1、 The machining accuracy of parts is poor
Generally, the feed dynamics between the shafts are not adjusted according to the error during installation and adjustment, or the transmission chain of each axis of the machine tool has changed (such as the change of lead screw clearance, pitch error, axial movement, etc.) due to wear and tear. It can be solved by readjusting and modifying the clearance compensation. When the dynamic tracking error is too large and an alarm is given, check whether the servo motor speed is too high; whether the position detection element is good; whether the position feedback cable connector is in good contact; whether the corresponding analog output latch and gain potentiometer are in good condition; whether the corresponding servo drive device is normal.
2、 When the machine tool is in motion, it causes poor machining accuracy
It may be that the acceleration and deceleration time is too short, so the speed change time can be appropriately prolonged; or the connection between the servo motor and the lead screw is loose or the rigidity is too poor, which can appropriately reduce the gain of the position ring.
3、 Roundness out of tolerance in two axes linkage
- Axial deformation of circle
This deformation may be caused by mechanical adjustment. If the positioning accuracy of the shaft is not good or the gap compensation of the lead screw is improper, the roundness error will be produced when the image limit is exceeded.
- Oblique ellipse error (ellipse in 45 degree direction)
At this time, the position deviation value of each axis should be checked first. If the deviation is too large, adjust the position loop gain to eliminate. Then check whether the interface board of rotary driver or inductosyn is adjusted properly, and then check whether the mechanical transmission pair clearance is too large and whether the gap compensation is appropriate.
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