YRM20_Mainte_E.pdf - 第113页

5. 1-year maintenance 3-46 Chapter 3 Periodic maintenance items 4 L oosen the belt. 1. Before loosening the conveyor belt, mark the current position of pul ley bracket (CV2, CV3) and pu lley mounting bolt (CV1, CV4) usin…

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5. 1-year maintenance
3-45
Chapter 3 Periodic maintenance items
5.2 Inspecting conveyor belt and cleaning guide
Inspect the worn status of conveyor belt. As the worn of belt transferring surface proceeds, a stable board
transfer is disturbed by slip. The periodical inspection of the worn status is required.
Moreover, small particles of worn parts piled upon the light-receiving surface of conveyor sensor may lead a
mis-detection of board or so. And small particles of worn parts which piled up around the belt guide section
or the outer periphery of pulley may make the belt stuck.
1
Set the conveyor to convenient width to
work.
1. Press the [Conveyor Width] button to display
the Conveyor width changing screen.
2. Enter the width value which allow a hexagon
wrench to insert (approx. 200mm) in the
"Changed conveyor width" field and press
the [OK] button. Then the conveyor width is
changed to the specified.
2
Prepare for work.
e
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.
3. Open the machine safety cover and detach
the upper cover.
4. Place a square cloth on the push up plate.
3
Remove 4 mounting bolts of board
clamp plate (shown at right) using a
hexagon wrench (3), and detach the
board clamp plate.
c
CAUTION
Do not remove the bolts other than the 4 bolts illustrated
at right.
Removing the board clamp plate
Step 3
Board clamp plate Mounting bolt
53363-KMX-00
Changing the conveyor width
Step 1
[Width] button
Enter the value
which allows to insert a tool
(Approx. 200mm)
54304-KMX-00
5. 1-year maintenance
3-46
Chapter 3 Periodic maintenance items
4
Loosen the belt.
1. Before loosening the conveyor belt, mark the current position of pulley bracket (CV2, CV3) and pulley
mounting bolt (CV1, CV4) using a permanent marker.
2. Loosen the pulley bracket (hereinafter referred to as "bracket") using a hexagon wrench (3) and slide it to far
end of long hole (loosening direction).
For CV1 and CV4, loosen the pulley mounting bolt using a hexagon wrench (5) and (4), and slide the pulley.
CV2 and CV3
CV1 and CV4
Machine rear
CV4
CV1
CV3
CV2
Loosening the conveyor belt
Slide the bracket
Loosen the mounting bolt
Loosen the mounting bolt
Mark with a permanent marker
Bracket
Slide the pulley
Mark with a permanent marker
Entrance
Exit
: Bracket position : Pulley position
53364-KMX-00
5
Detach the belt from the conveyor by removing it from the pulley and board
guide.
5. 1-year maintenance
3-47
Chapter 3 Periodic maintenance items
6
Check the status of conveyor belt
whether there are no worn or fraying
on the transfer surface of detached belt.
When the many worn or fraying are
found, replace the conveyor belt
referring "Chapter 5 How to replace
consumable parts".
7
Clean the belt guide section and pulley.
1. Use a vacuum assembly (option) to suction
the belt wear debris on the belt guides and
sensors, etc.
2. Use a plastic spatula or similar tool to
remove the belt wear debris adhering to the
outer peripheral surface of the pulleys.
3. Use a brush or similar tool to remove the
belt wear debris caught in the belt guides.
53366-KMX-00
c
CAUTION
Use a plastic spatula and brush to avoid scratching the
pulleys and guides.
c
CAUTION
Do not use a solvent (IPA, etc.) unless the guides and
pulleys are excessively dirty. If using ethanol, be careful
not to spill the ethanol on the bearing in the pulleys during
cleaning.
8
Reattach the belt.
1. Temporarily place the belt on the pulley.
2. Move the bracket (pulley for CV1 and CV4) to the position marked in Step 4 and tighten the mounting bolt
by the following tightening torque. Be careful not to excess the specified value.
• Pulley bracket mounting bolt : 3.8 N•m
• Pulley mounting bolt : 5.5 N•m
3. If there is a slack in the belt, adjust the position of bracket (pulley for CV1 and CV4) to apply proper tension.
The tension measuring position and the specified tension value is shown below. Use a tension gauge as
necessary.
Tension standard: 190 - 220 Hz
Tension standard: 190 - 220 Hz
Tension standard: 400 - 450 Hz
Tension standard: 400 - 450 Hz
CV1CV2CV3CV4
Conveyor belt
Tension measuring position and specified tension value
Tension measuring position：
Transfer
direction
53367-KMX-10
Cleaning the belt guide section and pulley
Step 7
Plastic spatula
Belt guide section
Adhering belt wear debris
Brush
: Outer peripheral surface of pulley