Reference: Adjusting Speed Reduction Belt Tension With A Tension Meter - Yamaha FLIP-X Series User Manual

Chapter 3 Adjusting the robot
5) If the slack (or tension) measured in step 3 is smaller than the range specified in Table 2-2,
6) Measure the belt tension again as in step 3).
7) Tighten the motor plate bolts securely.
8) Reattach the belt cover.

Reference: Adjusting speed reduction belt tension with a tension meter

We recommend using a tension meter to adjust the belt tension more accurately.
Recommended tension meter: U-505 (Made by UNITTA)
Measurement method
To make the drive belt tension adjustment of step 3), pull the belt to a position where a load is to
be applied and adjust the belt tension by measuring the frequency with the tension meter while
referring to the table below.
For details on how to use the tension meter, refer to the tension meter instruction manual.
move the motor case in the direction that increases belt tension. If the slack or tension is
greater than the range in Table 2-2, move in the direction that reduces belt tension. Then,
temporarily retighten the motor plate bolts.
When the load producing the specified slack (or tension) is within the allowable range in
Table 2-2, no adjustment is required. If not within that range, adjust the tension (or slack) by
repeating steps 3) to 5).
Robot model Tension (N) Frequency
B10 44 to 49
B14, B14H 44 to 49
Tension increases Tension increases ension increases
Tension reduces Tension reduces ension reduces
Span length
(Hz) (mm)
180 to 190 82
180 to 190 82
3-8
Motor plate bolts Motor plate bolts Motor plate bolts
Belt width Unit mass
(mm)
(g/width [mm] _ length [m])
20
2.5
20
2.5