Numerical control machine tool controls trouble removal method and application

Maintenance technician passes direct law the observation of the unusual appearance such as all sorts of light when breakdown happening, sound, flavour, each parts that watch a system seriously narrow breakdown limits a module or presswork together circuit board. Measure fault line through eye board, microscope has fusing of the fracture of wire that do not have frit, yuan parts of an apparatus phenomenon of burned-out, craze, decide thereby have had not had stream, be pressed too or short circuit. Feel yuan of parts of an apparatus to have with the hand without become loose, in order to check solder of a few empty, rupture problem. Use case: Configuration has the numerical control lathe that sends FANUC 0i Mate C of that branch system to machine a process in, suddenly occurrence main shaft stops machine. Check above all advocate whether does power source electrical outlet cut off the power, if in good condition examination is safe. Open examination of electric equipment ark to discover canal of insurance of electric machinery main circuit is burned-out, change new insurance. Analytic reason, because power of main shaft electric machinery is lesser, dosage of the cutting when treatment is bigger, electric machinery overload cannot work normally bring about. Change new insurance breakdown is eliminated, the machine tool returns to normal. 2.

Law of commutative law trade is analysing a breakdown namely roughly below the circumstance of origin, use spare presswork chip of circuit board, pattern plate, integrated circuit or component replace the share that has doubtful point, narrow breakdown limits thereby presswork circuit board or chip one class. Use case: An industry CNC Milling, configuration China is mediaeval system of galaxy all H N C-21M, breakdown phenomenon is Y axis to be not moved suddenly in machining a process and without call the police, after this is moved in the hand no matter or axis of the Y below means of automatic, MDI all does not have a movement, but X axis and Z axis are normal. Decide to locate breakdown in electric part after barrier of mechanical part without reason first, if the join principle graph between driver of numerical control device, servo and servo electric machinery pursues 1 is shown. Driver of device of concerned numerical control of analysis and Y axle control, servo and servo electric machinery 3 person in any occurrence breakdown all can appear this breakdown. Because the servo drive of X axis and Y axis is same, because this uses commutative method, driver of Y axis servo and the X axis servo that affirm without reason barrier driver crossing-over, discover Y axis breakdown disappears, x axis is not moved. Can conclude driver of former Y axis damages right now. Change new driver trouble is eliminated, the machine tool returns to normal. 3.

The principle analyses a law to constitute a principle according to CNC, the logistic n that from logic the analysis nods each and diagnostic parameter, from the system the working principle proceed of each component is analysed and judge, determine the maintenance method of breakdown place. Of this kind of method apply, the job of requirement maintenance technician to whole system or every component it is clear that the principle has, more thorough knowledge, just have fixed position possibly to breakdown place. Apply case 1: Device of numerical control of SINUMERIK 810D of Xi Menzi system, random tooth phenomenon appears when machining whorl. According to fundamental of pilot of position of numerical control system, OK and affirmatory breakdown goes out rotating on coder, and it is feedback signal is lost likely very, such, once numerical control device gives out the statement position of feed, the real position of feedback is incorrect from beginning to end, position error is indelible from beginning to end, cause whorl interpolation occurrence problem, tear open next pulse coder to undertake checking, discover the filament in coder already was broken, bring about input signal without feedback. Change after coder, trouble removal. Use case 2: Configuration has China the CNC Milling of all HNC - 21M is in mediaeval galaxy to park position urgently all the time, cannot restoration. The hookup of whole and electric return circuit is shown 2 times like the graph, see from the graph the likelihood causes the matter that stays loop urgently not to close to have OK and clearly: (1) stops loop open circuit urgently; (2) spacing switch damages; (Attaint of 3) emergency stop button. If the machine tool is in all the time,park position urgently, check relay of the KA in stopping loop urgently to whether be sucked above all close, if relay is sucked close and the system still is in park position urgently, can judging a breakdown is not out respect of electric return circuit. Can search from other reason at this moment, if relay was not sucked,close, because stop loop open circuit urgently to cause,can judging a breakdown is, can use avometer to be opposite at this moment whole stop loop urgently to undertake checking stage by stage, check emergency stop button often close contact, affirm emergency stop button or whether does journey switch damage. Emergency stop button is the one part in stopping loop urgently, the attaint of emergency stop button, can cause whole the open circuit that stops loop urgently, check those who exceed Cheng spacing switch to often close contact, if was not installed,hold emergency stop button is not had on unit, in XS8 interface 4, 17 feet should short receive. Measure stage by stage, affirm breakdown is in finally switch of Z axis journey cannot restoration be caused by. 4.

When parameter checks system of law numerical control to discover fault, answer to check in time systematic parameter, the change of systematic parameter can affect the performance of the machine tool directly, make the machine tool cannot work normally even, occurrence breakdown, parameter is deposited normally in magnetism bubble memory or by batteries in retentive CMOSRAM, once outside interference or batteries voltage are insufficient, can make systematic parameter missing or produce change and cause confused appearance, through checking, correction parameter, can remove trouble. Use case: China device of numerical control of HNC-21 of mediaeval galaxy all, the dimension when machining a diameter is incorrect, cause treatment failure. Search an account, the measure in seeing a program above all is true, if do not have a mistake, examine initiative parameter set. Before modification parameter, must understand the function of parameter and value of familiar and primitive set, incorrect parameter setting and revise, the likelihood causes serious consequence. Press option of F10 switch parameter above all, the switch that press F3 indexes to parameter, input countersign by F3 again. Axial parameter can choose by F1 after countersign is correct, choose an axis 0 after deciding, check the numerical value of element of exterior pulse equivalent and exterior pulse denominator. Through searching machine tool parameter, the machine tool is the servo electric machinery of 10000 lines coder, guide screw is 6mm, gear decreases speed ratio to be 2:3, so electric machinery every turn circuit, 6mm of machine tool motion. 6 × 2/3=4mm, according to element of equivalent of formulary and exterior pulse (electric machinery of = of denominator of equivalent of μ M)/ exterior pulse every turn shift of circuit machine tool is apart from / 10000, namely equivalent of 4000 in-house pulse, 4000/10000=2/5, the element of exterior pulse equivalent of 0 should be the axis 2, denominator should is 5. Numerical control plant must be started afresh after parameter is revised, become effective of new parameter ability. 5.

The CNC system that uses machine tool parameter to maintain company of wh whichever of numerical control machine tool has many parameter, these parameter settings affected numerical control correctly to use the play with function of the machine tool normally directly. Use period of time in the machine tool however hind, some parameter need to be adjusted appropriately or be installed afresh, can affect the performance characteristics of the machine tool otherwise. Apply case: ? Yao of  of enemy fade of anxiety ü ひ swings Bo  to waterside Xing of Ga hoarse  orchid hold N C of low Chang of a key to do sth in the palm - device of 21T numerical control, size of direction of axis of the Z when machining a spare parts is incorrect. After eliminating program error, conclude because the machine tool locates precision has a problem,this breakdown is, after examination backlash is then normal, affirmatory guide screw has pitch error. Because pitch error can use parameter compensation, the method that because this is used,revises machine tool parameter comes repair. Repair process is as follows: (1) switchs on the mobile phone before measure enter a system, ordinal by " F3 parameter " key, press again " F3 inputs attributive " key is entered below one child menu, press parameter of manufacturer of F1 numerical control, input countersign of attributive of numerical control manufacturer, initiative countersign is " HIG " , carriage return is pressed again " F1 parameter indexes " key, press again " F 4 axis compensating parameter " key is shown 3 times like the graph, mobile cursor chooses " axis 2 " carriage return, enter systematic Z shaft namely compensating parameter interface, compensating parameter of systematic backlash, pitch all setting is 0. Press " Esc " key, interfacial occurrence dialog box " whether to save modification parameter? " , by " Y " the parameter after revising is saved after key. By " F10 " key is returned advocate interface, press again " Alt+X " quit a system, enter a system afresh again. (The journey of axis of 2) foregone Z is 500mm, compensation interval is 50mm, equivalent of mobile axis interior is 1 μ M, reference point position is 0, the data that uses step pitch compasses and dial gauge or laser interferometer to measure each compensation point (reference point is winded first when measuring) , among them workbench to negative to data of each measurement point is as follows when shift: - 5 0 0.

1 4, - 4 5 0.

1 1, - 4 0 0.

1, - 3 5 0.

0 8, - 3 0 0.

0 5, - 250.

06, - 200.

04, - 150.

02, - 100.

01, - 50.

005, 0 workbench measure bit of data to be as follows each when Xiang Zhengxiang is mobile: - 5 0 0.

2 0, - 4 5 0.

1 8, - 400.

15, - 350.

12, - 300.

10, - 250.

10, - 200.

07, - 150.

06, - 100.

04, - 50.

05, 0.

03 (3) basis is formulary: "Position of statement of machine tool of ＝ of cost of pitch error compensation - the machine tool is actual the position " , computational pitch error compensates a value. Workbench to negative to shift it is each measurement point (the position of each measurement point by lose arranging) cost of pitch error compensation is (unit: μ M) : 140, 110, 100, 80, 50, 60, 40, 20, 10, 5, when 0 workbench Xiang Zhengxiang is mobile each measurement point (the position of each measurement point by lose arranging) cost of pitch error compensation is (unit: μ M) : 200, 180, 150, 120, 100, 100, 70, 60, 40, 50, - 30 (4) writes compensating parameter the system. When undertaking two-way pitch error is compensated, backlash is 0, snail filling type is 2, compensation point number is 11, reference point deviation is 10, compensation interval is 50000, deviation is worth fill in should input first to data, be defeated after negative to data, deviation is worth 0 for 200, deviation value １ is 180, deviation is worth 21 for 0. (5) exits a system to be entered afresh, try car work, breakdown phenomenon disappears. 2, maintenance of last word numerical control still has a lot of detecting method and maintenance method, in numerical control machine tool, major hitch has a data to be able to be checked, but also have a few trouble, offer call the police information is more ambiguous, do not have at all even call the police or do not have the rule, we should be analysed according to actual condition spot, the integrated knowledge of the respect such as mechanical, electric, hydraulic pressure needs particularly when the examination, judge the issue accurate, with the most effective, most the method of save trouble trouble removal. CNC Milling