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TB 26 / Abnormal noise from DP (gear step-out noise)
2MV-D139/M
Date: 19-07-2013
T
OPIC
:
When the power is turned on or paper is fed to the DP, the engagement of gears (A,B) may drift and abnormal noise due to
the gears step-out depending on the variation of the parts. Thus, the following is changed.
C
ONTENT OF
C
HANGES
:
The spring tension to the hook lever that locks the top cover is strengthened to prevent the top cover from being lifted up.
ｷ ﾞ ﾔ
(
A
)
Machine rear side
Change of spring (No.1)
Before After
Appearance
Free height
24.3mm
21.3mm
Load 6N 9N
Color Black
Brown
1) If the ascending force of the DP
feed roller increases due to variation
of the torque limiter (
X
in the above
figure) that drives the DP feed roller,
the hook and hook lever are
dislocated and the DP feed roller
pushes up the top cover.
2) Then, the engagement of the gears
(
A
,
B
) may drift and abnormal noise
may be heard.
The tension of the spring (No.1) is
strengthened to prevent the top cover
from being lifted up due to the
dislocated hook lever.
Occurrence mechanism
(Below with the top cover closed)
Top cover
DP feed roller
Hook
Torque limiter (X)
Gear (A)
No.1
1
Spring (changed)
Gear (B)
Hook lever
Gear (A)
Hook lever
Top cover
Hook
No.1
1
Spring
Gear (B)
