Initial Situation and Observed Fault.
A Yaskawa SGDH-20AE AC Servopack was received for repair due to intermittent shutdowns during machine operation. The customer reported that the servo drive stopped randomly and then restarted after resetting th...
Initial situation and fault description.
The Yaskawa AC Servo Motor SGMPH-15A1A6D was delivered from a machine tool after the axis of the machine could no longer be enabled. When the servo drive was switched on, the alarm Al.84 appeared immediately...
Initial situation and fault pattern.
A Mitsubishi spindle drive unit type MDS-DH-SP-200 arrived in the workshop with an intermittent fault. In the machine, the front display showed code 3D, but only after a certain machining time. The display alter...
Two Yaskawa servopacks SGDF-B5CS arrived at our workshop almost at the same time. The fault description was strikingly similar. During operation and in some cases also in the real machine, the units suddenly turned off. Not with a clean, reproducible ...
Initial situation and fault pattern.
A FANUC AC Servo Amplifier module A06B-6096-H301 was delivered. According to the fault description, the drive could be switched on, but axis motion was not possible. After switching on, the code “b.” appeare...
Initial situation and fault pattern.
The Yaskawa AC servo motor SGMGH-13ACA6C arrived at the workshop with poor insulation condition and a regularly occurring encoder fault. In the machine, the axis repeatedly aborted during machining. This typical...
Initial situation and fault description
A Yaskawa Servopack CACR-SR30SB1BFY100 was sent in for repair. The unit belongs to the proven CACR-SR series, often referred to as VS-800, and is typically used in older CNC machines. The SR30 power class cor...
Initial situation and fault symptoms.
The Mitsubishi Servo Drive Unit MDS-C1-V2-7045 arrived at the workshop as a unit that had already been repaired previously. According to the customer information, a power module had already been replaced before...
Initial situation and symptom description
A Yaskawa AC servo motor SGMP-15AWYR12 with an integrated holding brake arrived from a system in which the axis could no longer be held safely at standstill. After switching off the servo enable, the load d...
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