Universal L60 manual Label Sensing Star Wheel, Star Wheel Adjustment Procedures

LABEL SENSING STAR WHEEL

The star wheel causes the applicator to stop dispensing a label. When the star wheel is down on a flat side, it will slide over the label until the lead edge of the next label contacts the point of the wheel causing the wheel to turn over. As it turns up on a point and back down, the star wheel arm activates a small micro-switch breaking the circuit, thus stopping the advance of the label web. If the star wheel arm fails to activate the switch as it turns over the applier will dispense labels continuously.

NOTE: If the unit is equipped with photoelectric label sensing or a clear label sensor, the position of the sensors relative to the label is not critical in most cases. The clear label sensor detects the difference in thickness from the label to the backing material. Metalized graphics or alphanumeric characters will cause this sensor to false trigger. Locate the sensor away from the path of metalized material.

Star Wheel Adjustment Procedures

Loosen the two screws (2 and 7), which hold the mounting plate (9) to the mounting bracket (1). The screw hole (7) is slotted allowing the plate to move toward or away from the label guide support plate (6). With the star wheel (5) laying flat against the label web, move the mounting plate (9) in toward the label web as far as it will go.

Then slowly bring it back until the micro-switch (3) activates. (A small “click” will be heard when this occurs). Tighten the screws (2 and 7) to hold the plate in this position. To be sure that tightening the screws did not change the position of the plate, check by raising the star wheel off the label web. A “click” should be heard when the star wheel is raised and also when it is lowered. A further check should be made by pulling the label web under the star wheel until it starts to turn up on a point. A “click” should be heard at this point and also as the star wheel drops back down onto a flat side. Be sure that the spring (8) is attached to the star wheel arm

(4) as this assures a firm contact of the star wheel to the label.

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Fig 18

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