4OM-1345-009_w.pdf - 第221页
5-4 AKHEMT -ID 0605-001 (2) Machine-Based Factors When a component has no problem, check the main body of the machine. A failure can be tracked by checking if it occurs on a speci fi c vacuum nozzle or feeder slot No. (la…
5-3
AKHEMT-ID
0605-001
2. Troubleshooting on Pickup Errors
2.1 Cause and Remedy of Pickup Errors
(1) Component-Based Factors
When the cause of a failure lies in specifi c components or lots, the
components must be examined fi rst of all.
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.
(1-5) The fl atness of the cavity bottom is defective.
(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
1005 types because such components are directly affected by how they
are 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.
The specifi cations of taping are specifi ed in "JIS-C0806". However, as
the 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.
Fig. 4E2 Exemplifi cation of Troubled Taped Components
2. Troubleshooting on Pickup Errors
5-4
AKHEMT-ID
0605-001
(2) Machine-Based Factors
When a component has no problem, check the main body of the
machine.
A
failure can be tracked by checking if it occurs on a specifi c vacuum
nozzle or feeder slot No. (lane).
(2-1) When a failure occurs on a specifi c vacuum nozzle, check
the following items concerning the pertinent vacuum
nozzle.
•
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 used, the vacuum nozzles and their fi lters get dirty easily.
Therefore, it becomes important to clean the vacuum nozzles and fi lters
periodically.
Reference
Refer to "2.2 (1) Frequent Pickup Errors on Specifi c Vacuum Nozzle" for the
troubleshooting.
(2-2) When a failure occurs on a specifi c feeder slot No. (tape
feeder), check the following items concerning the pertinent
feeder slot No. (tape feeder).
(1) Check if the tape feeder is loaded correctly with components.
(2) Check if the top cover tape is peeled off normally.
(3) Check if the data related to the component picks is normal.
Reference
Refer to "2.2 (2) Frequent Pickup Errors on Specifi c Feeder Slot No." for the
troubleshooting.
2.1 Cause and Remedy of Pickup Errors
5-5
AKHEMT-ID
0605-001
2.2 Symptom-Based Troubleshooting
(1) Frequent Pickup Errors on Specifi c Vacuum Nozzle
Dirty Vacuum
Nozzle
Frequent Pick-Up Errors
on Specific Nozzle
Operation Check
Cleaning
NG
Cleaning
Replacement
Cleaning
OK
NG
NG
NG
NG
OK
OK
OK
OK
Clogged Hole of
Vacuum Nozzle
NG
Nicks on Linear Measure
Sensor
Replacement
Dirty Linear Measure
Sensor
Replacement
Note (b)
Dirty and Clogged
Vacuum Filter
Movement of Vacuum
ON/OFF Valve
OK
Fig. 4E3
Note
(a) Refer to "Chapter 1 Maintenance" for the cleaning and replacement
procedures.
(b) Check the vacuum ON/OFF switching in the "Output Chk" tab sheet
in the "I/O DIAG" window. (Operation Sequence: [MAINT] Button
→
[DVC CHK] Button
→
"Output Chk" Tab)
2.2 Symptom-Based Troubleshooting