Yamaha YP-X Series, Owner'S Manual

Page: 66 / 110

CHAPTER 5 Installation
5-8
3-3 Replacement of R axis motor (YP220BXR, YP320XR, YP340X)
The R-axis motor on the YP220BXR, YP320XR, YP340X is a built-in structure
and basically comprised of a stator and rotor.
1) Turn off the controller power.
2) Remove the cover on which a R-axis whip-over cable is attached, and dis-
connect the motor power cable and signal cable connectors.
3) Remove the four M4 bolts securing the stator, and extract the stator upwards.
4) Remove the plate securing the rotor to the motor shaft. The plate is fastened
with four M2.6 bolts.
5) Extract the rotor upwards, and replace with a new rotor.
6) Install the rotor and stator in the opposite order that the old parts were re-
moved. Tighten the bolts alternately at the diagonal positions.
7) Reattach the motor connectors and reinstall the cover.
8) Set the origin position again by absolute reset.
9) Affix the alignment mark seals.
10) Make corrections if any of the point data has deviated.
whip-over cable
Stator
R-axis
Rotor plate
M2.6 bolt
Fig.5-3 motor replacement