Introduction: Compare with photograph of general accuracy machine tool, numerical control machine tool has a spare parts to machine precision not only quality of tall, product stabilizes efficiency of tall, production the characteristic with automation extremely high rate, and the spare parts treatment of the complex curved surface that it still can finish general accuracy machine tool hard or can machine far from, consequently numerical control machine appears in the position in mechanical manufacturing industry more and more it is important to be. When the treatment precision of spare parts of numerical control machine tool is poor, answer to analyse and be solved from face of the following tripartite. (1) the treatment precision of the spare parts is poor, because installation is adjusted,be commonly when, the feed trends between each axis does not have mix up according to the error, or after because use,wearing away, catenary of each axis drive had the machine tool to change (change like guide screw clearance, pitch error, axial change is moved etc) . Can be solved through readjust and modification clearance compensation. Pass when dynamic tracking error big and when calling the police, can check: Servo electromotor rotate speed is exorbitant; Positional detecting element is nice; Positional feedback cable receives plug-in unit to whether be contacted good; Potentiometer of Suo Cunqi of corresponding imitate capacity output, gain is good; Corresponding servo actuating device is normal. (2) tone exceeds to cause treatment when the machine tool moves precision is bad, the likelihood is to add, slowdown time is too short, can extend rate change time appropriately; Also may be the join between servo electromotor and guide screw become loose or tigidity is too poor, can reduce the gain of positional annulus appropriately. (3) the A of of of of circularity out of tolerance when two axes linkage. Round axial is out of shape is out of shape the likelihood is machinery did not adjust those who cause good this kind. Fixed position precision of the axis is bad, or it is guide screw clearance compensation is undeserved, can have caused error of circularity of the generation when quadrant. B.
Inclined elliptical error (the ellipse on 45 degrees of direction) the positional deviation cost that should examine each axis above all at this moment. If error is too big, can adjust positional annulus gain to eliminate. Check next rotate the interface of transformer or inductive synchronized board whether mix up, deputy clearance of reexamination machinery drive whether too big, clearance compensation is appropriate. CNC Milling