3-6. Adjustments
CLP-621 & CLP-631 3-48
Principle of operation of parallelism change with the Tension Base Adjust Cam:
The parallelism of the Ribbon Sensor F/R Unit can be changed by means of the eccentric
mechanism of the Tension Base Adjust Cam.
The Tension Base Adjust Cam has projections “a” and “b”. The projection “a” is inserted
into the slotted hole “a’ ” on the base (fixed part), while the projection “b” is inserted into
the hole “b’ ” on the Ribbon Tension Frame F/R SA of the Ribbon Sensor F/R Unit
(movable part).
As you can see from the figure, the projection “a” is eccentric with respect to the projection
“b”. Accordingly, as your turn the Tension Base Adjust Cam (after loosening screws “A” (2
pcs.) and “B”), the eccentric projection “a” pushes the slotted hole “a’ “ so that the Ribbon
Sensor F/R Unit itself turns around the supporting point “c”. (The Ribbon Sensor F/R Unit
turns in the same direction as you turn the Tension Base Adjust Cam.)
[In the case of front side]
A
B
a
a’
b’
c
c’
b
a’
b’
SA, Ribbon Tension Frame F
(movable part)
Tension Base
Adjust Cam
SA1, Ribbon Unit Base Plate (fixed part)