Ac Voltage Is Too High Or Too Low - Robin America RGX7100 Service Manual

2) Cleaning Slip rings
The slip ring surfaces must be uniformly
bright . Slip rings showing black spots,
excessive wear, or uneven wear must be
repaired . A stained slip ring lowers generator
efficiency and output voltage . Polish the
slip rings with fine sandpaper while turning
the rotor until rough spots disappear . Care
should be taken not to touch the rotor coils
with the sandpaper .
8-2.AC.VOLTAGE.IS.TOO.HIGH.OR.TOO.LOW
8-2-1.CHECKING.ENGINE.SPEED
If the engine speed is too high or too low,
adjust it to the rated r .p .m .
[How.to.adjust.engine.r.p.m.]
* Loosen the lock nut on the adjusting screw .
* Turn the adjusting screw clockwise to
decrease engine speed or counterclockwise
to increase engine speed .
Normal.engine.speed.at.no.load.:.
3050 to 3250 rpm for 50Hz type
3650 to 3850 rpm for 60Hz type
8-2-2.CHECKING.STATOR
Check stator referring to Step 8-1-1 .
8-2-3.CHECKING.ROTOR
Check rotor referring to Step 8-1-2 .
SLIP RING
LOW SPEED
- 50 -
ROTOR
SANDPAPER
HIGH SPEED
ADJUST SCREW