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540 MOTION PICTURE HANDBOOK
No. 32. The Star and its Shaft J, P. 5, may be removed by following Instructions Nos. 26, 28, and 31. Having done so, take out the two set screws in the hub of intermittent sprocket D^IO, P. 1, and you can pull the star and shaft out.
No. 33. To Remove the Bearings of the Intermittent sprocket Shaft follow Instruction No. 32. The bearing on the star end is held by a set screw, the head of which is in the top of the casting, and the bearing in the other end is held by a set screw in the face of the casting at the end of the bearing. Remove these screws and you can drive the bearing out and insert new ones. The screws in the face of the casting which holds the left hand bearing should be set up just far enough so there is no end motion in the intermittent sprocket. If you set it tight you will bind the sprocket; if you leave it too loose the sprocket is apt to have end playNo. 34. The Bearings of the Cam Shaft may be removed by following Instructions No. 26 and 31. This bearing extends the full length of the casting. It is held at one end by a set screw, the head of which is in the top of the framing carriage casting; the other end is held by . two set screws which bear against the lug in the end of the bearing. This bearing is eccentric. Having loosened the two set screws which bear against the lug, and the one in the top of the casting which holds its other end, you may drive the bearing out, using a hard wood punch. In replacing it it will be necessary to adjust the bearing carefully. Proceed under Instruction No. 35.
No. 35. Adjusting Intermittent Movement. — When the intermittent sprocket develops considerable circumferential play, or the intermittent movement becomes noisy it is in need of adjustment. Proceed as follows. Set screws D-26, P. 4, (two of them), bear against eccentric bearing lug D-5, P. 4, and a movement of these set screws has the effect of altering relation of the star and cam to each other. When you loosen the lower screw and tighten down on the upper one you tighten the cam against the star, thus eliminating the lost motion in the intermittent sprocket, but you must be very careful and not get the movement too tight or you will have trouble, particularly if the adjustment be done while the machine is cold. Tighten up on the upper screw, first having backed off on the lower one, until you can feel just the least bit of shake in the intermittent sprocket when you try it with your finger. Having got your adjustment made tighten up both set screws. This adjustment must be made with the