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RH5 8.9 Measuring Belt T ension SERVICE MANUAL 8.9 − 2 DA3SEC − 85 − 210 − A0 Procedure 1. T urn ON the POWER switch (1). 2. Enter tension parameter using the tenkey pad (2). (See table below .) 3. Press the MEASURE swit…

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8.9 Measuring Belt Tension
SERVICE MANUAL
RH5
8.9−1
DA3SEC−85−210−A0
8.9 Measuring Belt Tension
DA3SEC−85−210−A0
Sentence No.
8.9.1 Sonic Tension Meter
4
5
1
3
2
=REFERENCE=
Note that sonic tension meter is not included in RH5 and it is not available as a maintenance part.
RH5
8.9 Measuring Belt Tension
SERVICE MANUAL
8.9−2
DA3SEC−85−210−A0
Procedure
1. Turn ON the POWER switch (1).
2. Enter tension parameter using the tenkey pad (2). (See table below.)
3. Press the MEASURE switch (3).
4. While keeping the gap between the microphone and the belt approx. 2 mm, snap the belt by finger for
measuring.
Microphone
Belt
Approx. 2 mm
5. Read the measured value. If the value is out of the tolerance, adjust the belt tension for measurement.
=CHECK=
x If the MIC GAIN lamp (4) flashes before measuring, turn down the control volume (5)
x Do not make the belt interfere with the microphone when snapping it by finger during measuring.
x Set belt tension more than tolerance value at the assembling stage and after turning the belt by over
one turn for uniforming tension of the belt. Then make remeasurement to settle the tension value within
the tolerance value in 24 hours. (The belt under assembling stage is assured to be stretched.)
Parameter list of belt tension
Unit Type Weight Width Span Tolerance
Main drive unit
()
NM−8244A/B/C
038
(/
2
)
25
337 (mm)
19 5
(k f)
(upper)
NM−8245A/B/C
0.38 (g/cm
2
) 25
538 (mm)
19.5 (kgf)
Main drive unit
(l )
NM−8244A/B/C
038
(/
2
)
25
448 (mm)
19 5
(k f)
(lower)
NM−8245A/B/C
0.38 (g/cm
2
) 25
650 (mm)
19.5 (kgf)
Z axis driver NM−8244C
038
(/
2
)
25
232
()
19 5
(k f)
NM−8245C
0.38 (g/cm
2
) 25 232 (mm) 19.5 (kgf)
NM−8244A/B
038
(/
2
)
25
149
()
19 5
(k f)
NM−8245A/B
0.38 (g/cm
2
) 25 149 (mm) 19.5 (kgf)
8.9 Measuring Belt Tension
SERVICE MANUAL
RH5
8.9−3
DA3SEC−85−210−A0
8.9.2 Main Drive Unit
Belt
Measure the center part.
Belt
Micro−
phone