To apply a new cam: Drive out taper pin and slip cam off the shaft, placing a new one on the shaft in such a position that the holes in the cam will match with the hole in the shaft. Use an 8 x 32 headless screw to hold the cam in position. Put a thick matrix with a full size lug in the box in the regular way. See that the lift is adjusted to raise the matrix 1/32 of an inch above the upper rails. Then turn the distributor screws by hand, and when the matrix starts to raise and enter the screws, the side of the matrix opposite the distributor shifter should clear the threads on the distributor screws 1/32 of an inch. If the matrix does not clear the threads 1/32 of an inch, loosen the small screw in the cam, turn the cam so that when the matrix lift starts to raise the matrix it will clear the threads properly. Fasten the cam securely with the screw, and then run through a few lines to make sure that the cam is set right. Then drill a hole in the shaft and fasten with a pin.
Before applying a new matrix lift cam, make sure that the upper and lower rails in the box are not worn; if worn, renew the rails before applying the new cam. It is seldom necessary to replace a lift cam, due to the small amount of wear the cam undergoes.
Distributor Troubles
Considerable annoyance and lost time is caused by distributor troubles. Some of the most frequent troubles may be traced to the following:
The lifting of two thin matrices to the distributor is caused by having too much space between the end of the bar point and the vertical face of the rails, due to worn rails or bar point, or both.
Bent matrices are caused by the rails being worn, worn bar point, matrix lift out of adjustment, worn lift cam, safety spring broken or not functioning, conveyer screws out of time.
Matrices may drop in the wrong channel of the magazine if the flexible guides become bent. If the lugs of the matrices are thicker than those regularly running in that channel, the matrices will clog in the entrance and stop the distributor.
The back conveyer screw, being set too far from the front screws, will cause the matrices to fall in the wrong channel or twist as they leave the distributor box rails. Adjust the screw with the two adjusting screws at each end of the conveyer screw bearing.
A floor that is uneven or shaky will cause the matrices to drop in the wrong channel.
Matrices will drop on top of the partitions or in the wrong channel if the distributor beam is out of adjustment. Adjust with the screw that is fastened to the beam at the front and banks against the right side of the yoke.