If you're asking “How do I adjust a label sensor correctly?”: start by identifying the sensor type (optical or ultrasonic), then run a two-point teach (backing-only, then label+backing), confirm the label and gap signal, and fine-tune sensitivity so the sensor to detect the media. If you're asking “How do I adjust a label sensor correctly?”: start by identifying the sensor type (optical or ultrasonic), then run a two-point teach (backing-only, then label+backing), confirm the label and gap signal, and fine-tune sensitivity so the sensor to detect the media. If you're asking “How do I adjust a label sensor correctly?”: start by identifying the sensor type (optical or ultrasonic), then run a two-point teach (backing-only, then label+backing), confirm the label and gap signal, and fine-tune sensitivity so the sensor to detect the media is stable at. Reason: The feeder feeding speed is lower than the pick-up speed of the SMT machine. The feeder misjudged the placement head of the SMT machine. Adjusting the sensor correctly will eliminate issues such as misalignment, overlapping, or wasted labels, ultimately saving you time and resources. Now. To adjust a semi-automatic label machine , you set the label gap and sensor first, then square the label path (unwind → peel plate → take-up), and finally fine-tune product guides and applicator pressure so the label meets the bottle at the correct tangent point. The following procedures outline the recommended steps for both product. All: If indicators show the sensor is working correctly, connect a voltmeter to the output connection while it is connected to the machine. The output should change between about 0 VDC and a positive voltage (+5, +12, +24 depending on the power to the sensor and the internal power of the control.