YSi-X_Ope_E - 第85页
4-24 4 Maintenance 5.4 Checking the conveyor belt tension T his section describes how to check and adjust the tension on the con veyor belt. n When using a tension gauge to measure the belt tension When using a tension g…
4-23
4
Maintenance
7
Clean the pulley and the belt
groove on the board guide.
Using the vacuum assembly (option), suck in
belt wear dust particles from the belt groove
and the sensor detection surface. Also,
clean the pulleys and other parts for the
conveyor belt.
53429-M6-00
c
CAUTION
Though it rarely occurs, dust from belt wear might
sometimes adhere to and darken the outer
circumference of the pulley. If that happens, then
remove it with a metallic spatula, etc.
8
Reattach the belt.
Use the reverse of the removal procedure to
reattach the belt in place.
TIP
Proper belt tension and pulley pitch are as follows:
•
When a tension gauge is used
Tension 190 to 160Hz
Pulley pitch 128mm
•
When no tension gauge is used
Pulley pitch 35 to 38mm
See the next section 5.4, “Checking the conveyor belt
tension”, for more details.
c
CAUTION
The tightening torque for the tension pulley must be set
to 5.5N·m.
Cleaning the belt groove
Step 7
Belt groove
4-24
4
Maintenance
5.4 Checking the conveyor belt tension
This section describes how to check and adjust the tension on the conveyor belt.
n
When using a tension gauge to measure the belt tension
When using a tension gauge, set the belt tension and pulley pitch as follows:
• Tension 190 to 160Hz
• Pulley pitch 128mm
Pulley pitch when using a tension gauge
128mm
53438-M6-00
n
When not using a tension gauge
When not using a tension gauge, set the pulley pitch as follows:
• Pulley pitch 35 to 38mm
Pulley pitch when not using a tension gauge
35 to 38mm
53439-M6-00
4-25
4
Maintenance
n
How to adjust the belt tension
When the belt tension needs to be adjusted, follow the procedure below. Adjust the front and rear conveyor belts to the
same tension.
e
1
Press the emergency stop button.
2
Open the front safety door of the
machine.
3
Loosen the tension pulley.
Use the hex wrenches (4 and 5) as shown in
the figure on the right to loosen the tension
pulley.
53440-M6-00
4
Adjust the belt tension.
To increase the belt tension, slide the tension
pulley in the inward direction of the
machine. To decrease the belt tension, slide
the tension pulley to the outward direction
of the machine.
5
Tighten the tension pulley.
Use the hex wrenches (4 and 5) to tighten
the tension pulley.
c
CAUTION
The tightening torque for the tension pulley must be set
to 5.5N•m.
6
Check the belt rotating condition.
1. Turn the hexagonal spline shaft by hand
to rotate the belt and check if the belt
rotates smoothly with no slack.
If there is a large slack in the belt, adjust
the tension pulley position.
2. Close the front safety door of the
machine, release the emergency stop
button, and press the [READY] button.
3. On the [Unit]-[Conveyor] tab, press the [L.
Conv.] or [R. Conv.] button to rotate the
belt.
e
4. Press the emergency stop button, open
the front safety door of the machine,
and check the belt condition. If there is
no problem, the adjustment is complete.
Loosen the belt tension
Step 3
Hex wrench (6)
Tension pulley
Hex wrench (4)