Table of Contents
Advertisement
4.3.2 Friction Drive Torque Adjustment
1. Manually escape the machine until drum adjusting screw
is at the top.
2. Turn power off and manually turn belt until hole at top
of housingis aligned with adjusting screw.
3. Adjust screw for required torque. (4.3.1). Turn screw
clockwise to increase torque; a half-turn changes reading
about 60 grams.
4.4 ESCAPEMENT UNIT
4.4.1 Escapement Unit Service Check
Check the residual on the left yoke end for wear; clean
dirty points and lubricate armature pivot. Clean oil and dirt
from escapement wheel. Too much torque on the friction
drive may make action of escapement armature sluggish.
The escapement wheel mustbe free of lubricants. Incorrect
strap tension or improper make-time of the escape armature
contact may cause double spacing or erratic escapement.
The contact operating pin should be free enough to allow
pin to be rotated between the finger tips. A binding or
canted operating pin usually indicates poor adjustment of
the unit.
Wipe off excess lubricant around escapement armature
pivot. Grease at this point picks up dirt and card chips, and
may cause escapementfailures. Observe the armature while
backspacing. If the armature drags with the movement of
the escapement wheel, the armature pivot spring requires
adjustment.
4.4.2 Escapement Unit Adjustments
1. Remove escapement magnet unit from machine.
2. Make adjustments | through 7 in Figure 4-2 (Part 1).
Position yoke so that top surface
of armature is flush with top of
mounting plate
"
7
'Y
Lo
/
i
/
\\
1
1
/
\
Position of armature
!
/
\
on escapement assembly
|
|
ov
5°
]
1
\
}
\
\
TT
se
1
ie
\
/
{3
\
'
\
eo
"7
Contact
Operating
Pin
ee
a"
/
/
/
/
.
/
rm
Add or remove steel shims
to
(part 305271) under core to
obtain 0.004" to 0.008"
\
clearance between armature
\
and core
\
Armature touching residual
Figure 4-2. Escapement Adjustment (Part 1 of 2)
42
(4/69)
Note — zero clearance
-
Adjust spring for 7
0.045" to 0.055"
Adjust bracket as shown to position
contact operating pin parallel to surface A
Armature notched here
Advertisement
Table of Contents
