INITIAL ALIGNMENT ADJUSTMENTS
The print shaft has to be rotated so the groove is in a particular location so that the movements of the ball and related parts in the carrier are at an appropriate time compared to when the tilt and rotate tapes are being moved. This is a very easy visual adjustment. The position of the shaft is refined near the end to fine tune the print operation.
The initial position of the typeball relative to the detent teeth has to be established by loosening a setscrew from underneath and then twisting the ball in a specific procedure. The detent teeth move into the triangle openings around the bottom perimeter of the type ball to lock it to a specific location just before the ball strikes the paper. The tilt and rotate mechanisms only need to move the ball close enough so the detent enters the proper triangle opening.
BALANCE ARM ADJUSTMENT
Since the typeball has to rotate nearly 180 degrees to reach all eleven columns of characters, the rotate mechanism twists the ball in both directions with five possible amounts of twist per direction. This is accomplished by the R1, R2 and R2A levers which move the rotate arm from zero to five units of movement. The R5 lever moves the balance lever, which provides five units of movement in the opposite direction.
Thus, R5 with no other levers will move five units in the negative direction, R5 with just the R1 lever moves four units in the negative direction, R1 with no other levers moves one unit in the positive direction and so forth. We need to adjust the balance arm so that its operation is exactly equal to the movement of five units from the R1/R2/R2A levers.
When I checked this, the position of the ball with latched home versus I/O home was quite different. When I am in the shop again tomorrow I will adjust the balance arm to equal this out and then proceed with the following adjustment steps.
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