Technical Case Report Based on Sigma-V Alarm Structure.
A Yaskawa SGDV-260D11A servo drive from the Sigma-V series was submitted with the customer complaint that the connected motor suddenly stopped rotating and the front display remained completel...
Overheated internal power supply with damaged PCB traces due to component drift.
The Yaskawa Juspeed-F CIMR-22AS arrived at our workshop with the customer complaint that the drive was no longer regulating correctly and there was a noticeable burnin...
When Production Suddenly Stops.
Everything was running smoothly.The machining process was stable, cutting conditions were normal, and nothing indicated an upcoming issue.
Then, without warning, the machine stopped.
The cause was quickly ident...
Initial Situation and Symptoms.
The motor arrived as a typical emergency case: insulation fault, intermittent drive shutdowns, and the characteristic smell of moisture inside an electrical machine.
The root cause became immediately visible:T...
A company from the automotive industry contacted us due to an acute production downtime. The affected CNC machine was running in 24-hour operation and was completely blocked. Installed was a Mitsubishi MDS-C1-SPX-220 spindle drive with 22 kW power in ...
In this repair case, we were dealing with a 320 Volt DC bus power supply type 93-69-2000C from a HAAS TL-1. The machine intermittently reported the error “A/C Phase Fault.” At first glance, this suggested a classic phase failure.
On site, thoro...
The motor was delivered with recurring encoder alarms A.70 and A.73 on the SGDH drive. Additionally, insulation measurements were unstable and sometimes below specification.
During initial inspection, coolant contamination was clearly visible at th...
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...