Micron Maintenance Manual - 第12页
1 PREVENTIVE MAINTENANCE 1.5 MONTHLY MAINTENANCE 12 MAINTENANCE MANUAL MICRON 11/2017 1.4.3 Accuracy Check The accuracy check should be performed after doing 10 cycles unmeasured, allowing the machine to settle. Month 1 …
1 PREVENTIVE MAINTENANCE
1.4 MAINTENANCE PLAN
MAINTENANCE MANUAL MICRON 11/2017 11
1.4.1 Module 1
The first module comprises the following elements:
●
SPC Alignment Check - used to set a benchmark each month, the hardware is checked to
give a snapshot of the machine condition; performance is monitored to predict failure before it
has an effect on production.
●
Machine Cycle Count - machine usage is logged in the table.
●
A Software Check is carried out; if a newer version is available this may contain known defect
fixes or equipment enhancements. The service engineer can recommend an upgrade for the
equipment in service. In addition, the machine event log is checked to identify any re-occur-
ring errors which if not inspected/diagnosed may lead to unplanned downtime.
●
A standard Monthly Maintenance Check consists of a series of maintenance tasks which are
performed every month.
NOTE
SPC Alignment is included in the QC Calc Software package which is an optional measurement
tool.
1.4.2 Module 2
The second module comprises of the Monthly Hardware Check, where one or more hardware mod-
ules are scheduled for maintenance. Month 1 and Month 7 do not have a hardware check as a 100
cycle accuracy check is required. Over a twelve month period all machine modules are checked
and serviced at least once.
NOTE
Some of the hardware checks relate to options that may not be fitted to your machine.
1 PREVENTIVE MAINTENANCE
1.5 MONTHLY MAINTENANCE
12 MAINTENANCE MANUAL MICRON 11/2017
1.4.3 Accuracy Check
The accuracy check should be performed after doing 10 cycles unmeasured, allowing the machine
to settle. Month 1 and Month 7 are 100 cycles; all other months are 30 cycles as shown in the table
below.
Pre and Post print measurements are taken to record the accuracy of the alignment in CPK values
and the front and rear squeegee pressures.
Month No Of Cycles
Pre X Pre Y Pre
Theta
Post X Post Y Post
Theta
Front
Squeegee
Rear
Squeegee
1 100 100 100 100 100 100 100 100
2 30 30 30 30 30 30 30 30
3 30 30 30 30 30 30 30 30
4 30 30 30 30 30 30 30 30
5 30 30 30 30 30 30 30 30
6 30 30 30 30 30 30 30 30
7 100 100 100 100 100 100 100 100
8 30 30 30 30 30 30 30 30
9 30 30 30 30 30 30 30 30
10 30 30 30 30 30 30 30 30
11 30 30 30 30 30 30 30 30
12 30 30 30 30 30 30 30 30
1.4.4 SPC Results
Where the QC Calc for Windows program is installed, SPC data capture can graphically show crit-
ical alignment and squeegee pressure accuracy. The graphs in their visual form are often useful in
determining the optimum maintenance plan.
NOTE
Customers may opt to use the collected data in their own management system, ASM cannot
provide support for this.
1.4.4.1 Examining The Collected Data
In addition to examining the SPC data which is displayed graphically in the QC Calc for Windows
program, engineers can extract information about machine performance from other sources.
The SPC data collected on the machine is stored in E:\config\readings.dek. Information can be
displayed in a text editor and specific data can be examined eg, events between dates or a specific
word or phrase.
Each occurrence of an error for example, can be examined to see if the rate at which it has oc-
curred has increased (is it a random occurrence or an increasing trend?).
1.4.4.2 Authorization
At the end of each monthly task a Summary/Remarks form is provided to allow the engineer to
make comments or express observations. The engineer must sign off and date the form, if used, in
the 1.1.1 "Monthly Maintenance Completed" [}7] table so that there is a record that the schedule
has been completed.
1.5 MONTHLY MAINTENANCE
Each month the following tables are filled in prior to carrying out any equipment checks. Prior to
running the thirty test cycles required for the table below, run ten cycles to allow the machine to
settle.
1 PREVENTIVE MAINTENANCE
1.5 MONTHLY MAINTENANCE
MAINTENANCE MANUAL MICRON 11/2017 13
1.5.1 SPC Alignment Check
Follow details in the Accuracy Check section previously described in this chapter. Record details
for each month.
Month Pre X Pre Y Pre
Theta
Post X Post Y Post
Theta
Front
Squeegee
Rear
Squeegee
1
2
3
4
5
6
7
8
9
10
11
12
1.5.2 Machine Cycle Count
Record the printer cycle count for each month.
Month Insert the Cycle Count Number of cycles between the visits
1
2
3
4
5
6
7
8
9
10
11
12