N7201A617E00_0317 - 第204页
NPM-W 2 EJM7DE-MB-06M-00 Inspecting the belt tension on the PCB conveyor 6-5 -5 ● Enter the following numerical values to the frequen cy measuring instrument ( Acoustic b elt tension me ter pro vided by a belt manufactur…
NPM-W2 EJM7DE-MB-06M-00
Every
560
hours
PeriodicPeriodicPeriodicPeriodic
inspection
6-5-4
Inspecting the extension conveyor belt
Explains an inspecting method when an extension conveyor is installed to the downstream process.
Tool used: Belt tension meter Time required: 5 minutes for single conveyor, 10 minutes for dual conveyor
7
Belt
To
in
P. 6 - 5 - 3
8
6
Movable side
Fixed side
Movable side
Fixed side
Movable side
Fixed side
■Single conveyor
■Dual conveyor
Check the belt
Lane 1
Lane 2
From
in
P.6-5-1
Motor pulley
●It describes how to work at the front side based on the premise of the front reference.
●For the rear reference, detach the tray feeder and work at the rear side.
●The inspection procedure is the same as the PCB conveyor except step ⑦. Follow the procedure of the
PCB conveyor for the process before and after step ⑦.
●Motor pulley position
●Belt position
●Motor pulley position
●Belt position
●Rotate the belt in the motor pulley (indicated by the arrow), and
replace it if you find scratch, adhesion of dust, wear-out or
warn out or scuffing on it.
●Two belts on each lane for dual conveyor, two belts for single
conveyor. (See the figure below)
NPM-W2 EJM7DE-MB-06M-00
Inspecting the belt tension on the PCB conveyor
6-5-5
●Enter the following numerical values to the frequency measuring
instrument (Acoustic belt tension meter provided by a belt
manufacturer) in advance. Flicking your fingers at the center
section (P shown in the drawings below) of each span,
measure the natural frequency with the frequency measuring
instrument.
Input value
●Adjust and fix the tension pulley if the measurement value falls under the prescribed value.
Prescribed value
Maintenance
6-5
Belt unit mass 0.7 g/m
Belt width 4.5 mm
Span length See below
Inspecting PCB/extension
conveyor
(option) 3
■Single conveyor (Unit : mm)
■Dual conveyor (Unit : mm)
●Fixed rail： 4 rails
A
B
C
D-1
D-2
A
B
C
109109
P
P
P
P
P
P
P
P
●Movable rail： 4 rails
● Lane 1/ Lane 2 Fixed rail： 8 rails
A
B
A
B
C
D-1
D-2
C
C
D-2
D-1
C
109
109
P
P
P
P
P
P
P
P
P
P
P
P
Conveyor type Location No. Standard value (Hz)
Common to both
Single conveyor and
dual conveyor
Fixed rail
A
365 ± 20
B
530 ± 25
Movable rail
C
985 ± 50
D-1
1020 ± 50
D-2
820 ± 40
”●” in the figure
indicates the tension
pulley
● Lane 1 Movable rail： 4 rails (Arrow E in P.6-5-6)
● Lane 2 Movable rail： 4 rails (Arrow F in P.6-5-6)
NPM-W2 EJM7DE-MB-06M-00
6-5-6
Inspecting the belt tension of the PCB conveyor
●Enter the following numerical values to the frequency measuring instrument (Acoustic belt tension meter
provided by a belt manufacturer) in advance. Flicking your fingers at the center section (P shown in the
drawings below) of each span, measure the natural frequency with the frequency measuring instrument.
Input value
●Adjust and fix the tension pulley if the measurement value falls under the prescribed value.
Belt unit mass 0.7 g/m
Belt width 4.5 mm
Span length See below
Prescribed value
Every
560
hours
PeriodicPeriodicPeriodicPeriodic
inspection
Conveyor type Standard value (Hz)
Single
315 ±20Hz
Dual
Lane 1
Lane 2
●Fixed rail
●Movable rail
Tension pulley
■Single conveyor (1 rails on each)/ Dual conveyor (2 rails on each)
(Unit：mm)
P
P
Tension pulley
E
F
Movable side
Fixed side
Movable side
Fixed side
Lane 1
Lane 2
●Arrows of PCB conveyor movable rails