33
WWW.PARKERMOTION.COM
PH: (724)
-
861
-
8200
HMR Series Positioners
9.7.1
Check belt tensioning
The most certain results measuring belt tensioning can be adjusted and reviewed in practice by an experienced specialist.
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
.
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
from the center 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.
•
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.
Attention
The max. permissible pulling force of the toothed belt may not be exceeded under any circumstances.
Frequency meter
Belt
Product size,
Belt
Clear belt length 500mm
Clear belt length 250mm
Motor mounting position
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
NOTE
After retensioning the belt twice a replacement is necessary
