit signal, contrast circuit is logistic, failure isolation. We do the test that divide a pace to have the 2nd situation (namely speed dictates by 1 change 0) when, discovery " move after A " and " integral stops " all be tall n, press circuit logic, should be low n, check accordingly circuit, in finding out A2 board very quickly with the Dl06 that be not the door (model: FZHI01) have a problem, after changing, trouble removal. 3. One OS3 of CT4 Cha Pin implement CT4 of a special breakdown one Os3 transducer is commonly used the knife library drive at YBM90 and MK5oo machining center. In maintenance, we come up against this transducer stand or fall for many times lack photograph breakdown, and be measured be short of phase voltage to have 60 only to 2ooV (it is 400v) normally. Because this is the soft breakdown of a kind of stand or fall, diagnostic look up is difficult. But, we discover this transducer the most reason of this kind of breakdown is issue of pulse segregation class -- oscillation is not stable. Phenomenon of this kind of breakdown, with oscillograph examination, discover very hard " undee and missing " , but have amplitude of 3 groups of pulse commonly unequal, even difference is soft big phenomenon. Actually, characteristic that keeps apart class circuit can see anatomize problem, this is a more special intermittent oscillator, use pipe of 2 3 class only, make oscillation canal and oscillator mains switch respectively. Because use sheet to be in charge of oscillation, and oscillating circuit strings together current limliting resistor and 2 dynatron, add transformer to output load, oscillating circuit loss is so big, gain is small, cause circuit easily abiogenesis sex stops brace up the defect that is not worth with pulse amplitude, the electric machinery that produces stand or fall namely lacks photograph breakdown. From above the analysis can see, this kind of circuit is worth to pulse transformer Q and requirement of dynatron β worth is strict, when the user is maintained, can use following measure to get redeeming: (1) choose tall β (120 to 180) oscillation canal; (2) reduce block of current limliting resistor to be worth appropriately, go up in 51 Ω resistor namely and receive 100 one 270 Ω . 4. Diagnose the typical example that drive of CVT035 transistor dc adopts below a variety of breakdown syndrome, show the diagnostic method of a variety of breakdown syndrome. This breakdown servo board, see via preliminary check-out, circuit board exterior is very dirty, output level burns caustic serious, the care and maintenance of visible user is more defective, handle this kind of trouble, should keep clear of above all dirty content, repair outputs class, avoid by all means is rushed electrify, cause short circuit possibly otherwise, enlarge breakdown face. For example the electric short circuit of iron pink dirt, the short circuit that outputs the class before class switch is in charge of puncture to be opposite and power source is waited a moment. Via afore-mentioned processing hind, electrify examination discovers following fault again: (1) " owe pressure " red light sometimes ablaze (" READY " green light shines destroy) ; (2) electric machinery does not turn; (3) switch power source (± 15V) unusual hair of transformer Tl and V69 of mains switch canal is very hot. This is a typical syndrome, and the likelihood exists between breakdown some kind is causal, so processing breakdown needs to undertake orderly, otherwise likelihood get half the result with twice the effort, cause breakdown face to expand even. We pass an analysis, make following maintenance sort: Switch power source one ＞ " owe pressure " the lamp -- ＞ electric machinery runs. Check power source board above all, through measuring advocate loop 150V volts d.c. and disconnect after the examination of ± 15V load, be informed breakdown in switch power source board is in-house, the voltage that discovers in checking power source board 10V stabilized voltage is in charge of V32 has 9 only. 5V, check from this go down, find breakdown reason: The value of block of Rl85 of current limliting resistor of V32 greatens. Change after Rl85, ± 15V power source board and " owe pressure " the lamp all return to normal, but electric machinery still does not turn. Visible, above lamp shines and component hair is ironed all change by Rl85 the value is caused, electric machinery does not turn to have a reason additionally. Press normally examination method, can chase class to detect, but the cause as a result of experience, we do simple commutation rotation test only, the result discovers retrorse movement is normal, so reason of very fast failure isolation: The collect of inverting circuit is agglomerate N5 (TL084) invalidation, change after N5, everything is normal. 5. PC interface law because numerical control machine tool each are unit (outside removing driver) with numerical control it is to pass PC interface between the system (1 ／ O) realize signal deliver and control, accordingly, a lot of breakdown can pass report of PC interface signal come out, we are OK through consulting the signal of 1 ／ O of PC bed side diagnoses all sorts of complex machine tool breakdown or differentiate breakdown to be returned in numerical control system is to be in the machine tool is electric. Its method is very simple, ask to be familiar with all PC namely (machine tool side) the active position of interface signal and whack (or make a piece of form) , when diagnosing, pass pair of all PC (machine tool side) the active position of interface signal and whack one by one are examined than be opposite, find out the interface signal that has trouble, concern according to the exterior logic of signal next, failure isolation reason. After you were familiar with PC interface signal, apply interface of this kind of PC to compare pair of standards, very handy fast quick, and avoided the echelon plan program with cent complex board. 6. Data of system of Xi Menzi 3GG restores Swiss STUDER S45 unusually one 6 grinder provide system of Xi Menzi 3GG, for structure of double NC double PLC, this system is had diagnose a function very by force oneself, when malfunctioning, can clew of screen of have the aid of, diagnose repair breakdown quickly. But if produce a system to cannot be started, and PLC is in suspend status, screen is not bright, so diagnose a function of the system to will not produce effect oneself, cause diagnostic difficulty. The reason that produces this kind of breakdown is more, if batteries voltage is low at 2. 7V, must change batteries; If NC or PLC hardware damage, need changes circuit board; If the 24V power source of the machine tool under 21V, need checks power source circuit and load. But we come up against more breakdown reasons is not hardware breakdown, however machine tool data is unusual this kind of soft breakdown. Its matter is more complex, missing or what wait to all cause machine tool data likely like error of invalidation of interference of electrified wire netting, electromagnetic wave interference, batteries, operation is confused, system of as a result cannot be started. Like this kind of soft breakdown we can use complete Qing Dynasty to restore a law to make the system restores to move. The completely clear move of 3GG system is as follows: (1) data of machine tool data, user program, set and setting put store implement cleared; (2) the initialization of 3GG system; (3) PLc to clear; (4) the full data that restores to be kept clear of, program. Need set baud rate commonly, v 128KB memory, next, wait for media data-in, program through disk. (5) all KV coefficient that experiment and checks servo. (6) after completing these step, the system returns to normal. CNC Milling