YS24_Mainte_E.pdf - 第58页
2-2 2 Daily maintenance items 1. Checking the nozzle Solder sticking to the nozzle tip or a clogged nozzle hole can cause component pickup errors and recognition errors. Poor nozzle spring action can also cause pickup an…
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Daily maintenance items
Before beginning work
In most cases, maintenance should be performed with the machine’s power turned Off.
However, some maintenance works are performed under emergency stop conditions with the machine’s power
turned on. In such cases, ensure adequate safety and press the emergency stop button before beginning the
maintenance.
The power is turned on during maintenance when moving axes or machine operation check are required
depending on the maintenance work while the machine’s power turned on.
In the case also, ensure adequate safety before beginning the maintenance.
Make sure that the following conditions are met when operating the machine.
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Operating conditions
1. Supply air pressure is kept at correct pressure.
2. All safety covers are closed.
3. When the machine is equipped with exchange carriages, all exchange carriages are clamped.
4. Nozzles and other units are attached in place.
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NOTE
The description "Cancel the emergency stop." is in the procedures of this manual. It means "releasing the emergency
stop and pressing the [Ready] button to turn the servo on".
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Daily maintenance items
1. Checking the nozzle
Solder sticking to the nozzle tip or a clogged nozzle hole can cause component pickup errors and
recognition errors. Poor nozzle spring action can also cause pickup and mounting errors. To prevent such
problems periodically inspect and clean each nozzle.
1.1 Check with software
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How to check for a dirty nozzle (with the [Tip Dirt Check] button)
The term "dirty nozzle" as used here indicates shiny material such as solder adhering to the nozzle tip. This
shiny portion might be mistaken for a component and cause recognition errors. [Tip Dirt Check] is a tool that
judges the nozzle contamination status by recognizing the nozzle tip in the non-component status with the
camera.
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NOTE
[Tip Dirt Check] is a function that recognizes the reflection of the light around the nozzle center. So, applicable nozzles
are those with a small tip, such as 301A, 302A, and 311A.
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NOTE
Since the nozzle specification may vary depending on
the machine, some machines may require additional
settings. For details about settings, contact YAMAHA
sales representative.
1
(Without nozzle station) Replace
the nozzle.
1. Press the [Required Nozzles] button on
the [Setup] screen to check the nozzle to
be used for the production.
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2. Press the emergency stop button to open
the machine safety cover.
3. Attach the nozzle to be used for the
production to the head.
4. Close the machine safety cover and
cancel the emergency stop.
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NOTE
If the machine is equipped with the nozzle station, skip
Step 1.
2
Press the [Tip Dirt Check] button.
Press the [Tip Dirt Check] button on the
[Setup] screen.
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Select the item to be executed.
After checking the displayed message,
select the desired button.
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When [Yes] was selected
Performs auto nozzle change and checks all relevant
nozzles.
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When [No] was selected
Checks relevant nozzles of all nozzles currently
attached to the head.
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4
Check the message.
Check the message. If the check is
determined as NG, clean the nozzle while
referring to "1.2 Nozzle cleaning" in Chapter
3.
Pressing the [Tip Dirt Check] button
Step 2
[Tip Dirt Check] button
Selecting the item to be executed
Step 3
When [No] was selected
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Daily maintenance items
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How to check for clogged nozzles (on the [Unit] - [Head] screen)
The term "clogged nozzle" used here indicates that material such as solder is adhering to the nozzle hole, causing a rise
in negative pressure even if no component is being picked up by the nozzle. This state might cause problems such as
component mounting errors. The following describes the checking procedure for clogged nozzles using Type 302A
nozzles as an example.
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NOTE
The vacuum level when nozzle is open, which is the criterion for clogged nozzle, varies depending on the nozzle types.
See the next section for the vacuum level when nozzle is open other than Type 302A nozzle.
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1
Attach the nozzle.
1. Press the emergency stop button and
attach Type 302A nozzles to all tables
and heads. When the machine has a
nozzle station, press the [Nozzle Change]
button to change the nozzles.
2. Select a table, and attach a nozzle on
both A and B head units.
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2
Reset the numerical figure.
Open the [Unit] - [Head] screen. Then press
the [Reset] button on the lower right of the
screen to reset the pickup level values.
Perform the table selection and reset the
pickup level values of all tables.
3
Generate negative pressure.
On the [Unit] - [Head] screen, set the
[Vacuum] buttons for all heads to ON. When
this value starts rising, wait 5 to 10 seconds
and set to OFF. Perform the table selection
and reset the pickup level values of all
tables.
4
Check the vacuum levels.
Change the table sequentially to read all
"Max" values shown in red on the [Head]
screen. If this value is 80 to 120, it is in the
normal range. If higher than 120, the nozzle
hole might be dirty. Clean the nozzle seeing
chapter 3, "1.2 Nozzle cleaning" and "2.1
Cleaning the nozzle air path".
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NOTE
If a correct value cannot be obtained by performing steps 1 to 4 after cleaning the nozzle, the inside of the spline
shaft might be not clean.
Negative pressure generation
Step 1 to 3
[Nozzle Change] button[Vacuum] button [Reset] button[Table selection] button
Negative pressure check
Step 4