17
■
Belt Tension
Do not take up belt too much, but only to extent that belt does not slip on drive pulley, i.e. enough to drive
belt.
NOTE: 1. Belt occasionally shrinks depending on carried materials or type of belt. In this case make
adjustment by turning take-up bolts counterclockwise.
2. Excessive belt take-up may overload motor or shorten service lives of belt, pulley, etc.
Standard belt expansion percentage
5
TAKING UP THE BELT
When belt is slackened off, take up belt as follows:
To take up belt, turn right and left take-up bolts(*1) of drive unit clockwise with a spanner. Take-up
pulley(*2) will then be moved and belt will be taken up. When turning take-up bolts(*1), adjust them
alternately, little by little, to keep their movement lengths the same.
If belt is taken up too much, properly adjust the tension by turning take-up bolts(*1) counterclockwise.
Nominal belt
width (mm)
～
200
250
～
600
600
～
1,000 or
Motor power of
0.2kW or more
Expansion
percentage (%)
0.2
0.15
～
0.1
0.1
1) Slacken belt.
2) Mark any two points on belt surface and measure
length between them (ℓ).
3) Take up belt.
4) Measure length between two marks (ℓ
1) again.
eg
ℓ＝
1000mm
0.2
％＝
2mm
ℓ
1
＝
1002mm
How to calculate belt expansion percentage
