Yamaha SIGMA-G5SII Service Information page 152

(7) Loosen the slip ring set screws and perform the centering adjustment.
① Press the 1/100 dial gauge against the coupling section and turn it slowly to confirm
the eccentricity.
* Eccentricity: 0.1mm or less (The staged section of the coupling is not measured).
In the case of an eccentricity of 0.1mm or more, the slip ring attachment position,
wiring caught in the coupling or coupling fastening procedure is reviewed.
② Tighten the slip ring set screw at the position where the eccentricity is within the
specified range.
(8) Connect the slip ring and the connector.
* Make sure that the connectors have been
connected securely.
Service Information
Fig.D61
SI1705004E-00=SIGMA-G5SII Service Manual
152/273
For Service Engineer
Position where the
dial gauge is pressed
Fig.D62