YRM20_Mainte_E.pdf - 第78页

2. Monthly maintenance items 3-1 1 Chapter 3 Periodic maintenance items 2.1 X-axis T his section describes the inspection, cleaning, and lubrication procedures for X-axis. F or details on the lubrication points and sched…

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2. Monthly maintenance items
3-10
Chapter 3 Periodic maintenance items
2. Monthly maintenance items
This section describes mainly the procedures for cleaning and lubricating after inspecting the X-axis
ball screw and guide, and Y-axis guides and linear scales. The inspection items and cautions are
given below.
►
Inspection items
1. Any foreign matter adhering to the ball screws and linear guides?
Check if any fallen chips have adhered to the X and Y-axis ball screws and/or X, Y and W-axis
linear guides.
2. Do the ball screws and linear guides have the correct amount of grease?
Check if grease has flowed off or splattered in the air failing to adhere. Also check if grease has
discolored or hardened.
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3. Any abnormal sounds from the ball screws?
Press the emergency stop button. Then check for any abnormal sounds while pressing the X-axis
manually.
Countermeasures
1. Ball screws and linear guides may be damaged when chips and other material bite into them. If
chips are adhering, wipe them off along with the grease or remove with tweezers, etc.
2. Apply grease referring to “Cleaning and lubrication” described later on.
3. Contact YAMAHA sales representatives when abnormal sounds occur even after trying the
countermeasures in the above steps 1 and 2.
►
Precautions
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WARNING
THIS MACHINE CONTAINS PARTS GENERATING STRONG MAGNETIC FIELDS. GREAT CARE SHOULD BE TAKEN WHEN A
PART OF YOUR BODY IS PUT INSIDE THE MACHINE FOR THE MAINTENANCE WORK. CAUTIONS REGARDING
FERROMAGNETIC FIELDS ARE DESCRIBED IN THE SECTION, "SAFETY INSTRUCTIONS", AT THE BEGINNING OF THIS
DOCUMENT. ALWAYS THOROUGHLY READ THIS SECTION TO FULLY UNDERSTAND ITS CONTENTS.
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CAUTION
If abnormal noise is emitted from the ball screw or linear guide of each axis, contact YAMAHA sales representative.
Disassembly and cleaning of the ball screw or linear guide by the user will void the warranty.
CAUTION
When performing the cleaning and greasing work, use square cloth to prevent parts from being lost or entering the Y-axis
linear part.
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CAUTION
When handling grease, read the safety precautions stated in "Safety instructions" and "2.3.2 Lubricating tools and
grease" in Chapter 1.
2. Monthly maintenance items
3-11
Chapter 3 Periodic maintenance items
2.1 X-axis
This section describes the inspection, cleaning, and lubrication procedures for X-axis. For details on the
lubrication points and schedule, see "Chapter 4 Lubricating points". Prepare grease guns (standard nozzle type)
and the specified grease (NSL).
2.1.1 Cleaning/greasing X-axis ball screw
1
Prepare for work.
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1. Remove all items sensitive to magnetic fields
such as wristwatches and magnetic ID cards.
2. Press the emergency stop button and detach
the feeder exchange carriage, then open the
machine safety cover.
3. Place a square cloth on Y-axis linear guide
and push-up plate.
2
Detach the grease spattering prevention
cover.
1. Loosen mounting screws for grease
spattering prevention cover (right from
observers' view) using Phillips screwdriver.
And loosen the left mounting screw a little.
2. Move the head unit to left and pull out the
grease spattering prevention cover to right
to remove.
TIP
Reattach the X-axis grease spattering prevention cover by
reversing the above removal procedure.
3
Clean the ball screws.
1. Move the head unit to one end by holding a
handle.
2. Wipe away the old grease and dirt from the
ball screw with a lint-free cloth or similar.
3. Move the head unit to the opposite end and
wipe the opposite-side ball screw.
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NOTE
When cleaning the ball screw, carefully clean its groove
area as well. After cleaning, make sure that no dust, lint
or debris remains on the ball screw.
4
Apply grease.
1. As shown in the figure at right, move the
head unit manually to one end to be visible.
2. Use a grease gun (standard type) to inject
the prescribed grease at the grease nipple.
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NOTE
Inject until the grease begins to seep out from the gap
between the ball screw and ball push.
Detaching the spattering prevention cover
Step 2
Grease spattering prevention cover
Phillips screwdriver
Cover mounting screw
53320-KMX-00
Cleaning ball screw
Step 3
Lint-free cloth
Ball screw
53321-KMX-00
Applying grease
Step 4
Grease gun (standard type)
Grease nipple
Ball bush
Ball screw
53322-KMX-00
2. Monthly maintenance items
3-12
Chapter 3 Periodic maintenance items
5
Wipe off the excess grease.
1. Move the head unit to one end by holding a
handle.
2. Wipe off excess grease from the ball screw
and nut end face.
3. Move the head unit to the opposite end and
wipe off excess grease from the ball screw
and nut end face on the opposite side.
6
Perform aging.
1. Retrieve the square cloth.
2. Reattach the spatter prevention cover.
3. Close the machine safety cover and attach
the feeder exchange carriage, then release
the emergency stop.
4. Open the Warm-up screen, and perform
aging operation for about 8 minutes.
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7
Check the grease condition.
1. After aging operation is finished, press the
emergency stop button, detach the feeder
exchange carriage, and open the machine
safety cover.
2. Remove the grease spattering prevention
cover.
3. Wipe off the grease which has piled on the
ball screw and its end faces.
4. Attach the grease spattering prevention
cover.
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CAUTION
Repeat Steps 6 and 7 until grease piling no longer occur.
Beginning production with grease piling remains could
cause the grease to spatter.
Wiping off the excess grease
Step 5
Excess grease
53323-KMX-00