Summary: The article from memory of the software problem that solves memory chip, magnetism bubble board change model when how to ensure the machine tool moves normally, electromotor of use grating feet, servo appears " float 0 " , brake of the interference to CNC system, brilliant provides the electromagnetism part such as contactor and relay, introduced the skill that system of machine tool numerical control overhauls. Keyword: System of machine tool numerical control; The overhaul; The graph in skill classifies date: TH17 document label piles up: B 1. The A 16B of system of F11T of Japanese FANUC company - 1210 - 0470VROM board use software of function of system of the numerical control that put store, this part content does not allow an user to revise, buy this as spare parts board when also do not supply the chip that put store, and the price when the user buys this chip software is quite high. For this, be in plain below the circumstance that the EPROM chip of ROM board seals dead, oneself design periphery circuit, numerate the content of lay aside of every chip memory come, write in the blank chip that is the same as model bat again, solve the software problem of the chip that put store thereby. But managing repeat the charge that buys software. 2. The magnetism bubble of this system puts store implement board model is A87L - 0001 - 0084, it uses parameter of the system that put store and machine program. Change new board when, the operation method that should press maintenance manual only has the move such as initialization operation can. But if change new-style SRAM (BMU)1M - 1 (A16B - 2001 - 0132A) , do not need initialization, what need a CNC only is optional parameter (Option) new input, next reintroduce parameter and spare parts machine program, the machine tool can move normally. 3. The measurement of numerical control machine tool the system uses grating rule in great quantities, the flatness that in using, should notice to install the surface and the parallelism with slideway satisfy the requirement of manufacturer home manual. More important is to should avoid dirt and oily mist to enter grating feet, when systematic work environment poorer or when relative humidity is more than 80 ％ , can consider to add outfit air to purify a system for grating feet. 4. Servo electromotor appears " 0 float " , falling without athletic jussive circumstance namely, feed electromotor has slight vibration, affect treatment precision thereby. Settlement method is to make sure unit of numerical control system, servo and electromotor are good ground connection, it is the potentiometer that adjusts wait to take output board to go up next (potentiometer of accent datum mark) . Because the machine tool moves for long, the machine tool when adding cutting is oscillatory, make potentiometer becomes loose easily. So, ground connection result is bad to become loose with potentiometer it is generation " 0 float " main reason. 5. The electromagnetism component such as the contactor in ark of strong report of numerical control machine tool, relay is the interference source of CNC system. The three-phase input of the two end that communicating contactor coil or AC motor carries shunt-wound RC network (take 1kW above electromotor commonly with 0. 630V of Ω of 47 μ F100, electromotor is used under 1kW 0.
630V) of Ω of 47 μ F 200; And the coil to dc contactor or dc magnetism a powerful person, merge into instead in their two end diode of a follow on current. These method all can restrain the interference that electric equipment generates. But should notice a bit, the connection that draws a network should not be more than 20cm, the position jumps over close result to jump over beautiful from inductance. Additional, the share of input power source that controls circuit in CNC system also should take step. It is shunt-wound between three-phase power supply cord surge is absorbed commonly implement, can absorb the aiguille voltage in electrified wire netting effectively thereby, have certain protective effect. 6. In circuit of speed control unit, when once discover brilliant brake provides power module breakdown,burning caustic, detect above all and receive in dc motive the starting contactor of two end (MCC) often close contact act agile, whether is contact surface put in ablation adhesion phenomenon, even if safeguard at ordinary times also should regard an examination as the key, because this constant closes contact,be resistor of follow on current is passed after cutting off the power for dc motive (DBR) make this electromotor forms discharge loop and design technically. When having power source instantaneous to cut off the power, the impact that can avoid dc motive to turn over electromotive force to be in charge of module to brilliant brake is affected. Once this contact produces ablation and adhesion breakdown (even if spend ablation adhesion gently) or when contact movement is unresponsive, unit is controlled likely in speed when after instantaneous cuts off the power, switching on the mobile phone again, power module passes this contact and instantaneous short circuit, cause power module puncture to burn caustic, must cause enough attention so. 7. Systematic printed circuit dominates in logarithm board when undertake maintaining or checking, should quit job of circuit board oscillator, because circuit board is major,trigger is linked together with clock signal, if board on have clock signal, the meeting when checking with instrument causes bigger interference to instrument. 8. Numerical control system changes the processing after spare parts. The batteries in numerical control system must disassemble when electrify, CM0 CPU board, NC CPU board, PLC CPU board, coupling RAM board, part program stores board unplug after falling, install a system to also cannot work normally again, need to do further processing. If change coupling RAM board hind, need division of data of cleared machine tool, input machine tool data afresh; Change CM0 CPU board with NC CPU board hind, all need a format to turn NC data area; Change PLC CPU board hind, need cleared PLC, input DB piece; Change part program stores board hind, need memery block of cleared part program, input a program afresh. CNC Milling
CNC Machining