Initial situation and fault pattern
In this repair case, a Yaskawa AC Spindle Motor UAASKB-11LYA11 with encoder UTMSI-10AAGAZA was delivered to our workshop. According to the customer, problems had occurred in the spindle drive. In addition, it was...
Initial Situation and Fault Pattern.
A sporadic alarm A.b1 occurred on an older CNC milling machine. The fault was irregular and therefore particularly critical from a diagnostic perspective. At first, a cable problem in the drag chain was suspecte...
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Initial situation and fault pattern.
The AC servo motor SGMP-02AWYR12 arrived from a Yaskawa robot in which the holding brake operates very frequently. The operator noticed that the axis no longer holds cleanly and motion became unstable. Shortly a...
Initial situation and fault pattern.
A Mitsubishi MR-S12-80B-Z33 servo drive from a 2 axis application with L axis and M axis was delivered. The fault occurred reproducibly directly on enable. As soon as Servo ON was commanded, alarm A.17 appeared ...
Initial situation and fault symptom.
A Mitsubishi Servo Drive Unit MDS-DH2-V2-8080 from a CNC drive environment was delivered. During the functional test, the unit showed no expected response. The front LED display appeared frozen, without a plausi...
Initial situation and fault symptoms
The examined servo motor is a Yaskawa AC servo motor from the SGMM series with the model designation SGMM-B5SF13. A position feedback device type UTOPI-20ANS encoder is installed in this motor. The motor operate...
Initial situation and fault symptoms.
The servo drive Sanmei QT-002AXE-ST was received in the workshop from a CNC Swiss-type lathe machine. These drives are frequently used in Star machines and control feed axes or auxiliary functions.
The opera...
Initial Situation and Fault Description.
In a machine tool the spindle suddenly stopped during machining. The spindle drive shut down without prior warning. After a short waiting period the machine could be restarted, but after a few minutes of mac...
Initial situation and fault picture.
The Okuma Driver Unit MIV06DB-1-B5 (Okuma part number 1006-2265) came from a CNC system with error number 13, which was permanently active. The fault could neither be cleared by reset nor by switching on again. ...