Initial Situation and Reported Fault.
The Yaskawa AC Servo Motor SGMPH-02A1A-YR31 was sent in with the fault description that the integrated holding brake opens correctly when energized, but no longer closes reliably during operation. This behavior...
A practical case involving misdiagnosis, prior repairs and system-level damage.
Initial condition on arrival
The Mitsubishi Power Supply Unit MDS-C1-CV-75 was received with Alarm F active.The unit was able to power up, but the startup sequen...
The Mitsubishi MDS-B-V1-35 AC Servo Drive Unit was sent to us due to unstable machine behavior. The customer reported strong vibrations starting at approximately 700 revolutions per minute, which increased further with rising speed. After a short oper...
Initial situation and fault description.
The Mitsubishi AC Servo Motor HG-KR43J was sent to us with a recurring and reproducible fault condition. During operation in combination with a MR-J4-40B Mitsubishi Servo Drive Unit, the following alarm occu...
Initial situation and fault description from the customer.
The Mitsubishi Servo Drive Unit MDS-B-V24-3535 was sent to us with the clear fault description that alarm 32 was permanently displayed on the front panel. For MDS-B servo drives, this alarm...
Initial Situation and Customer Complaint,
The YASNAC CPS-18FB power supply was sent to our workshop with an unusual and at first glance difficult to interpret fault description. The customer reported that the CNC system showed no reaction when swit...
Initial Situation and Fault Description.
This repair case concerns a Yaskawa SGD-02AN servopack used in an industrial CNC application.The unit could still be powered on at the customer site, showed no classic power-related faults and no immediate o...
Initial Situation and Customer Symptoms.
On the customer’s machine, axis 20 exhibited noticeable vibrations that occurred only at specific speeds.Outside these speed ranges, the axis appeared to run smoothly. No typical servo alarms were generate...
The unit arrived with a field description that is often underestimated. The customer stated that the FANUC servo had no active alarm, but the connected motor sometimes produced strange noises, humming, and occasional light vibration. From an operator ...
Initial situation and fault pattern in the CNC machine.
The Okuma drive unit MIV04-1-B3 with part number 1006-2214 was sent in by the customer with the report that unstable axis movements and recurring alarms occurred during operation. The unit was...