[7.G] Control And Tightening Of The Driving Belt; [7.G1] Driving Belt With Poly-V-Belt System - h/p/cosmos 150/50 locomotion de med Operating Instructions And Service Manual

N
During "reverse of belt rotation" (downhill run) a readjustment of the belt
position (centring) is required.
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Through evenly turning the left and the right trimming screw to the right you
can tighten the running belt if necessary. See point running belt tension.
Note: For running machines with a running surface of 200 x 75 cm and bigger the trimming screw for the running belt is
located at the front drive shaft. In this case the running belt movement is inverse after turning the screws.
The hex socket must be pulled out of the screw immediately after usage due to risk of injury!
Control and tightening of the driving belt
[7.G]
The correct tension of the driving belt is very important for a proper operation of the running machine. A too high tension
can cause defects of the bearings from the motor and the roller. A too low tension results in backlash of the drive belt
and therefore in higher abrasion and power losses.
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This test can only be done with a dismounted motor hood. Don't touch any parts in the motor
compartment and take care not to be caught with long hair or loose clothes in the capture
area of the danger zones.
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For safety reasons the procedure of adjustment has to be supervised by a second person
that can press the emergency-stop in an emergency.
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Before intervening in the device for safety reasons switch the running machine off and pull
the mains plug out.
Driving belt with poly-V-belt system
[7.G1]
The poly-v-belt is provided with a belt adjuster and requires tightening usually very seldom. The belt adjuster offers
the possibility of readjustment.
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Checking the tightening of the drive belt with the „slipping-test"
With the „slipping-test" only a too low tension of the drive belt can be recognised. To be able to exclude a too high
tension of the drive belt, the „frequency-test" (see next point) must be used.
The driving belt tension can be controlled according to point control of running belt tension.
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Block the running belt at speed of 1 to 1.5 km/h.
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No backlash must be between the motor shaft and the driving belt.
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The tension at the bottom trumm (see picture) must be between 98 Hz and 103 Hz (frequency at oscillation).
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The noise (at higher speeds) and the straight position of the driving belt need to be considered.
© 2008 h/p/cosmos sports & medical gmbh
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maintenance & safety inspections
created 01.09.2008 printed 08.10.2008 page: 113 of 176