When “E” Does Not Simply Mean “End”.
The Mitsubishi Power Supply MDS-C1-CV-370 arrived at our facility with a very typical yet at the same time tricky fault description. The customer reported that immediately after power-up, an “E” alar...
The Mitsubishi Servo Drive Unit MDS-C1-V2-2020 was delivered to us due to a sporadically occurring Alarm 32. The customer reported that the machine stops irregularly, the alarm behavior cannot be reproduced reliably and in some cases disappears after ...
Initial Situation
An Okuma Power Supply MPS20 (1006-2201) arrived at our workshop with a clear but technically challenging fault description from the customer:Alarm 04 Commercial power source error / Main circuit power source error.
The fault d...
Initial situation and fault description.
The Yaskawa AC Servo Motor SGMAH-01A1A2S was sent to us with an encoder fault. According to the customer, the machining center stopped suddenly during operation. There were no warning signs or gradual perfor...
Initial situation and fault description.
The FANUC A06B-6079-H206 Servo Amplifier Module was delivered to us with a clear and critical fault condition. Immediately after power-up, the 7-segment display showed a permanent alarm “9”. The alarm co...
Initial situation and failure description.
The Mitsubishi Spindle Drive Unit MDS-D-SP-40 was sent to us with no function. According to the customer, the machine suddenly shut down during an active machining process. There was no long-term warning, ...
The 4015P-B or 32-4015P-B HAAS Servo Amplifier arrived with the clear fault description “no function”. In practice, this usually means an immediate production stop for the operator: the axis cannot be enabled, the machine remains in alarm state, o...
Initial Situation and Background.
The two Yaskawa AC servo motors SGMAH-04AAA21 and SGMAH-04AAA61D-OY equipped with the TRD-FWAG13 encoder were deliberately ordered from us as fully overhauled exchange motors by a machine manufacturer. Not because ...
Initial situation and fault symptoms.
The Mitsubishi MDS-C1-V2-0303 Servo Drive Unit was sent to us together with a Mitsubishi HA33NC-TS AC Servo Motor. The customer was unsure whether the fault originated from the drive or from the motor and there...
Initial situation and fault description.
The Mitsubishi MDS-C1-V2-1005 Servo Drive Unit was sent to us with a fault that was initially difficult to pinpoint. According to the customer, the alarm Al. 32 (Power Module Overcurrent) appeared only very ...