Geneva - IBM 1402 Reference Manual

CLUTCH RATCHET REMOVAL
1. Remove main drive belt.
2. Remove nut in center of idler pulley stud.
3. Pull stud and input idler pulley.
4. Remove screw in end of picker knife camshaft
and pull gear and disk assembly off shaft.
5. Loosen three set screws and pull ratchet off the
assembly. Do not lose spacer between two outside
bearings.
6. Install in reverse order.
7. Re-time clutch, geneva, and PLCB's.
Geneva
ADJUSTMENTS
Internal repairs to the geneva housing must be made
at the factory.
1. Locate geneva housing on side frame to produce
a perceptible minimum to .0045" backlash in
DYNAMIC
TIMER
DRIVER
Figure 3-19. Punch Timing Belt Tensions
PA CAMS
1 ST FEED ROLL
8 32
gears. If there is too much backlash, punching
registration will be off. If there is no backlash, the
gears will be damaged.
2. Check for geneva gear backlash.
a. Remove punch unit.
b. Crank machine to a point where intermittent
rolls are held stationary for punching (approx-
imately 4
0
before line of index).
c. Grip an intermittent roll and turn in both
directions. Check for slight wink. Check both
sets of rolls at all 12 digit-times.
TIMING
Check clutch timing before proceeding with this ad-
justment.
1. Geneva timing pin should seat at 0° and at al-
ternate cycle points throughout a machine cycle.
See Figure 3-23.
2ND FEED ROLL
1" 1'"
- ± -
16 32
1 LB.
GENEVA
GENEVA
INPUT
3-15