33
EN
9.7.1 Check belt tensioning
The most certain results measuring belt tensioning can be adjusted and reviewed in practice by an experienced spe-
cialist. However, the toothed belt tension is measured and adjusted most reliably by using a belt tension measuring
device. One method is to adjust using the
frequency meter
.
ATTENTION
The max. permissible pulling force of the toothed belt may not
be exceeded under any circumstances.
Please direct any queries related to purchasing or loan of a rate monitor to the manufacturer directly.
► If present the IP54 cover must be removed described in section. 7.4.1.
► The payload must be removed from vertical oriented positioners.
► Move the carriage unloaded in both directions so the belt will subside.
► Adjust
distance A
(see page 32) from the centre of the
drive shaft
to the
carriage
with 500 mm or 250 mm
on short positioners.
►
Activate the toothed belt by pulling the center of the clear toothed belt until it vibrates.
► Measure the resulting frequency in the center of the clear toothed belt length with the
frequency meter
.
Take the measurement three times.
► Check the measured frequency with values from following table.
Belt frequency f
Prouct size,
Motor mounting position Belt
Clear belt length 500 mm
Clear belt length 250 mm
Frequency
Frequency
HMR08
20 AT 3
85 Hz
170 Hz
HMR11
25 RPP 5
83 Hz
166 Hz
HMR15 / 090°/270°
40 RPP 5
85 Hz
170 Hz
HMR15 / 0°/180°
25 RPP 5
83 Hz
166 Hz
HMR18 / 090°/270°
50 RPP 5
86 Hz
172 Hz
HMR18 / 0°/180°
40 RPP 5
83 Hz
166 Hz
HMR24 / 90°/270°
75 RPP 8
88 Hz
176 Hz
HMR24 / 0°/180°
50 RPP 8
108 Hz
216 Hz
► Follow the instructions depending of the measured variance:
f < 70%
Replacement of the belt.
70% < f < 90%
Retension the belt.
90% < f < 110%
No action necessary.
Note
After retensioning the belt twice a replacement is necessary.
Belt
Frequency meter