YS24_Mainte_E.pdf - 第77页

3-13 3 Periodic maintenance items 3. T wo-month inspection 3.1 Cleaning and greasing the X and Y axes T his section describes how to clean and grease the X and Y axes. See "Chapter 5 Lubrication points and schedule&…

3-12

Periodic maintenance items

2.2 Inspecting each axis

Inspect the ball screws on the X, W, U, and PU (Push-up) axes and the guides on the X, Y, W, and U axes. The

checkpoints are listed below.

A grease spattering prevention cover is attached to the X-axis ball screw. Before starting the inspection work,

detach this grease spattering prevention.

TIP

See "3.1 Cleaning and greasing the X and Y axes" described later on for detaching or attaching the anti grease

splatter cover.

TIP

See "3.1 Cleaning and greasing the X and Y axes", "3.2 Cleaning and greasing the push-up axis (PU-axis)", "4.8 Dual

stage only: Cleaning and lubrication of U axis (W2 axis)" and "5.3 Cleaning and lubricating the W-axis" in this chapter,

and "Chapter 5 Lubrication points and schedule" for positions of ball screws and guides of each axis.

Checkpoints

1. Any foreign matter adhering to the ball screws and guides?

Check if any fallen chips have adhered to the X and Y axis ball screws and/or X, Y and W axis guides.

2. Do the ball screws and 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.

3. Any abnormal sounds from the ball screws?

Press the emergency stop button. Then check for any abnormal sounds while pressing the X-axis by hand.

Countermeasures

1. Ball screws and 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 "3.1 Cleaning and greasing the X and Y axes", "3.2 Cleaning and greasing the push-up axis

(PU-axis)", "4.8 Dual stage only: Cleaning and lubrication of U axis (W2 axis)" and "5.3 Cleaning and lubricating the

W-axis" in this chapter described later on.

3. Contact YAMAHA sales representative when abnormal sounds occur even after trying the countermeasures in the above

steps 1 and 2.

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.

3-13

Periodic maintenance items

3. Two-month inspection

3.1 Cleaning and greasing the X and Y axes

This section describes how to clean and grease the X and Y axes. See "Chapter 5 Lubrication points and

schedule" for lubrication points and lubrication form. Prepare a grease gun and specified grease (NSL).

CAUTION

When performing the cleaning and greasing work, use square bandages to prevent parts from being lost or entering

the Y-axis linear part.

CAUTION

For information on the use of grease, read the caution items for handling in "Safety instructions" and chapter 1, "2.2.2

Lubricating tools and grease".

CAUTION

If abnormal sound is heard from the X and Y axis ball screws or guides, contact YAMAHA sales representative.

Disassembly and cleaning of the ball screws or guides by the user will void the warranty.

3.1.1 Cleaning and greasing the X-axis ball screw

Make the preparations for the

cleaning and greasing work.

1. Take off all accessories susceptible to the

magnetic fields, such as a wristwatch

and/or magnetic ID card.

2. Press the emergency stop button and

then open the machine safety cover.

3. If the machine is equipped with a

carriage, remove the carriage.

4. Place a square cloth on the Y-axis linear

area and the push-up plate.

Remove the grease spattering

prevention cover.

Remove the X-axis grease spattering

prevention cover.

1. Use a Phillips screwdriver to remove the

screws securing the left side of the

grease spattering prevention cover.

2. Move the head unit all the way to the

left side and remove the screws securing

the right side of the grease spattering

prevention cover.

3. Remove the grease spattering prevention

cover by pulling it to the right.

53305-L2-00

TIP

When it is difﬁcult to access the anti grease splatter

cover, prepare a step.

TIP

When attaching the anti grease splatter cover, follow

the reverse order of procedure described above.

Removing the X-axis grease spattering prevention cover

Phillips screwdriver

Square bandage

Grease spattering prevention cover

Step 2

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Periodic maintenance items

Clean the ball screws.

1. Using the handle, move the head unit to

one end of each axis.

2. Wipe away the old grease and dirt from

the ball screw with a lint-free cloth that

does not raise dust.

3. Move the head unit to the opposite side,

and wipe the ball screw also on the

opposite side.

53307-L2-00

NOTE

Wipe away the old grease and dirt in the lead groove

of the ball screw. Also check that no debris or residue

remains in the lead groove.

Apply grease to the ball screws.

Set the standard nozzle on the grease gun,

and inject the specified grease (NSL) from

the grease nipple (at the opposite side of

the X axis motor).

53315-L2-00

NOTE

Repeat the process below, and inject until the new

grease ﬂows over the gap.

• Injection of grease

• Move the axis with hand a little

Wipe off the excess grease.

1. Grasp the movement handle and move

the head unit to one end.

2. Wipe all excess grease from the ball

screw and nut end faces.

3. Move the head unit to the opposite end

and wipe all excess grease from the

opposite-end ball screw and nut end

faces.

53317-L2-00

Perform a warm-up.

1. Remove the square cloth.

2. Reattach the spatter prevention cover.

3. Close the machine’s safety cover, and

cancel the emergency stop. If the

machine could be equipped with a

carriage, set the carriage.

4. Open the Warm-up screen, and perform

the warm-up operation for approximately

8 minutes.

Cleaning the X-axis ball screw

Step 3

Lint-free cloth

Greasing the X-axis ball screw

Step 4

Grease nipple for

X-axis ball screw

Wiping off the excess grease

Step 5

Excess grease