When numerical control machine tools carry out batch processing of precision mechanical parts, special attention should be paid to the precision of processing, and we must ensure that the accuracy of the batch processing we have to pay attention to what issues?
First, the accuracy of batch parts processing is poor, generally due to installation adjustment, the feed dynamics between the axes did not adjust according to the error, or because the use of wear and tear, the machine tool shaft drive chain has changed. It can be solved by re-adjusting and modifying the gap compensation amount.
When the dynamic tracking error is too large and the alarm occurs, check if the servo motor speed is too high. The position detection element is good. Position feedback cable connector is in good contact. Corresponding analog output latches and gain potentiometers are good. The corresponding servo drive is normal.
Second, the over-tuning machine tool movement caused by poor processing accuracy, may be too short acceleration and deceleration time can be appropriate to extend the speed change time. It may also be that the connection between the servo motor and the screw is loose or the rigidity is poor, and the gain of the position loop may be appropriately reduced.
Third, the roundness of two-axis linkage when the excess
(1) Axial deformation of a circle
This deformation may be caused by the lack of mechanical adjustment. The positioning accuracy of the shaft is not good, or the misalignment of the screw clearance may cause roundness error when crossing the quadrant.
(2) Oblique ellipse error
In this case, first check the position deviation of each axis. If the deviation is too large, adjust the position loop gain to eliminate it. Then check whether the interface board of the resolver or induction synchronizer is adjusted properly, and then check whether the mechanical transmission backlash is too large and whether the backlash compensation is appropriate