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the
-3
character. This allows the eccentric shoulder to
rese,!Jt itself in the compensating arm.
CAUTION:
Barrel
FIGURE 84.
Arm Assembly in -5 Position
Forming the paddle has no effect on the negative five po-
sition. This can easi Iy be seen by looking at Figure 84
whi ch shows the arm assembly in a negative five position.
+5
+4
+3
+2
+1
0
,' > -
fA
j)..
/>-
/)\
IA
I,-~
/L::::'
/'L~
ILl
11\
,'L_\
,' L _\
/
\
/
\
I
\
I
\
I
\
\
/
\
I
\
/
/
'
/
\
/
\
I
/
'v
V
V
'..;
v'
In this position there is a clearance between the pad-
dle and the barrel on the rotate armi therefore any
change in the paddle position just increases or decreases
this clearance without affecting the negative five posi-
ti on of the rotate arm.
The paddle adjustment dOes affect a!! of the rotate posi-
tions from a negative three to a positive five position
equally because it controls how long the compensating
arm wi II rotate about the eccentri c shou Ider on the rotate
eccentric arm as it travels from the negative five position
towards the negative three position. In other words
r
the
more clearance there is between the rotate arm and the
paddle
I
the farther the compensating arm can travel und-
er a ratio change condition as it moves towards the neg-
ative three position.
Figu re 85 illustrates how the detenti ng pattern of the
typehead is affected by the ratio change adjustment.
Noti ce in Figure 85A that all the rotate positions from
th~
-3 to the +5 detent equa II y but much less negative
than the -5. Thi s i ndi cates that there is too much rati
0
change (too much motion) in the system between the -5
and the -3. The paddle shou Id be formed in until the -3
detents the same as the -5.
Figure 8SB iliustrates the detenting pattern of a system
that lacks a suffi ci ent amount of rati
0
change. All the
rotate positions from -3 to +5 detent alike but too far
negative with respect to the -5. The system lacks motion
between the -5 and the
-3i
therefore the paddle should be
formed out to increase the amount of ratio change. Note
that the negative four position is detenting the same as
the -3 in Figure 85B. This is because the ratio change is
":. :< :.:
:':.~. ~
B. Insufficient ratio change
- - - - - - - - - - - - - - - i l .. _ . . ::; ............
~
.
'. '.
C. Correct ratio change - - - - - - - - - - - ) ....
~}··~:;~.~X},.;;:·t:\~{.:~·r~
FIGURE 85.
Ratio Change Adjustment
r~·!;D::,~~.:·;·:::.~:::;:;.:···.?
2-25
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