Numerical control technology applies a characteristic mediumly in the machine tool

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  • source:LAURENDA CNC Machining
Dispatch of net of machine tool of Chinese numerical control: As the rapid development of machine tool industry, numerical control technology is producing main effect, it basically finishs special clavier to input the collection of key-press signal, encode and memory job, arise to interrupt signal, request labour accuses machine read value extraction key to make corresponding processing respectively. Special clavier should finish have the aid of to all sorts of operation jussive are inputted and machine craft to control the parameter input of the file. Card of control of drive of servo of much axis communication parts to comprise servo of 2 half closed circuit to control a system with electric machinery of amplifier of 2 groups of servo, servo and coder. Its are main the task is basis labour accuses machine sent order, finish pair of servo electric machinery start, quickly, decelerate and stop to wait for control, the athletic condition generation that depends on 2 servo axis interrupts signal 6 times: Position error exceeds be restricted, dot of transmission midway gearshift already arrived, the value folds positional tally completely return, coder graduation locates mark and illegal control command. Light lies between a number to output card and relay of a SSR modular group port board finish pair of wheelhead electric machinery jointly, the head wears electric machinery, cooling a powerful person, go up, next makings orgnaizations, receive makings orgnaization, clamping apparatus filter cloth cleaning device, output of amplifier of servo of X axis, Z axis makes can, call the police the output control that waits for switch control signal. Card of digital signal input and a light lie between an input port board is over to go up in couples jointly next makings, makings, receive makings orgnaization and X axis, Z axis of signal of condition of signal of 5 pairs of spacing and machine tool refrigeration, lubricant system monitor. Hold the post of one road spacing signal to all can be caused among them hard interrupt, guarantee against causes the damage of mechanical system. The characteristic that controls a system is as follows. Servo controls precision analysis to have particular mechanical strength to assure servo drive take-off, workbench drive part uses pitch to be the ball silk lever of 6mm, and the coder that installation is in rear of servo electric machinery every time servo electric machinery turns a week produces 4096 pulse, output the pulse tally to servo control plate. Accordingly, every pulse is in theoretic correspondence at 1.

The workbench displacement of 4m, be less than a design the requirement is allowable the 1/5 of the error.

It is normally in system of high accuracy control, academic design error takes the 1/3 ～ 1/2 with poor allow commonly, look so from signal resolution, the design of completely OK and contented system asks, test result confirmed the validity that this chooses. Servo control means and signal convey to kind is answered to make sure the computer has enough time and handle the special order of the user, satisfy the requirement that controls precision at the same time, used control plate of servo of PID of PID parameter adjustable. Labour accuses machine before dominating a command to control plate hair, want parameter of basis displacement, speed, acceleration to choose reasonable PID coefficient only, the speedometer numerical value that the academic pulse computation with computation and corresponding displacement is worth and gets with the principle that need branch and accelerometer are numeric, after passing afore-mentioned each costs servo control plate, labour accuses machine finished servo pilot 1 times to output an operation. Accordingly, labour accuses machine many time goes handling exterior request and condition to show. Even if when two axes linkage is controlled, by the machine the code gets two axes to start time difference to be only 1.

2 × 10-7s, below the circumstance of 3000r/min, the displacement error that causes from this is about 0.

03m, reason is negligible not plan. All set component of one suddenly Er to each controlled machine sensor, detect whether do its reach ultimate place, can protect each motion orgnaization to be not destroyed, use at setting the coordinate origin of servo axis. These detecting signal accuses through suspending request means and work machine produce connection. The control signal that in machining a process circularly, inputs from laminating clavier also is used interrupt means and labour to accuse machine connection, labour accuses machine make corresponding processing respectively through bolting the value is analysed. Breakdown of special machine tool and protective control are prevent an accident, control system sets 3 kinds of safe protection to come break down treatment moves. The 1st kind is advocate those who accuse ark to go up is urgent stop machine button, when it presses, will accuse to servo amplifier and labour machine issue signal of one low n at the same time, its action is to make servo amplifier is defeated by be sent on a diplomatic mission can signal position 0, part of break down servo is outputted, and labour accuses machine after receiving this signal, release all output, guide afresh enter treatment initiative preparation condition. The 2nd kind is the gules pause button that goes up through laminating key, make control software to enter suspend a service specificly, remove two servo rod in time to origin the lock is decided, release other and exterior output, be in next await condition. The 3rd kind is advocate accuse board the power source that go up controls button, press this button will cut off labour to control the power supply of machine and servo amplifier, it is urgent stop the control of machine to protect pushbutton. CNC Milling