Does numerical control machine tool compensate you to understand really

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The machine tool provides the mechanical and relevant deviation of some systematization, can be recorded by the system, but because be put in the environmental element such as temperature or mechanical load, in follow-up use process, deviation appears possibly still or increase. Below these circumstances, SINUMERIK can provide different compensation function. Use real position coder (like grating) or additional sensor (wait like laser interferometer) acquisition measured value will compensate deviation, achieve much better treatment result thereby. This period introduce the compensation function with common SINUMERIK to everybody, “CYCLE996 motion measures the practical SINUMERIK such as ” to measure a loop to be able to be in the abidance of the machine tool monitoring and overall support is provided for final user in maintaining a course. Backlash compensation moves in the machine tool component and its drive component, be like ball guide screw, the generation of the meeting when delivering that power has between is discontinuous or defer, because do not have the rigid structure of clearance completely to meet what increase a machine tool significantly wear away, and be being told from craft also come true hard. Mechanical clearance brings about an axis / deviation exists between the measured value of the athletic path of main shaft and indirect measurement system. Once direction is changed,this is meant, the axis will move excessively long-distance or too nearly, this depends on the size of clearance. Workbench and coder also can be affected related its: If coder position is lead workbench, it reachs instruction place ahead of schedule this means the distance that the machine tool moves actually to shorten. Move in the machine tool, compensate a function through backlash is being used on corresponding axis, when inverting, the deviation that records previously will activation automatically, get on the deviation overlay that records before to real position value. Guide screw pitch error compensates what CNC controls the indirect measurement in the system to measure a principle to be based on a such hypothesis: Namely the pitch of ball guide screw keeps changeless inside effective journey, be in accordingly theoretic, can give the actual seat of linear axis according to the derivation of athletic message position of drive electric machinery. But, the production error of ball guide screw can be brought about measure a system to produce deviation (call guide screw pitch error) again. Measure deviation (depend on be used survey a system) with the mounting error that measures a system to go up in the machine tool (call again measure systematic error) may farther aggravate this problem. To compensate these two kinds of errors, the measurement that makes can use an independence system (laser is measured) the natural error curve that measures CNC machine tool, next, in wanting place to compensate a value to maintain existence CNC system, undertake compensating. Attrition is compensated (quadrantal error is compensated) with dynamic attrition compensation quadrantal error is compensated (call attrition to compensate again) suit afore-mentioned all situations, so that be in,treatment raises outline precision considerably when circular outline. The reason is as follows: In quadrantal changeover, an axis moves with highest feed speed, another axis criterion fall asleep. Accordingly, the different attrition behavior of two axes may cause outline error. Quadrantal error compensation can reduce this error effectively and ensure outstanding treatment effect. The density that compensates pulse is OK the diagnostic curve setting related basis and acceleration, and this feature curve can be changed with parameter certainly through circularity test. In circularity test, the deviation of the real position of circular outline and process designing radius (it is especially when inverting) the record that is quantified comes down, change through the graph show go up in man-machine interface. On the systematic software of new version, function of compositive dynamic attrition compensation can differ according to the machine tool the attrition behavior below rotate speed has dynamic compensation, reduce error of effective treatment outline, realize taller control precision. Sag and angle error compensation if the weight of single component can bring about each machine tool mobile component displacement and tilt, need to undertake sag is compensated, because it can cause share of relevant machine tool (include oriented system) flagging. Angle error compensation is used at be being done not have when mobile axis to be opposite each other with proper point of view neat when (for example, perpendicular) . As positional deflection increased ceaselessly at 0 o'clock, position error also increases. These two kinds of errors all by the machine tool self-prossessed, or cutting tool and workpiece weight place are brought about. The compensation value that measures when debug is pressed by ration hind plant with some according to corresponding position form, if compensate a watch, memory is in SINUMERIK. When the machine tool moves, the positional basis of relevant axis stores the compensation cost of the dot undertakes interpolation. To every time continuous method is mobile, all put in basic axis and compensation axis. Temperature compensates quantity of heat to may bring about a machine tool to expand partly each. Expand limits depends on rate of the temperature of part of each machine tool, heat conduction. Different temperature may bring about the real position of each axis to produce change, this meeting is right the workpiece precision in treatment produces negative effect. These real value change can pass temperature compensation to offset. Each axis all can be defined in the error curve of different temperature. Bilge to compensate heat correctly from beginning to end, must pass functional piece to control a system to deliver temperature to compensate value, referenced position and parameter of linear gradient horn afresh to CNC from PLC ceaselessly. The change of accident parameter can be eliminated automatically by control system, shun function of vivid monitoring of shunt excitation of machine tool overload thereby. Dimensional error compensates a system (the position of VCS) rotor, their mutual compensation and cutting tool are directional error, the likelihood is brought about turn error of geometry of occurrence systematization of head and component of circumgyrate first class. In addition, the oriented system of axis of the feed in every machine tool will appear small error. To linear axis, these errors are level of; of linear position error and; of perpendicular linearity error to turn to coming back axis, meeting generation pitch angle, yaw angle and roll horny error. Be opposite machine tool component each other neat when, the likelihood appears other error. For example, perpendicular error. In 3 axes machine tool, this means 21 may arise on point of a knife a geometrical error: 6 errors type multiplies every linear axis with 3 axes, add 3 angle error again. Joint action forms these deviation total error, call dimensional error again. The cutting tool midpoint that dimensional error described actual machine tool (the deviation of the position of cutting tool midpoint of TCP) position and machine tool of ideal free of error. SINUMERIK solution partner can laser of have the aid of measures equipment to decide dimensional error. The error that measures single position only is far insufficient, must measure the error of all machine tool inside whole treatment space. The measured value that needs to record all positions normally and draw becomes a curve, the seat that because each error size depends on,photograph coop gives an axis and measure the place. For example, when be in different position with Z axis when Y axis, the error that causes X axis generation will be different although —— also is met in the almost same position of X axis occurrence error. Motion of “CYCLE996 – of have the aid of measures ” , need a few minutes to be able to decide rotor error only. This is meant, can check the accuracy of the machine tool ceaselessly, if need, although aborning, OK also and corrective accuracy. Deviation is compensated (the make a present of before trends is controlled) the deviation of controller of the position when deviation shows in the machine tool the axis moves and standard. The difference of as real as its position is worth the target position that axial deviation is machine tool axis. Deviation causes the needless outline error related to speed, it is especially when outline curvature change, wait like circle, quadrate outline. By right of the NC in part program advanced language commands FFWON, when diameter of along the road is mobile, can decrease the deviation related to speed for 0. Control of the make a present of before passing raises method precision, achieve better treatment result thereby. FFWON: Pilot of the make a present of before starting commands FFWOF: Pilot of the make a present of before shutting commands the electron deserves to weigh compensation to be below extreme circumstance, pair of to prevent axial prolapse machine tools, cutting tool or workpiece cause damage, can activation the electron deserves to weigh a function. In matching heavy laden axis without machinery or hydraulic pressure, once loosen brake, vertical axis will be accident flagging. After activation electron deserves to weigh, the axis that can compensate an accident is flagging. After loose brake, rely on constant balance torque to hold the position of flagging axis. CNC Milling