QL datasheet(17/21 Pages) PANASONIC

17 / 21 page

Explanation

Improved design

Poor design

IMPROVEMENT EXAMPLES

Problem • Dog adjustment is difficult.

Solution • Separate each one until the dog

can be adjusted.

Problem • The dog axis is too long, and slips

out during operation.

• For this reason, the limit switch

operating position slips.

Solution • Firmly fix the dog plate to the base.

Problem • The detector sinks, applying force

to the limit switch.

• The limit switch O.T. cannot be set.

Solution • Relieve the pressure using an

additional actuator, and the O.T.

can also be set.

Problem • The area around the actuator coil

is easily damaged.

• Friction generated during opera-

tion.

Solution • Relieve the friction by installing an

additional actuator.

• Change the type of limit switch.

Problem • Workers keep bumping the actua-

tor.

Solution • Fit a protective cover to the side of

the limit switch.

Problem

• 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.

Solution

• Fix the limit switch position on the

stationary board.

• Fit a protective cover, so that water

and oil cannot come into direct con-

tact with the limit switch.

Problem • The cord is not fixed, and gets

pulled during work.

• Dog adjustment is ineffective.

Solution • Change the limit switch position,

and fix the cord.

• Attach an adjustment mechanism

to the dog.

Problem • The limit switch is near a high-tem-

perature area.

• Dog adjustment is ineffective, and

the dog keeps bumping the lever.

Solution • Move the limit switch further away.

• Make dog adjustment possible,

and change the shape of the unit.

Dog axle

Conveyer

Printer

Detector

Conveyer

Detector

Rotation axle

Limit

Protective cover

High temperature

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