Omron CS1W-MC221 -, Operation Manual

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Troubleshooting Tables Section 12-1
31 The origin
established by the
origin search
sometimes
changes. There is some looseness in
couplings or other mechanical
connections. Check whether there is any
deviation from the markings at
the couplings between the motor
and axes, or at any other
connections. Tighten up the
connections.
32 There is no phase-Z margin. Monitor the phase-Z margin. If
the value is near the
Servomotor’s encoder
resolution x the ratio (1, 2, or 4),
or near zero, a deviation of one
motor revolution may occur at
the time of the origin search due
to even a minute change in the
timing of sensor inputs. Remove the motor
coupling and adjust it by
about a 1/4 turn, so that
the phase-Z margin
pulses will be about 1/2
of the Servomotor’s
encoder resolution x the
ratio (1, 2, or 4), and then
try executing the origin
search again.
33 Motor rotation is
unstable. The parameters are set
incorrectly. Check the MC Unit parameters
with the CX-Motion. Set the parameters
correctly, transfer them to
the MC Unit, and write
them to flash memory.
34 The Servo Motor power lines
and encoder lines are wired
incorrectly. Check the Servo Motor power
lines and encoder lines. Correct the wiring.
35 The speed reference
(XOUT/YOUT) polarity is
wrong. Check the speed reference
wiring. Correct the wiring.
36 There is eccentricity in the
couplings connecting the
Servomotor axis and the
mechanical system. There
may be loose screws or load
torque fluctuation due to the
meshing of pulley gears. Check the machinery. Try turning
the motor with no load (i.e., with
the machinery removed from the
coupling). Adjust the machinery.
37 The gain adjustment is insuffi-
cient. --- Execute Servomotor
autotuning.
Manually adjust the
Servomotor gain.
Adjust the servo
parameters with either
the CX-Motion or the
Teaching Box.
38 The wrong Servomotor is
selected (so it cannot be
adjusted). Check the torque and inertia
ratings and select another
Servomotor. Change to a suitable
Servomotor.
39 The Servomotor bearings are
damaged. Turn OFF the Servo Driver
power. If the Servomotor has a
brake, turn ON the brake power
supply and release the brake,
and then manually turn the
motor’s output axis with the
motor’s power line disconnected
(because the dynamic brake
may be applied). Replace the Servomotor.
40 The Servomotor windings are
disconnected. With a tester, check resistance
between the Servomotor’s U, V,
and W power lines. There should
be a proper balance between the
line resistances. Replace the Servomotor.
No. Problem Probable causes Items to check Remedy