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4OM-1840 5-1-3 1604-001 2. T roubleshooting on Pickup Errors 2.1 Cause and Remedy of Pickup Errors (1) Component-Based Factors …
4OM-1840
5-1-21604-001
Classication of
Failures
Contents of
Failures
Symptom of Failures
Failure before
Component
Placement
Component Pickup
Error
Components cannot be picked up.
Components are turned vertically.
A recognition error occurs.
Components fall down.
Others
Failure after
Component
Placement
Component
Placement Error
The positional and angular deviation of
component occurs.
Components are turned over and placed.
Some components are missing.
Some components are cracked or nicked.
Others
T4E1
1.2 Helpful Hints on Countermeasures against Failure
•
what kind of symptom is produced and how frequently the symptom appears.
•
The second helpful hint is to grasp the tendency (environment and condition) of
a failure.
Shown below are the concrete items to be checked.
(4) Check if the failure occurs at a limited stage.
•
inspection process. In such a case, it is required to track the failure by checking
all processes and specify the process in which the failure has occurred.
It is very important to grasp a failure symptom precisely on these helpful hints.
Precise capture of a failure symptom makes it possible to track the factor and
make a plan to take countermeasures against the failure.
In the case that the present status is not grasped correctly, the countermeasure
In particular, for the errors with low occurrence rate, it is required to collect the
data accurately, estimate the factors based on the data collection results, and
take the countermeasure.
1.1 Classication of Failure Symptoms
4OM-1840
5-1-31604-001
2. Troubleshooting on Pickup Errors
2.1 Cause and Remedy of Pickup Errors
(1) Component-Based Factors
Shown below are the cases of failures whose factors lie in components.
[Factors of Pickup Errors on Component Side]
(1-1) A component adheres to the bottom tape.
(1-2) The shape of a cavity is defective.
(1-3) The shape of a component is defective.
(1-4) A component turns sideways because the tape cavity is too large.
(1-6) Oil or mold lubricant adheres to the bottom of a component.
The failures described in (1-1) through (1-4) have a tendency to occur easily
due to the components packaged in a paper tape and the failures described in
(1-4) through (1-6) due to the components packaged in an embossed tape.
Special caution should be paid to minute components such as 0603 and
packaged in the tape.
To determine whether or not the taped components are packaged in good
condition, turn the tape upside down and check to see how the components
fall down from the cavities. If the components fall down freely, it means that
they were packaged in good condition.
detailed regulations are not provided as for the failures described in (1-1)
through (1-6), it is required to ask the component maker about the details
when the components are purchased.
Exemplication of Troubled Taped Components F4E2
2. Troubleshooting on Pickup Errors
4OM-1840
5-1-41604-001
(2) Machine-Based Factors
When a component has no problem, check the main body of the machine.
or feeder slot No. (lane).
(2-1) When the vacuum nozzle has been specied :
•
Check if the vacuum nozzle is abnormal.
•
Check if the vacuum line is abnormal.
•
Check if the vacuum ON/OFF valve is abnormal.
•
Check if the linear measure sensor is abnormal.
When a factory is dusty or a lot of components packaged in paper tapes are
periodically.
Reference
"Chapter 5" for the troubleshooting.
(2-2) When the feeder slot No. has been specied :
•
Check if the tape feeder is loaded correctly with components.
•
•
Check if the data related to the component picks is normal.
Reference
"Chapter 5" for the troubleshooting.
2.1 Cause and Remedy of Pickup Errors