YS24X_Mainte_E - 第107页
3-40 3 Periodic maintenance items 4.5 Checking spline shaft operation 4.5.1 Checking spline shaft Z-axis operation T he following describes the operation inspecting of the spline shaft Z-axis. e 1 Mo ve the head unit. 1.…
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Periodic maintenance items
4.4.2 Checking the negative pressure
After cleaning the spline shafts, check the negative pressure (vacuum level) generated in each head.
1
After assembly, check the vacuum
levels.
1. Leave nozzles detached from the heads.
2. Press the [Vacuum] button in the [Unit]
– [Head] screen to generate a negative
pressure, and read the value displayed in
“Maximum Value” of the screen.
Check the value is the standard value or
less in the open state as shown below.
54309-L4-10
2
Reattach the nozzles.
Attach the nozzles by hand back to the
heads.
n
Vacuum level criteria in spline air path
No nozzles and open : 80 or less
When nozzle is sealed : 190 or more
n
NOTE
The vacuum level in the spline shaft air path might sometimes differ slightly depending on the air source and operating
conditions. Use the above criteria for reference during maintenance.
Checking the vacuum level
Step 1
[Vacuum] button
Read "Max" values.
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Periodic maintenance items
4.5 Checking spline shaft operation
4.5.1 Checking spline shaft Z-axis operation
The following describes the operation inspecting of the spline shaft Z-axis.
e
1
Move the head unit.
1. Press the emergency stop button and then open the machine safety cover.
2. If the machine is equipped with a carriage, remove the carriage to allow you to easily access the
head.
3. Move the head unit forward.
2
Move spline shaft Z-axis up or
down.
Press down the lower part of the joint block
of the spline shaft Z-axis with finger. The joint
block returns to the original position by
releasing finger. Check that no heaviness,
unsteady movement, or abnormal sound
compare to the other spline shaft is found.
53364-L4-00
n
NOTE
If lacking grease on the surface of the spline shaft, the
surface may get rusted. Make sure not to touch the
shaft area.
c
CAUTION
If operating machine with the unsteady movement of
the spline shaft may cause fatal accidents. Stop
operating the machine if any abnormality is noticed
and contact YAMAHA sales representative.
4.5.2 Checking and cleaning around spline shaft
Check the area around the spline shaft.
e
1
Move the head unit.
1. Press the emergency stop button and then open the machine safety cover.
2. If the machine is equipped with a carriage, remove the carriage to allow you to easily access the
head.
3. Move the head unit forward.
2
Visually check around the spline
shaft.
Check that no dust or dirt is found on the
spline shaft.
3
Clean the spline shaft.
If dust or dirt is found on the spline shaft,
wipe it with a lint-free cloth or a cotton
swab.
53365-L4-00
c
CAUTION
If lacking grease on the surface of the spline shaft, the
surface may get rusted. Make sure not to wipe away
grease completely. However, if the grease is lacking
due to cleaning, apply anti-rust lubricant with the
procedure on the next.
Moving Z-axis
Step 2
Press down here with finger.
Joint block
Cleaning the spline shaft
Cotton swab
Step 3
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Periodic maintenance items
4.5.3 Lubricating the spline shaft (as needed)
n
NOTE
Basically, the lubricating the spline shaft (Z-axis) is not required. However, the grease on the spline shaft surface is
removed by touching with hand or by sprinkling solvent. As a result, the spline shaft gets easily rusted. Apply the
specified grease (NSL) slightly for anti-rusting as needed.
e
1
Move the head unit.
1. Press the emergency stop button and
then open the machine safety cover.
2. If the machine is equipped with a
carriage, remove the carriage to allow
you to easily access the head.
3. Move the head unit forward.
2
Clean the spline shaft.
Wipe the spline shaft with a lint-free cloth or
a cotton swab.
53366-L4-00
3
Apply grease to spline shaft.
Apply the specified grease to finger slightly.
Spread the grease uniformly over the
surface of the shaft.
53339-L4-10
4
Wipe away grease.
1. Move the spline shaft up or down
manually.
2. Wipe away excess grease on the upper
and lower area of the shaft with a
lint-free cloth or a cotton swab.
c
CAUTION
Make sure not to wipe away the grease on the surface
of the spline shaft completely.
Cleaning the spline shaft
Step 2
Cotton swab
Applying grease to spline shaft
Step 3
Spline shaft