YSM20_YSM20W_Mainte_E.pdf - 第87页
3-29 3 Periodic maintenance items 3.7 PU-axis T he PU (push-up) axis is designed to prevent flexing or warping of the board during clamping and is important because it prevents depressing of the board during component mo…
3-28
3
Periodic maintenance items
7
Apply the grease to the spline shaft.
Uniformly apply the specified grease (LRL) to
the spline shaft with finger.
n
NOTE
This grease application work uses three kinds of grease.
Perform the work while carefully checking that incorrect
grease is not applied.
8
Wipe off the excess grease.
Move the head up and down several times
to wipe off the excess grease of the grease
accumulation portion.
9
Return the head to original state.
1. Attach the front cover.
2. Attach the air hoses.
3. Remove the square cloth.
0
Check the air hose position.
Check that the air hoses are not crossing
and the air hose marking position is aligning
with the bottom of the tube holder.
c
CAUTION
If the air hose position is incorrect, the air hoses are
pulled or bent when the head is lowered. This may
damage the air hoses or parts
.
TIP
The air hose marking position is 80
mm from the lower
end of the hose.
Wiping off the excess grease
Step 7
Grease accumulation
53338-N2-10
Air hose position
Step 9
Do not cross air hoses.
Make sure that air hose marking position
is aligning with bottom of tube holder.
Front cover
Incorrect attachment of air hoses (when head is lowered)
Air hose is damaged
by hitting.
Bending of air hose
533E5-N2-00
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3
Periodic maintenance items
3.7 PU-axis
The PU (push-up) axis is designed to prevent flexing or warping of the board during clamping and is important
because it prevents depressing of the board during component mounting.
The PU axis also prevents deviations in the component mounting accuracy due to the board depressing during
component mounting, so it is important to regularly clean and inspect the PU axis to ensure it operates
correctly.
c
CAUTION
If trouble occurs with the PU-axis, contact YAMAHA sales representatives. The disassembly and cleaning of the
machine made by the customer is beyond the coverage of the warrantee.
3.7.1 Cleaning and lubricating the PU-axis ball screw
1
Prepare for work.
Take off all accessories susceptible to the
magnetic fields, such as a wristwatch and
magnetic ID card.
2
Change the conveyor width to
maximum width.
1. Press the [Width] button on the [Unit]
- [Conveyor] screen to display the
"Conveyor Width" screen.
2. Enter the maximum width in the "Target
Width" box and press the [OK] button.
The conveyor width is changed to the
specified width.
n
NOTE
The maximum conveyor width varies depending on the
machine type as follows.
YSM20 Dual-stage type: 490 mm
YSM20 Single-lane type: 490 mm
YSM20W Single-lane type: 742 mm
Regarding Dual-lane type, enter the maximum width of
lane 1 or lane 2 aligning the lane to be lubricated.
"Maximum width for one side lane"
YSM20 Dual-lane type: 410 mm
YSM20W Dual-lane type: 662 mm
3
Raise the push-up unit.
1. Press the [Push-up] button on the stage
or lane to perform grease up to display
the “Conveyor Push-up” screen.
2. Enter “0.1 mm” in “Thickness” box and
press the [OK] button. The push-up unit is
raised.
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4
Remove the old grease.
1. Press the emergency stop button and
then open the machine safety cover.
2. Detach the carriage if the machine is the
carriage type, .
3. Wipe off the old grease on 2 ball screws
with lint-free cloth.
Changing the conveyor width
Step 2,3
Step 3Step 2
54310-N2-00
Cleaning the ball screw
Step 4
Cleaning cloth
Ball screw (2 places)
Dual-stage
Dual-lane
53374-N2-00
3-30
3
Periodic maintenance items
5
Apply the new grease by hand.
Apply as much as 2 cm of new grease to
finger and rub it evenly into the ball screw
grooves.
6
Spread the grease.
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1. Press the emergency stop button and
then open the machine safety cover.
Attach the carriage if the machine is the
carriage type.
2. The push-up unit moves down by pressing
the [Push up] button.
3. Move up and down the push-up unit
several times to spread the grease. After
spreading the grease, put the push-up
unit in its up state.
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7
Wipe away excess grease by hand.
1. Press the emergency stop button and
then open the machine safety cover.
Detach the carriage if the machine is the
carriage type.
2. Remove excess grease by hand.
Applying the grease
Step 5
Ball screw (2 places)
Dual-stage
Dual-lane
Grease
53339-N2-00