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CNC machine tool mechanical parts: X-axis fault repair
Source: Bearing network time: 2018-04-06
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X-axis gap is too big fault repair problem: a matching FANUCOMC; model XH754 CNC machine tool; X-axis gap is too large.
Anatomy and disposal process: X-axis clearance consists of coupling clearance, bearing clearance, screw clearance, mechanical elastic clearance, etc. Remove the X-axis guard; power off and shut down; grasp the screw by hand; turn back and forth; feel the free corner Larger; there is a large gap, adjust the X-axis screw bearing clearance; tighten the nut to tighten it and no improvement; therefore doubt the screw nut has a problem. Loosen the screw nut and the table; view; no gaps found , then open the bearing seat flange; look at the screw bearing; found that the two-corner touch bearing (back to back) inner ring has been tightened together; under normal circumstances there should be a gap; clarify that the bearing gap has no adjustment.
According to the outer diameter of the bearing; a small ring of a thickness of 1 mm is placed at the center of the outer diameter of the pair of bearings; the original gap is subtracted; thus the inner ring of the pair has a gap of about 0.8 mm to adjust the allowance. The back nut is properly tightened; the parameter 0535 is set to 0; the X-axis gap is 0. 02mm measured by the dial gauge; the parameter 0535 is set to 15; the X-axis gap is 0. 01mm; the X-axis gap is eliminated.
X-axis encoder alarm fault repair problem: a matching FANUCOMC; model XH754 CNC machine tool; processing 319 alarm.
Anatomy and disposal process: check the repair manual; prompt the pathogen due to the abnormal communication error of the X-axis pulse encoder; check the diagnosis number 760; find its multi-directional position; the repair manual indicates that the pulse encoder is bad or the reaction cable is bad. The encoder cable plug M185 is normal; therefore, it is a problem that the X-axis serial encoder has a problem. It is recognized; in the electric cabinet, the M184 and M194, M185 and M195 and the corresponding motor three-phase drive line are communicated; the fault alarm is changed to 339. The hair lesion is the Z axis; the X-axis encoder is proved to be defective. After replacement; the disease is removed.
Over-the-counter alarm fault repair phenomenon: a matching FANUCOMC; model XH754 CNC machine tool; over-time alarm "OVERTRAVEL-X" occurs when the X-axis returns to zero.
Anatomy and Disposal Process: Check that the X-axis alarm is far from the stroke limit; the X coordinate of the display appears to exceed the X-axis scale; therefore, it is recognized as a soft limit overtravel alarm. Check parameter 0704 is normal; power off; Press the P button to turn on the NC power supply; if the system finishes the zero return without checking the software limit, you can also change the 0704 to -99999999 and then return to zero; if there is no problem; then change it back to the original value. , you can also press P and CAN to power on to eliminate the alarm.
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