Mitsubishi Electric MP-J25-PS, Technical Manual

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3-11. Adjustment of the timing belt tension
(1) Check if two screws <2> which fixing the motor drive unit <1> are loosened.
(2) loosen the nut <5> and adjust the timing belt tension by turning the tension screw <4> in the arrow
direction. Adjust the timing belt tension in the range of 220
±
30 (N)
Note In the case of rotation position, the timing belt tension may fluctuate depending on mounting state of
this device. Therefore, measuring plural position of timing belt tension after rotating the timing belt and
adjust it by average value. Above explanation is based on using by sonic type tension meter.
(3) After adjustment, tighten the screw <2> and nut <5>.
Note When using the sonic type tension meter set each parameter according to following value.
Belt width: 15 (mm)
Belt span: 334 (mm)
Mass of per unit width for one meter in length: 5.4 (g/mm/m)
<1>: Motor drive unit
<2>: Screw
<3>: Timing belt
<4>: Tension screw
<5>: Nut
<4>
<3>
<5>
<2>
<1>
Smaller pulley
(Drive)
334mm (Belt span)
Large pulley