maintenance and safety inspections
file: n:\article\cos14310m5-v1_08hpc-en\20150130_cos14310m5-v1.08hpc-en_instructions_for_use_h-p-cosmos_treadmill.doc
© 2015 h/p/cosmos sports & medical gmbh author: fh [email protected] created 30.01.2015 printed 30.01.2015 page: 130 of 216
8.8
Control and tightening of the driving belt (poly-V belt system)
The correct tension of the driving belt is very important for proper operation of the running machine. If the tension is too
high, this may cause defects of the motor and roller bearings. Too low tension results in the backlash of the drive belt
and therefore in higher abrasion and power losses.
The poly-V belt is provided with a belt adjuster and normally requires very little tightening. The belt adjuster offers the
possibility of readjustment.
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Attention: Dangerous gap/capture area at the tail shaft at the back of the device (belt re-entry
zone). Take care that long hair and loose clothing are not caught in the gap of the tail shaft.
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For safety reasons, the adjustment procedure must be attended by a second person who can
immediately press the emergency stop button in an emergency.
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Switch off the running machine and pull the mains plug before intervening.
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In case of any maintenance work on the treadmill, ties have to be removed. The tie might be
pulled in and the person wearing will be strangled.
8.8.1
Checking the tension of the driving belt with the “slipping-test“
The “slipping-test“ can detect if the drive belt has too low tension. The “frequency-test“ must be used (see next point) to
exclude too high tension. The driving belt tension is checked as the running belt tension:
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Block the running belt at a speed of 1 - 1.5 km/h.
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Ensure that there is no backlash between the motor shaft and the driving belt.
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Ensure that the tension at the bottom run (see picture) is between 98 Hz and 103 Hz (frequency at
oscillation).
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The noise at higher speeds and the correct course on the pinion should be considered.
