Limit Switch Trouble Shooting

1. Dog Type
Poor design
  • Dog adjustment is difficult.
Improved design
  • Separate each one until the dog can be adjusted.
2. Dog Length
Poor design
  • The dog axis is too long, and slips out during operation.
  • For this reason, the limit switch operating position slips.
Improved design
  • Firmly fix the dog plate to the base.
3. actuator
Poor design
  • The detector sinks, applying force to the limit switch.
  • The limit switch O.T.cannot be set.
Improved design
  • Relieve the pressure using an additional actuator, and the O.T.can also be set.
4. Actuator
Poor design
  • The area around the actuator coil is easily damaged.
  • Friction generated during operation.
Improved design
  • Relieve the friction by installing an additional actuator.
  • Change the type of limit switch.
5. Workers
Poor design
  • Workers keep bumping the actuator.
Improved design
  • Fit a protective cover to the side of the limit switch.
6. protective water
Poor design
  • Because the cord vent for the limit switch faces upwards, water droplets and so forth can easily penetrate the interior.
  • The cord is constantly moving and thus easily damaged.
Improved design
  • Fix the limit switch position on the stationary board.
  • Fit a protective cover, so that water and oil cannot come into direct contact with the limit switch.
7. Cable Moving
Poor design
  • The cord is not fixed, and gets pulled during work.
  • Dog adjustment is ineffective.
Improved design
  • Change the limit switch position, and fix the cord.
  • Attach an adjustment mechanism to the dog.
8. Temperature area
Poor design
  • The limit switch is near a high-temperature area.
  • Dog adjustment is ineffective, and the dog keeps bumping the lever.
Improved design
  • Move the limit switch further away.
  • Make dog adjustment possible, and change the shape of the unit.
9. Dumper Poor design
Poor design
    The detector is scratched.
  • Limit attachment adjustments are difficult
  • The actuator is damaged.
  • Specimen transfer is impeded.
Improved design
  • Fix the limit position to behind the dumper
    to solve the above problems.
10. Rotation Axle
Poor design
  • The transfer path of the detector is not fixed, and it keeps bumping the actuator.
  • The operating position is unstable.
  • The actuator is damaged.
Improved design
  • Stabilize the operating position by fitting an additional actuator.
  • Make limit switch adjustment possible.
11. Dog
Poor design
  • Stroke adjustment ineffective.
  • Release the limit switch position, and ensure that the dog does not bump the lever.
Improved design
  • Make dog adjustment possible.
  • Change the limit switch position, and sure that the dog does not bump the lever.
12. Cam shape
Poor design
  • The cam shape is unsuitable
    (especially during release and strike release.)
  • Direction of limit switch attachment is unsuitable.
Improved design
  • Render the cam shape smooth.
  • Change the limit switch position.