YS12P_YS12F_Mainte_E.pdf - 第85页
3-20 3 Periodic maintenance items 5 Remo ve the belt from the conve yor . Remove the conveyor belt from the pulley and conveyor guide groove. 6 Inspect the conv ey or belt. Check the transfer sur face of the detached bel…
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3
Periodic maintenance items
4
Loosen the belt.
1. Before loosening the conveyor belt, mark at the current position of pulley with a permanent marker.
2. Loosen the pulley mounting screws applying the tension with a hex wrenches (5 and 4) referring to
the figure below.
3. Move the pulley to the direction that the belt is loosened.
Loosening the belt
Hex wrench (4)
Hex wrench (5)
Mark pulley position.
Direction that belt is loosened
53356-L6-00
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3
Periodic maintenance items
5
Remove the belt from the conveyor.
Remove the conveyor belt from the pulley
and conveyor guide groove.
6
Inspect the conveyor belt.
Check the transfer surface of the detached
belt for worn-out or scuffing. If the belt worn-
out amount or scuffing is large, replace the
conveyor belt referring to chapter 4,"4.
Replacing the conveyor belts" .
7
Clean the belt guides and pulleys.
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
.
53357-L6-00
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 a solvent, be
careful not to spill the solvent on the bearing in the
pulleys during cleaning.
8
Replace the conveyor belt.
1. Replace the belt temporarily while
putting it on the pulley.
2. Move the pulley to the position marked
in Step 4 and tighten the mounting bolts.
3.
If looseness of the belt is found, adjust the
pulley position to apply tension.
53358-L6-00
n
NOTE
The conveyor belt tension standard value of this
machine is 550 to 610 Hz. Adjust the conveyor belt
tension with a tension meter as necessary. The same
standard value applies to the extension conveyor type.
c
CAUTION
The tightening torques of the pulley mounting bolt that
applies tension is 5.5N·m. Do not tighten the bolt
excessively.
Step 7
Cleaning the belt guide and pulley
Spatula (made of plastic)
Belt wear debris
sticking to pulley
Outer peripheral
surface of pulley
Belt guide
Brush
Step 8
Tension measurement point
Tension measurement point
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3
Periodic maintenance items
9
Mount the board clamp plate.
1. Fit the board clamp plate into its original
position and tighten the board clamp
plate mounting bolts with a hex wrench
(3).
2. Remove the square cloth
placed on the
push-up plate.
0
Check the belt rotating condition.
1. Make sure that the board clamp plate
top surface is approx. 0.5mm lower than
the belt upper surface.
2. Close the machine safety cover and
cancel the emergency stop. If the
machine is equipped with a carriage, set
the carriage.
3. Press the [Conveyor In] button on the
[Unit] - [Conveyor] screen to turn on the
conveyor motor and check the belt
rotation.
4. If the conveyor belt rotation is uneven or
if the belt deflects, adjust the pulley
position that applies tension again.
54315-L6-00
c
CAUTION
When the difference between the belt upper surface
and board clamp top surface is very little, the board
transfer error may occur easily. In this case, contact
YAMAHA sales representative.
Step 10
0.5 mm
Conveyor drive buttons
Left Right
Low Left Low Right
Checking conveyor belt rotation
Checking the belt rotating condition
Board clamp plate
Board clamp plate
Conveyor belt
Belt upper surface