SMC Networks D-M9 J Series Operation Manual page 17

Trouble
Trouble
No.
The operation is
unstable.
(chattering)
6
The Auto switch
operates at
multiple points.
The load does
not work.
Investigation to find possible
Possible cause
Improper setting
Detection close to the limit of
(mounting)
Auto switch operating angle
position
Looseness of the Auto switch
Displacement
unit or Auto switch mounting
from set position
screw
Condition of connected part
Incorrect wiring (connector contact pin and
crimping terminal)
The presence of repeated
bending stress to a part of lead
Breakage of
wire
lead wire
(bending radius, tensile force to
the lead wire)
The presence of a magnetic field
source near the actuator
Malfunction due
(actuator, electric welding
to magnetic field
machine conductor, motor,
magnet etc.)
Malfunction due The effect of a magnetic field
to magnetic field generated by adjacent actuator
Satisfaction of the following
relations by the actuator rotation
Operating angle
speed
range detection
Load operating time [s] < Auto
at intermediate
switch operating angle range
position
[mm]/Actuation operating speed
[mm/s]
-16-
cause
Move the Auto switch to proper
position (near the center of the
Auto switch operating angle).
Fix to proper position at the
appropriate torque.
Correct wiring. (Perform wiring of
connected part again.)
Correct wiring.
(Adjust tensile force and enlarge
bending radius.)
Place a magnetic shield plate
between magnetic field source
and the actuator, or separate
magnetic field source from the
actuator.
Mounting bracket, bolt, mounting
frame, and tools are changed to
non-magnetic materials.
Place a magnetic shield plate to
the actuator.
Decrease the actuating speed
until specifications can be
satisfied.
Countermeasure
No.D-※S-OMS0002-B