IBM 1403 Field Engineering Maintenance Manual page 88

Motor
Roll Pin
Type
Figure 85. Skew Correction Drive
2, Adjust the location of the switch so the plunger just
bottoms when a .010" feeler gage is placed between
the plunger and the rollpin.
Switch J and 2 Adjustment (Cam Type)
1. Rotate the eccentric shaft (Figure 85) so the cam is
actuating the switch.
2. Adjust the position of the switch so when the
plunger bottoms, there is .015" between the plunger
and the high portion of the cam. This is to insure
that the cam is not driving the plunger against its
stop.
Pivot Plate Eccentric-Shaft Adjustment
This adjustment provides the initial setting for the
eccentric and the pivot plate.
1. Important: Position the ribbon reverse lever so the
upper ribbon spool is driving.
2. Loosen the eccentric shaft setscrews that hold this
shaft to the motor shaft.
3. Rotate the shaft so the eccentric positions the top
88
Motor
Cam
Type
of the nivot nlate and unner left ribbon snool as far
~.L .L.L ...
to the front as possible.
4. Tighten the shaft setscrews.
Roll-Pin Collar Adjustment
1. Make the eccentric shaft adjustment first, and leave
it so the upper left ribbon spool is to the front as
far as possible.
2. Loosen the roll-pin collar setscrews (Figure 85) and
rotate the collar until switch 2 is just transferred
(N/C points, opened). Be sure the collar is aligned
properly with both switches.
3. Tighten the setscrews.
Note: This adjustment provides for maximum skew cor-
rection. For less correction, adjust the collar to operate
Switch 2 either earlier or later.
Switch-Cam Adjustment
1. Make the eccentric shaft adjustment first, and leave
it so the upper left ribbon spool is to the front as
far as possible.
2. Loosen the setscrews in the cams (Figure 85) and
rotate cam 2 until switch 2 is just transferred (N/O