YSM20R_YSM20WR_Mainte_E.pdf - 第87页

3-26 3 Periodic maintenance items 3.5.3 HM head: Applying grease to spline shaft (when required) n NOTE Basically, it is not necessary to apply grease to spline shaft (Z-axis) of HM head unit. However , if touching the s…

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Periodic maintenance items

3.5 HM Head: Checking Z-axis operation

3.5.1 HM head: Checking spline shaft Z-axis operation

This section describes how to check the spline shaft Z-axis operation of HM head.

Move the head unit.

1. Press the emergency stop button and then open the machine safety cover.

2. If the machine is carriage type, detach carriage to easily access to the head unit.

3. Move the head unit forward.

Move up/down spline shaft Z-axis.

Press down the bottom of joint block for

spline Z-axis with finger. It 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.

NOTE

Do not touch the shaft as the surface may get rusted if

lacking grease.

CAUTION

Fatal error may occur if operating a machine with

unsteady movement of spline shaft. Stop the machine

in this case and contact YAMAHA sales representatives.

3.5.2 HM head: Checking/cleaning around spline shaft

Check and clean the area around the spline shaft of HM head.

Move the head unit.

1. Press the emergency stop button and then open the machine safety cover.

2. If the machine is carriage type, detach carriage to easily access to the head unit.

3. Move the head unit forward.

Visually check around spline shaft.

Check that no dust or dirt is found on the

spline shaft.

Clean the spline shaft.

If dust or dirt is on the spline shaft, wipe it

with lint-free paper or cotton swab.

CAUTION

Do not completely wipe off grease on spline shaft

surface as the surface may get rusted due to the lack

of grease. However, apply grease for anti-rust with the

procedure on next page if the grease is wiped off due

to cleaning.

Checking Z-axis operation

Step 2

Press down here with finger.

Joint block

53333-KMK-00

Cleaning spline shaft

Step 3

Cotton swab

53334-KMK-00

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Periodic maintenance items

3.5.3 HM head: Applying grease to spline shaft (when required)

NOTE

Basically, it is not necessary to apply grease to spline shaft (Z-axis) of HM head unit. However, if touching the shaft

surface or solvent sprayed on it, the grease is removed and rust may appear. Slightly apply speciﬁed grease (NSL) for

anti-rust as needed.

Move the head unit.

1. Press the emergency stop button and

then open the machine safety cover.

2. Move the head unit to easily access to

the head unit.

3. Move the head unit forward.

Clean the spline shaft.

Clean the spline shaft with lint-free cloth or

cotton swab.

Apply grease to the spline shaft.

Apply and spread thinly specified grease

(NSL) with finger uniformly over the shaft

surface.

Wipe off the excess grease.

1. Move up/down the spline shaft several

times manually.

2. Wipe off excess grease on top and

bottom of the spline shaft with lint-free

cloth or cotton swab.

CAUTION

Make sure not to wipe off grease on spline shaft surface

completely.

Applying grease to spline shaft

Step 3

Grease (Apply uniformly.)

53335-KMK-00

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Periodic maintenance items

3.6 FM head: Cleaning/lubricating around Z-axis ball screw

When using the FM head, it is normally necessary to clean and lubricate the ball screw, spline shaft, and guide

once every 3 months. Follow the steps below to perform the cleaning and lubrication work.

Move the head unit.

1. Take off all accessories susceptible to the

magnetic fields, such as a wristwatch

and magnetic ID card.

2. Press the emergency stop button and

then open the machine safety cover. If

the machine is carriage type, detach

carriage to easily access to the head unit.

3. Move the head unit to a convenient

position for maintenance work.

4. Place a square cloth under head unit.

Remove the air hose and the front

cover.

1. Remove screws on front cover with hex

wrench (3) holding the cover to avoid

falling.

2. Disconnect the air hose from the top and

bottom joints.

NOTE

Remove the air hose while it is attached on the front

cover.

Clean the ball screw.

Use a lint-free cloth to wipe off the dust and

dirt on the ball screw.

1. Lower the head and clean the upper

part of the ball screw as shown in the

figure on the right.

2. Raise the head and clean the lower part

of the ball screw.

NOTE

Carefully wipe the ball screw until its grooves during

cleaning work. Additionally, check that there is no dust

after cleaning.

Clean the spline shaft and guide.

In the same manner as the ball screw, wipe

off contaminants from the spline shaft and

guide with a lint-free cloth while moving the

shaft up and down.

Apply the grease to the guide.

Uniformly apply the specified grease (AFF)

with finger. For portions where hand is

difficult to enter, such as the head at the

center, apply the grease using a cotton

swab.

Removing the front cover

Step 2

Rear side of front cover

Air hose

Tube holder

Cover clamp bolt

Joint

Front cover

53336-KMK-00

Cleaning the ball screw

Step 3

Cloth

Ball screw

53337-KMK-00

Cleaning the spline shaft and guide

Step 4

Cleaning cloth

Spline shaft

Guide

53338-KMK-00